CN103348737A - Location update methods and mobility management entities - Google Patents

Location update methods and mobility management entities Download PDF

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Publication number
CN103348737A
CN103348737A CN2010800023215A CN201080002321A CN103348737A CN 103348737 A CN103348737 A CN 103348737A CN 2010800023215 A CN2010800023215 A CN 2010800023215A CN 201080002321 A CN201080002321 A CN 201080002321A CN 103348737 A CN103348737 A CN 103348737A
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China
Prior art keywords
plmn
msc
vlr
mme
circuit domain
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Chinese (zh)
Inventor
于益俊
陆峰
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Location update methods and Mobility Management Entities (MMEs) are disclosed by embodiments of the present invention, wherein a method includes the following steps: an MME obtains roaming restriction of a first Circuit Switched (CS) domain Public Land Mobile Network (PLMN) where a first Mobile Switch Center /Visitor Location Register (MSC/VLR) is located, according to received location update rejection information transmitted from the first MSC/VLR; the MME selects a second CS domain PLMN; the MME allocates a location area identifier, including a PLMN identifier of the second CS domain PLMN; the MME selects a second MSC/VLR according to the location area identifier; the MME sends a location update request message to the second MSC/VLR so that the second MSC/VLR executes a location update procedure in CS domain. Embodiments of the present invention avoid the case that: CS Fallback (CSFB) service cannot be provided by a User Equipment (UE), which fails to execute the location update procedure in CS domain, in a PLMN supporting CSFB, due to the roaming restriction of the MSC/VLR-located PLMN, thereby improving the success ratio of the service.

Description

Location updating method and mobility management entity
Location updating method and mobility management entity technical field
The present embodiments relate to mobile communication technology field, more particularly to location updating method and mobility management entity（Mobility Management Entity, abbreviation MME).Background technology
Evolved universal GSM land radio access web（Evolved Universal Mobile Telecommunication System Territorial Radio Access Network, abbreviation E-UTRAN) and evolution block core net（Evolved Packet Core Network, abbreviation EPC) constitute evolved packet system（Evolved Packet System, abbreviation EPS).And due to before operator intention many business all operate in circuit（Circuit Switching, abbreviation CS) in domain, for example：2G/3G circuit domain, in order to reuse existing circuit domain business in EPS networks, therefore is proposed by EPS network connections to circuit domain core net, so that user equipment（User Equipment, abbreviation UE) it can be initiated and receiving circuit domain business in EPS networks, and 2G/3G networks completion circuit domain business is returned to by E-UTRAN, its network architecture and processing method are properly termed as " circuit domain dropping "（CS Fallback, abbreviation CSFB).
In above-mentioned CSFB flows are performed, UE performs access process from EPS network registries to circuit domain core net equipment mobile switching centre/visitor location register in E-UTRAN（Mobile Switching Center/Visitor Location Register, abbreviation MSC/VLR) on.In above-mentioned access process is performed, mobility management entity（Mobility Management Entity, abbreviation MME) it is responsible for the suitable MSC/VLR (i.e. the MSC/VLR of circuit domain) of selection, above-mentioned UE is when execution CSFB flows fall back to circuit domain, the public land mobile net where access MSC/VLR（Public Land Mobile Network, abbreviation PLMN), complete follow-up circuit domain business.
In above-mentioned access process is performed, if there is roaming scence, the failure of circuit domain position update flow may be caused because the selected circuit domain PLMN roamings of MME are limited, cause UE supporting CSFB PLMN in can not carry out CSFB services, reduce service success rate and Consumer's Experience.The content of the invention
The embodiment of the present invention provides location updating method and mobility management entity, CSFB services can not be carried out to avoid the UE caused by the selected circuit domain PLMN roamings of MME are limited from carrying out the failure of circuit domain position update flow in the PLMN for supporting CSFB, service success rate is improved.
The embodiments of the invention provide a kind of location updating method, including：
The location updating refuse information that MME is sent according to the first MSC/VLR of reception, the first circuit domain PLMN roamings where knowing the first MSC/VLR are limited；
The MME selection second circuits domain PLMN;
The MME dispensing positions area mark, PLMN of the Location Area Identification comprising the second circuit domain PLMN is identified；
The MME selects the 2nd MSC/VLR according to the Location Area Identification;
The MME sends location update request message to the 2nd MSC/VLR, so that the 2nd MSC/VLR execution circuits domain position update flow.
The embodiments of the invention provide another location updating method, including：
The message that MM E are sent according to the HLR/HSS of reception, knows in the presence of at least one roaming PLMN, and therefrom select a roaming PLMN that can be used for circuit domain;
The MME dispensing positions area mark, PLMN of the Location Area Identification comprising one roaming PLMN available for circuit domain is identified；
The MME selects MSC/VLR according to the Location Area Identification;
The MME sends location update request message to the MSC/VLR, so that the MSC/VLR execution circuits domain position update flow.
The embodiments of the invention provide another location updating method, including：
Target MME obtains the circuit domain PLMN that ^^ sources MME has been selected;
The target MME selects the circuit domain PLMN; The target MME dispensing positions area mark, PLMN of the Location Area Identification comprising the circuit domain PLMN is identified；
The target MME selects MSC/VLR according to the Location Area Identification;
The target MME sends location update request message to the MSC/VLR, so that the MSC/VLR execution circuits domain position update flow.
The embodiment of the present invention additionally provides a kind of mobility management entity, including：
Know module, for the location updating refuse information sent according to the first MSC/VLR of reception, the first circuit domain PLMN roamings where knowing the first MSC/VLR are limited；
First choice module, for selecting second circuit domain PLMN;
Distribute module, for dispensing position area mark, the Location Area Identification includes the second circuit domain
PLMN PLMN marks；
Second selecting module, for according to the Location Area Identification, selecting the 2nd MSC/VLR;
Request module, for sending location update request message to the 2nd MSC/VLR, so that the 2nd MSC/VLR execution circuits domain position update flow.
The embodiment of the present invention additionally provides another mobility management entity, including：
First choice module, for the message sent according to the HLR/HSS of reception, knows in the presence of at least one roaming PLMN, and therefrom select a roaming PLMN that can be used for circuit domain;
Distribute module, for dispensing position area mark, PLMN of the Location Area Identification comprising one roaming PLMN available for circuit domain is identified；
Second selecting module, for according to the Location Area Identification, selecting MSC/VLR;
Request module, for sending location update request message to the MSC/VLR, so that the MSC/VLR execution circuits domain position update flow.
The embodiment of the present invention additionally provides another mobility management entity, including：
Module is known, for knowing the circuit domain PLMN that source MME has been selected;
First choice module, for selecting the circuit domain PLMN;
Distribute module, for dispensing position area mark, the Location Area Identification includes the circuit domain PLMN PLMN mark；
Second selecting module, for according to the Location Area Identification, selecting MSC/VLR;
Request module, for sending location update request message to the MSC/VLR, so that the MSC/VLR execution circuits domain position update flow.
As shown from the above technical solution, the MME in the embodiment of the present invention is according to the first of reception
After the location updating refuse information that MSC/VLR is sent knows that the first circuit domain PLMN roamings where the first MSC/VLR are limited, by selecting another PLMN i.e. second circuit domain PLMN and corresponding 2nd MSC/VLR, so as to send location update request message to above-mentioned 2nd MSC/VLR, so that above-mentioned 2nd MSC/VLR execution circuits domain position update flow, the UE caused by the PLMN roamings where the first MSC/VLR are limited is avoided to carry out the failure of circuit domain position update flow in the PLMN for supporting CSFB and CSFB services can not be carried out, improve service success rate.Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, the required accompanying drawing used in embodiment or description of the prior art will be briefly described below, apparently, drawings in the following description are only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of schematic flow sheet for location updating method that the embodiment of the present invention one is provided；
Fig. 2 is a kind of schematic flow sheet for location updating method that the embodiment of the present invention two is provided；
Fig. 3 is the schematic flow sheet for another location updating method that the embodiment of the present invention three is provided；Fig. 4 is the schematic flow sheet for another location updating method that the embodiment of the present invention four is provided；Fig. 5 is the schematic flow sheet for another location updating method that the embodiment of the present invention five is provided；Fig. 6 is the schematic flow sheet for another location updating method that the embodiment of the present invention six is provided；Fig. 7 is the schematic flow sheet for another location updating method that the embodiment of the present invention seven is provided；Fig. 8 is a kind of structural representation for mobility management entity that the embodiment of the present invention eight is provided；Fig. 9 is the structural representation for another mobility management entity that the embodiment of the present invention nine is provided； Figure 10 is the structural representation for another mobility management entity that the embodiment of the present invention ten is provided.Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.
Fig. 1 is a kind of schematic flow sheet for location updating method that the embodiment of the present invention one is provided, as shown in figure 1, the location updating method of the present embodiment may comprise steps of：
The location updating refuse information that step 101, MME are sent according to the first MSC/VLR of reception, the first circuit domain PLMN roamings where knowing above-mentioned first MSC/VLR are limited；
Step 102, above-mentioned MME selection second circuits domain PLMN;
Step 103, above-mentioned MME dispensing positions area mark, PLMN mark i of the above-mentioned Location Area Identification comprising above-mentioned second circuit domain PLMN is only；
Step 104, above-mentioned MME select the 2nd MSC/VLR according to above-mentioned Location Area Identification;Step 105, above-mentioned MME send location update request message to above-mentioned 2nd MSC/VLR, so that above-mentioned 2nd MSC/VLR execution circuits domain position update flow.
In the present embodiment, after the first circuit domain PLMN roamings of the MME according to where the first MSC/VLR of the reception location updating refuse informations sent know the first MSC/VLR is limited, by selecting another PLMN i.e. second circuit domain PLMN and corresponding 2nd MSC/VLR, so as to send location update request message to above-mentioned 2nd MSC/VLR, so that above-mentioned 2nd MSC/VLR execution circuits domain position update flow, the UE caused by the PLMN roamings where the first MSC/VLR are limited is avoided to carry out the failure of circuit domain position update flow in the PLMN for supporting CSFB and CSFB services can not be carried out, improve service success rate.
Fig. 2 is a kind of schematic flow sheet for location updating method that the embodiment of the present invention two is provided, and the present embodiment is the specific embodiment of a upper embodiment.In the present embodiment, PLMN that UE is contracted (or be referred to as The affiliated PLMN of UE, or be referred to as to possess the PLMN of UE subscription data), hereinafter referred to as ownership place PLMN;PLMN (the either affiliated PLMN of referred to as MME or referred to as MME PLMN) where MME, hereinafter referred to as visited place PLMN.As shown in Fig. 2 the location updating method of the present embodiment may comprise steps of：
Step 201, UE send attach request to MME（Attach Request) message/tracing section updating request（Tracking Area Update Request, abbreviation TAU Request) message, the type of attachment of above-mentioned Attach Request message indicates that it is joint attach request（Combined EPS/IMSI Attach Request), or, the updating type of above-mentioned tracing section updating request message indicates that it is joint tracking area/location area updating request（Combined Tracking Area/Location Area Update Request) or joint tracking area/location area updating and IMSI International Mobile Subscriber Identity attach request（ Combined Tracking Area/Location Area Update with IMSI Attach Request );
Step 202, the part flow for performing packet domain attachment/tracing section updating flow；
Step 203, MME select a PLMN for being used for circuit domain to be the first circuit domain PLMN;Wherein, above-mentioned first circuit domain PLMN is further referred to as the first circuit domain PLMNL of MME selections
Specifically, when there is multiple PLMN available for circuit domain, above-mentioned MME selects one of them of above-mentioned multiple PLMN available for circuit domain, for circuit domain.Wherein, above-mentioned multiple PLMN available for circuit domain can be in attachment flow/TAU flows, MME can select for circuit domain（For example：CSFB is serviced）PLMN.Wherein, above-mentioned MME the modes such as information can be locally configured by MME knows above-mentioned multiple PLMN available for circuit domain, and the present embodiment is without limitation.
Step 204, MME distribution first position area mark（Location Area Identity, abbreviation LAI), the PLMN marks of the above-mentioned first circuit domain PLMN comprising selection during above-mentioned first position area is identified；Step 205, MME are identified according to above-mentioned first position area, select the first MSC/VLR;
Wherein, above-mentioned first MSC/VLR is further referred to as the first of the first circuit domain PLMN
MSC/VLR, or the first of the first circuit domain PLMN that MME is selected can also be referred to as MSC/VLR。
It should be noted that：Above-mentioned first circuit domain PLMN is further referred to as the first MSC/VLR PLMN, or the first PLMN where MSC/VLR, or the first MSC/VLR the first circuit domain PLMN can also be referred to as, or the first the first circuit domain PLMN where MSC/VLR, the present embodiment is without limitation.
Step 206, MME send position updating request to above-mentioned first MSC/VLR（Location Update Request) message；
Step 207, the first MSC/VLR send location updating refusal to MME（Location Update Reject) message, indicate that the first circuit domain PLMN roamings are limited；
Wherein, after the first MSC/VLR receives the above-mentioned location update request message that MME is sent, it is limited if the first MSC/VLR knows that above-mentioned first circuit domain PLMN is roamed（Roaming restriction), for example：Because the first circuit domain PLMN does not sign roaming agreement with ownership place PLMN, then the first MSC/VLR sends location updating refuse information to MME（Perform step 207);Otherwise, then the first MSC/VLR execution circuits domain position update flow, its processing is same as the prior art, and here is omitted.
Specifically, above-mentioned first MSC/VLR knows that above-mentioned first circuit domain PLMN roamings are limited, can be the first MSC/VLR after the location update request message in receiving above-mentioned steps 206, by itself judging that above-mentioned first circuit domain PLMN roams limited, direct execution step 207;Or can also be the first MSC/VLR after the location update request message in receiving above-mentioned steps 206, sent to HLR/HSS and update location message, judge that above-mentioned first circuit domain PLMN roamings are limited by above-mentioned HLR/HSS, more new position response message is returned from above-mentioned HLR/HSS to the first MSC/VLR, above-mentioned more new position response message indicates that above-mentioned first circuit domain PLMN roamings are limited, and then the first MSC/VLR performs step 207 again.The present embodiment the first MSC/VLR to more than knows that above-mentioned first circuit domain PLMN roams limited method and is not limited.
Wherein, cause value can be carried in above-mentioned location updating refuse information, for indicating that the first circuit domain PLMN roamings are limited, now MME performs step 208, otherwise, if carrying other reasonses value, MME sends attachment received message/tracing section updating received message to UE, indicates UE circuit domain services not It can use.Wherein, above-mentioned cause value can be existing cause value, for example：PLMN is not allowed to（PLMN not allowed) etc., or be worth the reason for can also be extension, for example：To roaming UE, the PLMN is not allowed to (PLMN not allowed for roaming UE) or roaming limited (Roaming restriction) etc., and title the present embodiment of specific cause value and cause value is not limited.
Step 208, MME select another to be used for the PLMN i.e. second circuit domain PLMN of circuit domain;Wherein, above-mentioned second circuit domain PLMN is further referred to as the second circuit domain PLMNL of MME selections
Specifically, when there are PLMN that other can be used for circuit domain, above-mentioned MME selection it is above-mentioned other can be used for circuit domain PLMN one of them, for circuit domain.Wherein, it is above-mentioned other can be used for circuit domain PLMN can be in attachment flow/TAU flows, MME can select for circuit domain（For example：CSFB is serviced）PLMN.Wherein, above-mentioned MME the modes such as information can be locally configured by MME knows that above-mentioned other can be used for the PLMN of circuit domain, and the present embodiment is without limitation.
The PLMN comprising above-mentioned second circuit domain PLMN is identified in step 209, MME distribution second place area mark, said second position area mark；
Step 210, MME are identified according to said second position area, select the 2nd MSC/VLR;
Wherein, above-mentioned 2nd MSC/VLR is further referred to as second circuit domain PLMN the 2nd MSC/VLR, or can also be referred to as the second circuit domain PLMN of MME selections the 2nd MSC/VLR.
It should be noted that：Above-mentioned second circuit domain PLMN is further referred to as the 2nd MSC/VLR's
PLMN, the either PLMN where the 2nd MSC/VLR or second circuit domain PLMN that can also be referred to as where the 2nd MSC/VLR second circuit domain PLMN, or the 2nd MSC/VLR, the present embodiment are without limitation.
Step 211, MME send position updating request to above-mentioned 2nd MSC/VLR（Location Update Request) message；
Wherein, after the location update request message that the 2nd MSC/VLR receptions MME is sent, if second MSC/VLR knows that above-mentioned second circuit domain PLMN roamings are limited, for example：Because above-mentioned second circuit domain PLMN does not sign roaming agreement with ownership place PLMN, then the 2nd MSC/VLR sends location updating refuse information to MME, indicate that above-mentioned second circuit domain PLMN roamings are limited, then, MME selects another to be used for the PLMN of circuit domain, it is implemented referring to step 208 ~ step 211, and here is omitted；Otherwise, then the 2nd MSC/VLR execution circuits domain position update flow, that is, perform step 212.
Step 212, the 2nd MSC/VLR and HLR/HSS are interacted, execution circuit domain position update flow (Location Updating procedure in CS domain);
Step 213, the 2nd MSC/VLR send location updating to MME and received（Location Update Accept) message；
Step 214, MME send attachment to UE and received（Attach Accept) message/tracing section updating receiving (Tracking Area Update Accept) message.
The concrete application scene of the present embodiment can be described as follows：PLMN1 is signed with roaming agreement with PLMN2, PLMN4 respectively, and PLMN2 supports CSFB, and can select PLMN4, PLMN5 as the PLMN progress CSFB services for circuit domain.The UE for being signed up in PLMN1 reaches roaming place PLMN2, above-mentioned UE carries out joint attachment in roaming place PLMN2, PLMN2 MME selects PLMN5 as the first circuit domain PLMN in above-mentioned steps 203, because PLMN5 and PLMN1 do not sign roaming agreement, the PLMN5 causes the failure of circuit domain position update flow because roaming is limited, and MME performs above-mentioned steps 207.Now, pass through above-mentioned steps 208, MME have selected another for the PLMN (i.e. PLMN4) of circuit domain as second circuit domain PLMN, because PLMN4 and PLMN1 endorsed roaming agreement, so that follow-up circuit domain position update flow can be with successful execution, so that UE can carry out CSFB services.
In the present embodiment, after the first circuit domain PLMN roamings of the MME according to where the first MSC/VLR of the reception location updating refuse informations sent know the first MSC/VLR is limited, by selecting another PLMN i.e. second circuit domain PLMN and corresponding 2nd MSC/VLR, so as to send location update request message to above-mentioned 2nd MSC/VLR, so that above-mentioned 2nd MSC/VLR execution circuits domain position update flow, it is to avoid caused by the PLMN roamings where the first MSC/VLR are limited UE the failure of circuit domain position update flow is carried out in the PLMN for supporting CSFB and CSFB services can not be carried out, improve service success rate.
Fig. 3 is the schematic flow sheet for another location updating method that the embodiment of the present invention three is provided, and as shown in Fig. 3, the location updating method of the present embodiment may comprise steps of：
The message that step 301, MME are sent according to the HLR/HSS of reception, knows in the presence of at least one roaming PLMN, and therefrom select a roaming PLMN that can be used for circuit domain;
Step 302, above-mentioned MME dispensing positions area mark, above-mentioned Location Area Identification can be used for the roaming PLMN of circuit domain PLMN marks comprising said one；
Step 303, above-mentioned MME select MSC/VLR according to above-mentioned Location Area Identification;
Step 304, above-mentioned MME send location update request message to above-mentioned MSC/VLR, so that above-mentioned MSC/VLR execution circuits domain position update flow.
In the present embodiment, MME is known by the HLR/HSS of the reception message sent there are one or more roaming PLMN after, by selecting one of them to can be used for the roaming PLMN and corresponding MSC/VLR of circuit domain, so as to send location update request message to above-mentioned MSC/VLR, so that above-mentioned MSC/VLR execution circuits domain position update flow, the UE caused by the PLMN roamings where MSC/VLR are limited is avoided to carry out the failure of circuit domain position update flow in the PLMN for supporting CSFB and CSFB services can not be carried out, improve service success rate.
Fig. 4 is the schematic flow sheet for another location updating method that the embodiment of the present invention four is provided, and the present embodiment is a specific embodiment of the invention described above 3rd embodiment.In the present embodiment, PLMN that UE is contracted (either the affiliated PLMN of referred to as UE or be referred to as to possess the PLMN of UE subscription data), hereinafter referred to as ownership place PLMN;PLMN (the either affiliated PLMN of referred to as MME or referred to as MME PLMN) where MME, hereinafter referred to as visited place PLMN.As shown in Fig. 4, the location updating method of the present embodiment may comprise steps of：
Step 401, UE send attach request to MME（Attach Request) message/tracing section updating request (Tracking Area Update Request, abbreviation TAU Request) message, the type of attachment of above-mentioned Attach Request message indicates that it is joint attach request（Combined EPS/IMSI Attach Request), or, the updating type of above-mentioned tracing section updating request message indicates that it is joint tracking area/location area updating request（Combined Tracking Area/Location Area Update Request) or joint tracking area/location area updating and IMSI International Mobile Subscriber Identity attach request（ Combined Tracking Area/Location Area Update with IMSI Attach Request );
Step 402, the part flow for performing packet domain attachment/tracing section updating flow；
Specifically, it may include steps of：
Step 402a, MME sends more new position request to HLR/HSS（Update Location Request) message；
Step 402b, HLR/HSS is sent in insertion subscription data (Insert Subscription Data) message, above-mentioned insertion subscription data message comprising roaming PLMN information to MME；
Wherein, above-mentioned roaming PLMN can be specifically the PLMN that roaming agreement is signed with ownership place PLMN so that UE can carry out business in above-mentioned roaming PLMN（That is services of roaming）.Wherein, above-mentioned roaming PLMN is further referred to as roaming license PLMN, or can also be referred to as ownership place PLMN roaming license PLMN, and the present embodiment is without limitation.
Further, in this step, after HLR/HSS receives renewal location request message, it can also judge whether above-mentioned MME belongs to ownership place PLMN, if knowing, above-mentioned MME belongs to ownership place PLMN, and above-mentioned roaming PLMN information can not be included in the above-mentioned insertion subscription data message sent to MME；If knowing, above-mentioned MME is not belonging to ownership place PLMN, and above-mentioned roaming PLMN information is included in the above-mentioned insertion subscription data message sent to MME.
Wherein, above-mentioned roaming PLMN information can include one or more roaming PLMN PLMN marks.Wherein, the PLMN that the roaming PLMN information included in the above-mentioned insertion subscription data message that HLR/HSS is sent to MME can include part or all of roaming PLMN is identified.Specifically, HLR/HSS can be according to above-mentioned visited place PLMN information（For example：Visited place PLMN PLMN marks；), the roaming PLMN information for including part roaming PLMN marks is sent to MME by above-mentioned insertion subscription data message, wherein, above-mentioned part roaming PLMN can have identical mobile national coding with visited place PLMN（Mobile Country Code, abbreviation MCC), the present embodiment to how root Which it is not limited according to the realization in the above-mentioned roaming PLMN information of visited place PLMN information decisions specifically comprising part roaming PLMN marks.
Step 402c, MME sends insertion subscription data response to HLR/HSS（Insert subscription Data Ack) message；
Step 402d, HLR/HSS sends more new position response to MME（Update Location Ack) message；
Step 403, MME, which select one, is used for the roaming PLMN of circuit domain;
Specifically, MME can be known by the insertion subscription data message received in above-mentioned steps 402b in the presence of at least one roaming PLMN, one of them of above-mentioned above-mentioned at least one roaming PLMN of MME selections, for circuit domain, i.e., above-mentioned MME selects a roaming PLMN that can be used for circuit domain.
Wherein, the roaming PLMN available for the roaming PLMN of packet domain and available for circuit domain is may be simultaneously present at least one roaming PLMN known by above-mentioned MME, the above-mentioned roaming PLMN available for circuit domain that then above-mentioned MME can be known according to it, selects one of them to can be used for the roaming PLMN of circuit domain.Specifically, the above-mentioned roaming PLMN available for circuit domain that above-mentioned MME can be known according to it the and PLMN available for circuit domain that it is known, one PLMN of selection (i.e. said one can be used for the roaming PLMN of circuit domain), wherein it is the above-mentioned roaming PLMN available for circuit domain and satisfaction is the PLMN that can be used for circuit domain that the selected PLMN of above-mentioned MME, which can be met,.
Wherein, the above-mentioned PLMN available for circuit domain can be the user equipment for being signed up in visited place PLMN in attachment flow/TAU flows, MME can select for circuit domain（For example：CSFB is serviced）PLMN.Wherein, above-mentioned MME the modes such as information can be locally configured by MME knows the above-mentioned PLMN available for circuit domain, and the present embodiment is without limitation.
Step 404, MME dispensing positions area mark（Location Area Identity, abbreviation LAI), the said one comprising selection is used for the roaming PLMN of circuit domain PLMN and identified in above-mentioned Location Area Identification；
Step 405, MME select MSC/VLR according to above-mentioned Location Area Identification;
Wherein, above-mentioned MSC/VLR is further referred to as the roaming PLMN's available for circuit domain MSC/VLR, or the roaming PLMN available for circuit domain of MME selections MSC/VLR can also be referred to as.
It should be noted that：The roaming PLMN available for circuit domain of above-mentioned MME selections is further referred to as MSC/VLR PLMN, or the PLMN where MSC/VLR, and the present embodiment is without limitation.
Step 406, MME send position updating request to above-mentioned MSC/VLR（Location Update Request) message；
Step 407, MSC/VLR and HLR/HSS are interacted, execution circuit domain position update flow (Location Updating procedure in CS domain);
Step 408, MSC/VLR send location updating to MME and received（Location Update
Accept) message；
Step 409, MME send attachment to UE and received（Attach Accept) message/tracing section updating receiving (Tracking Area Update Accept) message.
In the present embodiment, MME is known by the HLR/HSS of the reception insertion subscription data message sent there are one or more roaming PLMN after, by selecting one of them to can be used for the roaming PLMN and corresponding MSC/VLR of circuit domain, so as to send location update request message to above-mentioned MSC/VLR, so that above-mentioned MSC/VLR execution circuits domain position update flow, the UE caused by the PLMN roamings where MSC/VLR are limited is avoided to carry out the failure of circuit domain position update flow in the PLMN for supporting CSFB and CSFB services can not be carried out, improve service success rate.
Fig. 5 is the schematic flow sheet for another location updating method that the embodiment of the present invention five is provided, and the present embodiment is another specific embodiment of the invention described above 3rd embodiment.In the present embodiment, PLMN that UE is contracted (either the affiliated PLMN of referred to as UE or be referred to as to possess the PLMN of UE subscription data), hereinafter referred to as ownership place PLMN;PLMN (the either affiliated PLMN of referred to as MME or referred to as MME PLMN) where MME, hereinafter referred to as visited place PLMN.As shown in Fig. 5, the location updating method of the present embodiment may comprise steps of：
Step 501, UE send attach request to MME（Attach Request) message/tracking area is more New request（Tracking Area Update Request, abbreviation TAU Request) message, the type of attachment of above-mentioned Attach Request message indicates that it is joint attach request（Combined EPS/IMSI Attach Request), or, the updating type of above-mentioned tracing section updating request message indicates that it is joint tracking area/location area updating request（Combined Tracking Area/Location Area Update Request) or joint tracking area/location area updating and IMSI International Mobile Subscriber Identity attach request（Combined Tracking Area/Location Area Update with IMSI Attach Request );
Step 502, the part flow for performing packet domain attachment/tracing section updating flow；
Step 503, MME send request message to HLR/HSS, indicate that HLR/HSS issues roaming PLMN information；
Wherein, above-mentioned request message can be the extension of existing a piece of news, for example：Update location request message（Now the step is performed in above-mentioned steps 502；), IMSI attachments are included in above-mentioned renewal location request message（IMSI Attach) indicate, so that HLR/HSS issues roaming PLMN information, the present embodiment does not limit the specific name of the instruction；Or above-mentioned request message can also be a newly-built request message（Now the step can not be performed in above-mentioned steps 502）, for example：Roam PLMN information request messages（Roaming PLMN Information Request Message), the message indicates that HLR/HSS issues roaming PLMN information, and the present embodiment does not limit the specific name of the new information.
Wherein, above-mentioned roaming PLMN can be specifically the PLMN that roaming agreement is signed with ownership place PLMN so that UE can carry out business in above-mentioned roaming PLMN（That is services of roaming）.Wherein, above-mentioned roaming PLMN is further referred to as roaming license PLMN, or can also be referred to as ownership place PLMN roaming license PLMN, and the present embodiment is without limitation.
Further, in this step, MME can also judge whether above-mentioned MME belongs to ownership place PLMN, if knowing, above-mentioned MME belongs to ownership place PLMN, and the step is not performed（It can specifically send and not carry the renewal location request message that above-mentioned IMSI attachments are indicated, or roaming PLMN information request messages etc. can not be sent）；If knowing, above-mentioned MME is not belonging to ownership place PLMN, performs above-mentioned steps 503.
Step 504, HLR/HSS are sent in response message, above-mentioned response message comprising roaming to MME
PLMN information； Wherein, above-mentioned roaming PLMN information can include one or more roaming PLMN PLMN marks.Wherein, the PLMN that the roaming PLMN information included in the response message that HLR/HSS is sent to MME can include part or all of roaming PLMN is identified.Specifically, can be according to above-mentioned visited place PLMN information after HLR/HSS receives request message（For example：Visited place PLMN PLMN marks；), the roaming PLMN information for including part roaming PLMN marks is sent to MME by above-mentioned response message, wherein, above-mentioned part roaming PLMN can have identical mobile national coding with visited place PLMN（Mobile Country Code, abbreviation MCC), how the present embodiment according to the realization in the above-mentioned roaming PLMN information of visited place PLMN information decisions specifically comprising which part roaming PLMN mark to be not limited.
Wherein, above-mentioned response message can be existing a piece of news, for example：Insert subscription data response
(Insert subscription Data Ack) message（Now the step is performed in above-mentioned steps 502）；Or above-mentioned response message can also be a newly-built response message, for example：PLMN info response messages (Roaming PLMN Information Response Message) are roamed, the present embodiment does not limit the specific name of the new information.
Step 505, MME, which select one, is used for the roaming PLMN of circuit domain;
Specifically, MME can be known in the presence of at least one roaming PLMN by receiving the response message in above-mentioned steps 504, one of them of above-mentioned above-mentioned at least one roaming PLMN of MME selections, for circuit domain, i.e., above-mentioned MME selects a roaming PLMN that can be used for circuit domain.
Wherein, the roaming PLMN available for the roaming PLMN of packet domain and available for circuit domain is may be simultaneously present at least one roaming PLMN known by above-mentioned MME, the above-mentioned roaming PLMN available for circuit domain that then above-mentioned MME can be known according to it, selects one of them to can be used for the roaming PLMN of circuit domain.Specifically, the above-mentioned roaming PLMN available for circuit domain that above-mentioned MME can be known according to it the and PLMN available for circuit domain that it is known, one PLMN of selection (i.e. said one can be used for the roaming PLMN of circuit domain), wherein it is the above-mentioned roaming PLMN available for circuit domain and satisfaction is the PLMN that can be used for circuit domain that the selected PLMN of above-mentioned MME, which can be met,.
Wherein, the above-mentioned PLMN available for circuit domain can be in attachment flow/TAU flows, it is right In the user equipment for being signed up in visited place PLMN, MME can select for circuit domain（For example：CSFB is serviced）PLMN.Wherein, above-mentioned MME the modes such as information can be locally configured by MME knows the above-mentioned PLMN available for circuit domain, and the present embodiment is without limitation.
Step 506, MME dispensing positions area mark（Location Area Identity, abbreviation LAI), the said one comprising selection is used for the roaming PLMN of circuit domain PLMN and identified in above-mentioned Location Area Identification；
Step 507, MME select MSC/VLR according to above-mentioned Location Area Identification;
Wherein, above-mentioned MSC/VLR is further referred to as the MSC/VLR of the roaming PLMN available for circuit domain, or can also be referred to as the roaming PLMN available for circuit domain of MME selections MSC/VLR.
It should be noted that：The roaming PLMN available for circuit domain of above-mentioned MME selections is further referred to as MSC/VLR PLMN, or the PLMN where MSC/VLR, and the present embodiment is without limitation.
Step 508, MME send position updating request to above-mentioned MSC/VLR（Location Update Request) message；
Step 509, MSC/VLR and HLR/HSS are interacted, execution circuit domain position update flow (Location Updating procedure in CS domain);
Step 510, MSC/VLR send location updating to MME and received（Location Update Accept) message；
Step 511, MME send attachment to UE and received（Attach Accept) message/tracing section updating receiving (Tracking Area Update Accept) message.
In the present embodiment, MME is known by the HLR/HSS of the reception response message sent there are one or more roaming PLMN after, by selecting one of them to can be used for the roaming PLMN and corresponding MSC/VLR of circuit domain, so as to send location update request message to above-mentioned MSC/VLR, so that above-mentioned MSC/VLR execution circuits domain position update flow, it is to avoid due to where MSC/VLR
PLMN roamings are limited caused UE and circuit domain location updating are carried out in the PLMN for supporting CSFB Flow fails and can not carry out CSFB services, improves service success rate.
Fig. 6 is the schematic flow sheet for another location updating method that the embodiment of the present invention six is provided, and as shown in Fig. 6, the location updating method of the present embodiment may comprise steps of：
Step 601, target MME know the circuit domain PLMN that source MME has been selected;
Wherein, the circuit domain PLMN that above-mentioned source MME has been selected is specifically as follows in the circuit domain position update flow before performing the present embodiment flow, the PLMN for circuit domain chosen source MME.Before the present embodiment is performed, the circuit domain PLMN information that source MME has been selected is stored in the MME of source.Specifically, in the circuit domain position update flow before performing the present embodiment, above-mentioned source MME is after location updating received message is received, the PLMN for circuit domain of its selection can be stored, so that target MME can know the circuit domain PLMN that source MME has been selected from source MME in the flow for performing the present embodiment.
Wherein, above-mentioned target MME can also be referred to as new MME (new MME), and above-mentioned source MME can also be referred to as old MME (old MME), and the present embodiment is without limitation.
Step 602, above-mentioned target MME selection foregoing circuits domain PLMN;
Step 603, above-mentioned target MME dispensing positions area mark, PLMN mark i of the above-mentioned Location Area Identification comprising foregoing circuit domain PLMN is only；
Step 604, above-mentioned target MME select MSC/VLR according to above-mentioned Location Area Identification;
Step 605, above-mentioned target MME send location update request message to above-mentioned MSC/VLR, so that above-mentioned MSC/VLR execution circuits domain position update flow.
In the present embodiment, target MME knows the circuit domain PLMN that source MME has been selected, pass through the circuit domain PLMN and corresponding MSC/VLR for selecting above-mentioned source MME to select, so as to send location update request message to above-mentioned MSC/VLR, so that MSC/VLR execution circuits domain position update flow, avoid the UE caused by the PLMN roamings where MSC/VLR are limited to carry out the failure of circuit domain position update flow in the PLMN for supporting CSFB and CSFB services can not be carried out, improve service success rate.
Fig. 7 is the schematic flow sheet for another location updating method that the embodiment of the present invention seven is provided, this implementation Example is the specific embodiment of a upper embodiment.As shown in Fig. 7, the location updating method of the present embodiment may comprise steps of：
Step 701, UE send attach request (Attach Request) message/tracing section updating to target MME and ask (Tracking Area Update Request, abbreviation TAU Request) message, the type of attachment of above-mentioned Attach Request message indicates that it is joint attach request（Combined EPS/IMSI Attach Request), or, the updating type of above-mentioned tracing section updating request message indicates that it is the blunt track area/location of joint and updates request (Combined Tracking Area/Location Area Update Request) or joint tracking area/location area updating and IMSI International Mobile Subscriber Identity attach request (Combined Tracking Area/Location Area Update with IMSI Attach Request);
Step 702, the part flow for performing packet domain attachment/tracing section updating flow；
Specifically, it may include steps of：
Step 702a, target MME send context request to source MME（Context Request) disappear certainly
Step 702b, source MME send context response to target MME（Context Response) message, circuit domain PLMN (the Selected PLMN Information for CS domain) information selected is included in above-mentioned context response information；
Step 703, target MME select the circuit domain PLMN that above-mentioned source MME has been selected;
Specifically, target MME can know the circuit domain PLMN that above-mentioned source MME has been selected by receiving the context response information in above-mentioned steps 702b, and above-mentioned MME selects the above-mentioned circuit domain PLMN selected, for circuit domain.
Step 704, target MME dispensing positions area mark（Location Area Identity, abbreviation LAI), the PLMN marks for the circuit domain PLMN that the above-mentioned source MME comprising selection has been selected in above-mentioned Location Area Identification；
Step 705, target MME select MSC/VLR according to above-mentioned Location Area Identification;
Wherein Or the circuit domain PLMN selected of target MME selections MSC/VLR can also be referred to as.It should be noted that：The circuit domain PLMN selected of above-mentioned target MME selections is further referred to as MSC/VLR PLMN, or the PLMN where MSC/VLR, and the present embodiment is without limitation.
Step 706, target MME send position updating request to above-mentioned MSC/VLR（ Location
Update Request) message；
Step 707, MSC/VLR and HLR/HSS are interacted, execution circuit domain position update flow (Location Updating procedure in CS domain);
Step 708, MSC/VLR send location updating to target MME and received（Location Update Accept) message；
Step 709, target MME send attachment to UE and received（Attach Accept) message/tracing section updating receiving（Tracking Area Update Accept) message.
In the present embodiment, target MME knows the circuit domain PLMN that source MME has been selected, pass through the circuit domain PLMN and corresponding MSC/VLR for selecting above-mentioned source MME to select, so as to send location update request message to above-mentioned MSC/VLR, so that MSC/VLR execution circuits domain position update flow, avoid the UE caused by the PLMN roamings where MSC/VLR are limited to carry out the failure of circuit domain position update flow in the PLMN for supporting CSFB and CSFB services can not be carried out, improve service success rate.
It should be noted that：For foregoing each method embodiment, in order to be briefly described, therefore it is all expressed as to a series of combination of actions, but those skilled in the art should know, the present invention is not limited by described sequence of movement, because according to the present invention, some steps can be carried out sequentially or simultaneously using other.Secondly, those skilled in the art should also know, embodiment described in this description belongs to preferred embodiment, and involved action and the module not necessarily present invention are necessary.
In the above-described embodiments, the description to each embodiment all emphasizes particularly on different fields, and does not have the part being described in detail in some embodiment, may refer to the associated description of other embodiment.
Fig. 8 is a kind of structural representation for mobility management entity that the embodiment of the present invention eight is provided, such as Fig. 8 Shown, the mobility management entity of the present embodiment can include knowing module 81, first choice module 82, distribute module 83, the second selecting module 84 and request module 85.Wherein, know the location updating refuse information that module 81 is sent according to the first MSC/VLR of reception, the first circuit domain PLMN roamings where knowing above-mentioned first MSC/VLR are limited, the selection second circuit of first choice module 82 domain PLMN, the dispensing position area of distribute module 83 is identified, the PLMN marks for the above-mentioned second circuit domain PLMN that above-mentioned Location Area Identification is selected comprising first choice module 82, the above-mentioned Location Area Identification that second selecting module 84 is distributed according to distribute module 83, select the 2nd MSC/VLR, above-mentioned 2nd MSC/VLR that request module 85 is selected to the second selecting module 84 sends location update request message, so that above-mentioned 2nd MSC/VLR execution circuits domain position update flow.
The mobility management entity that MME function can be provided by the present embodiment in MME, the embodiment of the present invention two in the embodiments of the present invention one is realized.
Specifically, module 81 specifically can be by receiving the location updating refuse information comprising cause value that the first MSC/VLR is returned for knowing in the present embodiment, the reason in above-mentioned location updating refuse information, value can indicate that above-mentioned first circuit domain PLMN roamings are limited, and the first circuit domain PLMN roamings where knowing above-mentioned first MSC/VLR are limited.
In the present embodiment, after knowing that the first circuit domain PLMN roamings of the module according to where the first MSC/VLR of the reception location updating refuse informations sent know the first MSC/VLR is limited, another PLMN i.e. second circuit domain PLMN and the second selecting module is selected to select corresponding 2nd MSC/VLR by first choice module, so that request module can send location update request message to above-mentioned 2nd MSC/VLR, so that above-mentioned 2nd MSC/VLR execution circuits domain position update flow, the UE caused by the PLMN roamings where the first MSC/VLR are limited is avoided to carry out the failure of circuit domain position update flow in the PLMN for supporting CSFB and CSFB services can not be carried out, improve service success rate.
Fig. 9 is the structural representation for another mobility management entity that the embodiment of the present invention nine is provided, as shown in figure 9, the mobility management entity of the present embodiment can include first choice module 91, distribute module 92, the second selecting module 93 and request module 94.Wherein, the message that first choice module 91 is sent according to the HLR/HSS of reception, knows that selection one can use in the presence of at least one roaming PLMN, and therefrom In the roaming PLMN of circuit domain, the dispensing position area of distribute module 92 is identified, above-mentioned Location Area Identification can be used for the roaming PLMN of circuit domain PLMN marks comprising the said one that first choice module 91 is selected, the above-mentioned Location Area Identification that second selecting module 93 is distributed according to distribute module 92, select MSC/VLR, the above-mentioned MSC/VLR that request module 94 is selected to the second selecting module 93 sends location update request message, so that above-mentioned MSC/VLR execution circuits domain position update flow.
The mobility management entity that MME function can be provided by the present embodiment in MME, the embodiment of the present invention five in MME, the embodiment of the present invention four in the embodiments of the present invention three is realized.
Specifically, first choice module 91 in the present embodiment specifically can update location request message by being sent to HLR/HSS, and receive the insertion subscription data message that above-mentioned HLR/HSS is returned according to above-mentioned renewal location request message, comprising roaming PLMN information in above-mentioned insertion subscription data message, know in the presence of at least one roaming PLMN;Or can also be by sending request message to HLR/HSS, indicate that above-mentioned HLR/HSS issues roaming PLMN information, and receive the response message that above-mentioned HLR/HSS is returned according to above-mentioned request message, comprising roaming PLMN information in above-mentioned response message, know in the presence of at least one roaming PLMN.
In the present embodiment, first choice module is known by the HLR/HSS of the reception message sent there are one or more roaming PLMN after, by selecting one of them to can be used for the roaming PLMN and the second selecting module of circuit domain to select corresponding MSC/VLR, so that request module can send location update request message to above-mentioned MSC/VLR, so that above-mentioned MSC/VLR execution circuits domain position update flow, the UE caused by the PLMN roamings where MSC/VLR are limited is avoided to carry out the failure of circuit domain position update flow in the PLMN for supporting CSFB and CSFB services can not be carried out, improve service success rate.
Figure 10 is the structural representation for another mobility management entity that the embodiment of the present invention ten is provided, as shown in Figure 10, the mobility management entity of the present embodiment can include knowing module 1001, first choice module 1002, distribute module 1003, the second selecting module 1004 and request module 1005.Wherein, know that module 1001 knows the circuit domain PLMN that source MME has been selected, the foregoing circuit domain PLMN that module 1001 is known is known in the selection of first choice module 1002, and the dispensing position area of distribute module 1003 is identified, The PLMN marks for the foregoing circuit domain PLMN that above-mentioned Location Area Identification is selected comprising first choice module 1002, the above-mentioned Location Area Identification that second selecting module 1004 is distributed according to distribute module 1003, select MSC/VLR, the above-mentioned MSC/VLR that request module 1005 is selected to the second selecting module 1004 sends location update request message, so that above-mentioned MSC/VLR execution circuits domain position update flow.
The mobility management entity that MME function can be provided by the present embodiment in MME, the embodiment of the present invention seven in the embodiments of the present invention six is realized.
Specifically, in the present embodiment, know that module 1001 specifically can be by sending context request message to source MME, and receive the context response information that above-mentioned source MME is returned according to above-mentioned context request message, comprising the circuit domain PLMN information selected in above-mentioned context response information, the circuit domain PLMN that source MME has been selected is known.
In the present embodiment, know that module knows the circuit domain PLMN that source MME has been selected, the circuit domain PLMN and the corresponding MSC/VLR of the second selecting module selection that above-mentioned source MME has been selected are selected by first choice module, so that request module can send location update request message to above-mentioned MSC/VLR, so that MSC/VLR execution circuits domain position update flow, the UE caused by the PLMN roamings where MSC/VLR are limited is avoided to carry out the failure of circuit domain position update flow in the PLMN for supporting CSFB and CSFB services can not be carried out, improve service success rate.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above method embodiment can be completed by the related hardware of programmed instruction, foregoing program can be stored in a computer read/write memory medium, the program upon execution, performs the step of including above method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or CD etc. are various can be with the medium of store program codes.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although the present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It can still modify to the technical scheme described in foregoing embodiments, or carry out equivalent substitution to which part technical characteristic；And these modifications or replacement, the essence of correspondence technical scheme is departed from the spirit and scope of various embodiments of the present invention technical scheme.

Claims (1)

  1. Claim
    1st, a kind of location updating method, it is characterised in that including：
    The location updating refuse information that MME is sent according to the first MSC/VLR of reception, the first circuit domain PLMN roamings where knowing the first MSC/VLR are limited；
    The MME selection second circuits domain PLMN;
    The MME dispensing positions area mark, PLMN of the Location Area Identification comprising the second circuit domain PLMN is identified；
    The MME selects the 2nd MSC/VLR according to the Location Area Identification;
    The MME sends location update request message to the 2nd MSC/VLR, so that the 2nd MSC/VLR execution circuits domain position update flow.
    2nd, the method according to claim 1, it is characterised in that the first circuit domain PLMN roamings known where the first MSC/VLR are limited to be included：
    The MME receives the location updating refuse information comprising cause value that the first MSC/VLR is returned, and knows that the first circuit domain PLMN roamings are limited.
    3rd, a kind of location updating method, it is characterised in that including：
    The message that MM E are sent according to the HLR/HSS of reception, knows in the presence of at least one roaming PLMN, and therefrom select a roaming PLMN that can be used for circuit domain;
    The MME dispensing positions area mark, PLMN of the Location Area Identification comprising one roaming PLMN available for circuit domain is identified；
    The MME selects MSC/VLR according to the Location Area Identification;
    The MME sends location update request message to the MSC/VLR, so that the MSC/VLR execution circuits domain position update flow.
    4th, method according to claim 3, it is characterised in that the message that the MME is sent according to the HLR/HSS of reception, know includes in the presence of at least one roaming PLMN：
    The MME is sent to HLR/HSS updates location request message, and receives the insertion subscription data message that the HLR/HSS is returned according to the renewal location request message, the insertion subscription data message In comprising roaming PLMN information；Or
    The MME sends request message to HLR/HSS, indicates that the HLR/HSS issues roaming PLMN information, and receive in the response message that the HLR/HSS is returned according to the request message, the response message comprising roaming PLMN information.
    5th, a kind of location updating method, it is characterised in that including：
    Target MME obtains the circuit domain PLMN that ^^ sources MME has been selected;
    The target MME selects the circuit domain PLMN;
    The target MME dispensing positions area mark, PLMN of the Location Area Identification comprising the circuit domain PLMN is identified；
    The target MME selects MSC/VLR according to the Location Area Identification;
    The target MME sends location update request message to the MSC/VLR, so that the MSC/VLR execution circuits domain position update flow.
    6th, method according to claim 5, it is characterised in that the target MME knows that the circuit domain PLMN that source MME has been selected includes：
    The MME sends in context request message, and the context response information that the reception source MME is returned according to the context request message, the context response information to source MME and includes the circuit domain PLMN information selected.
    7th, a kind of mobility management entity, it is characterised in that including：
    Know module, for the location updating refuse information sent according to the first MSC/VLR of reception, the first circuit domain PLMN roamings where knowing the first MSC/VLR are limited；
    First choice module, for selecting second circuit domain PLMN;
    Distribute module, for dispensing position area mark, PLMN of the Location Area Identification comprising the second circuit domain PLMN is identified；
    Second selecting module, for according to the Location Area Identification, selecting the 2nd MSC/VLR;
    Request module, for sending location update request message to the 2nd MSC/VLR, so that the 2nd MSC/VLR execution circuits domain position update flow. 8th, mobility management entity according to claim 7, it is characterised in that described to know that module, specifically for receiving the location updating refuse information comprising cause value that the first MSC/VLR is returned, knows that the first circuit domain PLMN roamings are limited.
    9th, a kind of mobility management entity, it is characterised in that including：
    First choice module, for the message sent according to the HLR/HSS of reception, knows in the presence of at least one roaming PLMN, and therefrom select a roaming PLMN that can be used for circuit domain;
    Distribute module, for dispensing position area mark, PLMN of the Location Area Identification comprising one roaming PLMN available for circuit domain is identified；
    Second selecting module, for according to the Location Area Identification, selecting MSC/VLR;
    Request module, for sending location update request message to the MSC/VLR, so that described
    MSC/VLR execution circuits domain position update flow.
    10th, mobility management entity according to claim 9, it is characterised in that the first choice module specifically for
    Sent to HLR/HSS and update location request message, and receive the HLR/HSS and updated according to described in the insertion subscription data message that location request message is returned, the insertion subscription data message comprising roaming PLMN information；Or
    Request message is sent to HLR/HSS, indicates that the HLR/HSS issues roaming PLMN information, and receive in the response message that the HLR/HSS is returned according to the request message, the response message comprising roaming PLMN information.
    11st, a kind of mobility management entity, it is characterised in that including：
    Module is known, for knowing the circuit domain PLMN that source MME has been selected;
    First choice module, for selecting the circuit domain PLMN;
    Distribute module, for dispensing position area mark, PLMN of the Location Area Identification comprising the circuit domain PLMN is identified；
    Second selecting module, for according to the Location Area Identification, selecting MSC/VLR;
    Request module, for sending location update request message to the MSC/VLR, so that described MSC/VLR execution circuits domain position update flow.
    12nd, mobility management entity according to claim 11, it is characterised in that it is described know module specifically for
    Sent to source MME in context request message, and the context response information that the reception source MME is returned according to the context request message, the context response information and include the circuit domain PLMN information selected.
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Application publication date: 20131009