CN109996311A - A kind of speech called area selecting method of long term evolution and related network elements - Google Patents
A kind of speech called area selecting method of long term evolution and related network elements Download PDFInfo
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- CN109996311A CN109996311A CN201711479688.6A CN201711479688A CN109996311A CN 109996311 A CN109996311 A CN 109996311A CN 201711479688 A CN201711479688 A CN 201711479688A CN 109996311 A CN109996311 A CN 109996311A
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- network state
- called subscriber
- called
- network
- mme
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/17—Selecting a data network PoA [Point of Attachment]
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- 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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
Abstract
The present invention provides a kind of speech called area selecting method of long term evolution and related network elements, this method comprises: receiving updating network state instruction, the value for determining network state position is instructed according to updating network state, network state position indicates whether called subscriber registers in MME；T-ADS information is received, whether SRVCC function and the T-ADS information are supported according to the value of network state position, called user terminal, determines the access network of called subscriber.The present invention is after called subscriber registers or nullifies, and MME can send updating network state instruction to HSS, and to notify the network state of HSS called subscriber, therefore HSS understand that called subscriber's real-time network state, ensure that HSS obtains the accuracy of data.Secondly, passing through the network state position for indicating user's real-time network state in HSS, it is no longer necessary to which mutually looking into and HSS is to the process of MME searching user's information between three fusion HSS/HLR simplifies domain and select process, improve domain and select efficiency.
Description
Technical field
The present invention relates to mobile communication field, more particularly, to a kind of long term evolution (Long Term Evolution,
Abbreviation LTE) voice (Voice over LTE, abbreviation VoLTE) is called area selecting method and related network elements.
Background technique
Currently, more and more users are conversed using VoLTE with the promotion and popularization of high definition voice, VoLTE is logical
It is more to talk about scene, due to being related to circuit switching (Circuit Switched, abbreviation CS) and IP multimedia subsystem
(IPMultimedia Subsystem, abbreviation IMS) intercommunication problem, and due to home signature user server (Home
Subscriber Server, abbreviation HSS) do not know that called number is in CS network or packet switch (Packet
Switch, abbreviation PS) network, therefore it is IMS centralized traffic (IMS Centralized Services, letter that VoLTE, which is called scheme,
Claim ICS) it is called anchoring scheme.
When having registered the user of VoLTE as called subscriber, caller side gusset always routes to called ownership for called
IMS network, carries out called domain selection by IMS network, i.e., determines to be called by called IMS network be in CS network or IMS network,
During called domain selection function (Terminated Access Domain Selection, abbreviation T-ADS), if with
After VoLTE is nullified at family, still retain on mobile management entity (Mobility Management Entity, abbreviation MME) useful
User data.
Existing VoLTE is called scheme specifically: when VoLTE user is called, had both been likely to reside in timesharing and has drilled for a long time
Into (Time Division Long Term Evolution, abbreviation TD-LTE) network, block core (Evolved Packet
Core, abbreviation EPC) network, IMS network, it is also possible to reside in the second generation/3rd generation mobile communication technology (Second/
Third Generation, abbreviation 2/3G) network.After switching to VoLTE user due to China Mobile user, it is changed without MSISDN
(Mobile Subscriber International ISDN/PSTN number) phone number, i.e. VoLTE user and 2/3G
User uses MSISDN phone number with, and therefore, Originating Office can not determine subsequent voice calls road according only to called MS ISDN phone number
By.Need to introduce " the called anchoring of VoLTE " and " VoLTE is called domain selection " operation flow.
Existing VoLTE is called domain selection scheme specifically: the service call conversation control function of VoLTE called subscriber
(Service Call Session Control Function, abbreviation S-CSCF) by call request triggers to service set and
Application server for continuity (Service Centralization and Continuity Application Server, letter
Claim SCC AS), SCC AS passes through sh interface to three anastomosing home assigned user server of user attaching/home location register
(abbreviation HSS/HLR) requests T-ADS information and user in circuit domain routing number (the Circuit Switch of circuit domain
Routing Number, abbreviation CSRN).
Three fusion HSS/HLR execute domain selection course, judge user in Serving GPRS Support Node (Serving GPRS
Support Node, abbreviation SGSN) and MME login state:
If there is user in the registration information of SGSN, no matter whether user registers in MME, then should select the domain CS, three fusions
HSS/HLR returns to IMS Voice Over PS=Not Supported to SCC AS.
If no user has user in the registration information of MME in the registration information of SGSN, then User Status is inquired to MME
And terminal capability, if having user's registration information and terminal support injection frequency continuous voice call (Single Radio in MME
Voice Call Continuity, abbreviation SRVCC), then IMS domain should be selected, three fusion HSS/HLR return to IMS to SCC AS
Voice Over PS=Supported, RAT TYPE=E-UTRAN.
If MME no user registration information, the domain CS should be selected, three fusion HSS/HLR return to IMS Voice to SCC AS
Over PS=Not Supported.
If no user is in the registration information of SGSN, also registration information of the no user in MME, it may be possible to which user is closed in circuit domain
All access points (Access Point Name, abbreviation APN) has been closed, then should select the domain CS, three merge HSS/HLR to SCC AS
Return to IMS Voice Over PS=Not Supported.
SCC AS is according to three fusion HSS/HLR returns as a result, executing following subsequent operation:
If three fusion HSS/HLR return to IMS Voice Over PS=Not Supported, SCC AS to SCC AS
Continue to three fusion HSS/HLR request CSRN numbers, the MSC that three fusion HSS/HLR are currently visited to called subscriber asks for movement
After platform roaming number (Mobile Station Roaming Number, abbreviation MSRN) number, SCC AS is returned to, then SCC
AS is by the unified resource mark of the request in session initiation protocol (Session Initiation Protocol, abbreviation SIP) message
Know symbol (Request uniform resource identifier, abbreviation Request URI) and replaces with three fusion HSS/HLR
The CSRN of return, and increase feature-caps header field information, indicate that this calling is " ICS " calling, return to S-CSCF.
If three fusion HSS/HLR return to IMS Voice Over PS=Supported, RAT TYPE=E- to SCC AS
UTRAN, then the Request URI in sip message is maintained as the SIP URI of called subscriber by SCC AS, returns to S-CSCF.
The SIP signaling message that S-CSCF is returned according to SCC AS, carries out subsequent routing.
Fig. 1 is the signaling process figure selected in the prior art by IMS domain as called domain, as shown in Figure 1, normal in terminal
In the case where being registered in IMS and EPC, IMS domain selects process as follows as called domain:
Step 1: after S-CSCF has received called message, SCP AS is sent a message to.
Step 2: SCP AS sends T-ADS query messages to HSS.
Step 3: HSS inquires this user to home location register (Home Location Register, abbreviation HLR)
Whether there is the address SGSN, and confirms that terminal capability, location information etc. all do not have the address SGSN, and nothing as HSS to MME simultaneously
Line access style is fourth generation mobile communication technology (the 4th Generation mobile communication
Technology, abbreviation 4G), terminal SRVCC ability is when supporting, to return to the confirmation message that T-ADS is true.
Step 4: SCC AS requests T-ADS, and the information that HSS is obtained before, after returning to message, IMS system domain is chosen
PS initiates volte call.
Fig. 2 is the signaling process figure selected in the prior art by the domain CS as called domain, as shown in Fig. 2, when terminal is closed
VoLTE function, such as do not register in IMS, without activation IMS PDN on EPC, but user has activated other one
Cmnet carrying or terminal directly close data network, i.e. user does not register in PS core net, when being called, terminal
The process that CS network is chosen in domain is as follows:
Step 1: after S-CSCF has received called message, SCP AS is sent a message to.
Step 2: SCP AS sends T-ADS query messages HSS and location information to HSS.
Step 3: HSS inquires whether this user has the address SGSN to HLR, and confirms terminal capability, position to MME simultaneously
Information etc. does not all have the address SGSN as HSS, and wireless access type is 4G, and terminal SRVCC ability is when supporting, to return
T-ADS is the confirmation message of true, and MME will return to the current location of user terminal (User Equipment, abbreviation UE), and work as UE
When closing data network, MME by return UE deregistration before location information.
Step 4: SCC AS requests STN-SR, HSS to return to the STN-SR before user goes to register.
Step 5: TAS requests complete user data.
Step 6: SCC AS is according to obtained message, it is known that user requests CSRN not in IMS registration, uses
It selects to CS in family domain.
Process is selected by above-mentioned domain it is found that VoLTE in the prior art is called domain selection and called domain anchoring scheme, each
When domain is selected, HSS requires inquiry HLR and MME, whether has number of users to determine user whether to arrive on 2/3G and MME
According to after user nullifies from MME, according to third generation partner program (Third Generation Partnership
Project, abbreviation 3GPP) specification, MME is not notified that HSS, and MME still can retain user data for a period of time, different
Producer's reservation data time is not also identical, and within this time, when HSS to MME inquires user data, MME can return to number of users
According to, make HSS obtain mistake information.
Summary of the invention
The present invention provides a kind of a kind of long term evolution language for overcoming the above problem or at least being partially solved the above problem
Sound is called area selecting method.
According to the first aspect of the invention, a kind of speech called area selecting method of long term evolution is provided, comprising: receive net
Network state more new command, the value for determining network state position is instructed according to the updating network state, and the network state position indicates
Whether called subscriber registers in MME；Receive T-ADS information, according to the value of the network state position, called user terminal whether
It supports SRVCC function and the T-ADS information, determines the access network of the called subscriber.
Preferably, described that whether SRVCC function and described is supported according to the value of the network state position, called user terminal
T-ADS information determines the access network of the called subscriber, specifically includes: if the network state position indicates the called use
Family is not registered in MME, and the called user terminal does not support SRVCC function, it is determined that the access net of the called subscriber
Network is CS；If the network state position indicates that the called subscriber is registered in MME, and the called user terminal is supported
SRVCC function, and the wireless access type of called subscriber described in the T-ADS information is 4G, it is determined that the called subscriber
Access network be IMS.
According to the second aspect of the invention, a kind of speech called area selecting method of long term evolution is provided, comprising: if detection
It is being locally registered or the called subscriber is in local cancellation to called subscriber, updating network state instruction is being sent, so that HSS
The updating network state instruction is received, the value for determining network state position is instructed according to the updating network state, and according to institute
State the value of network state position, whether called user terminal supports SRVCC function and the T-ADS information, determine the called use
The access network at family.
Preferably, described that whether SRVCC function and described is supported according to the value of the network state position, called user terminal
T-ADS information determines the access network of the called subscriber, specifically includes: if the network state position indicates the called use
Family be not locally registered, and the called user terminal does not support SRVCC function, it is determined that the access network of the called subscriber
For CS；If the network state position indicates that the called subscriber is registered in local, and the called user terminal supports SRVCC
Function, and the wireless access type of called subscriber described in the T-ADS information is 4G, it is determined that the access of the called subscriber
Network is IMS.
According to the third aspect of the present invention, a kind of HSS network element is provided, comprising: network module, for receiving network state
More new command, the value for determining network state position is instructed according to the updating network state, and the network state position indicates called and uses
Whether registered in MME at family；Domain modeling block, for receiving T-ADS information, according to the value of the network state position, called subscriber
Whether terminal supports SRVCC function and the T-ADS information, determines the access network of the called subscriber.
Preferably, the domain modeling block specifically includes: if the network state position indicates the called subscriber not in MME
Registration, and the called user terminal does not support SRVCC function, it is determined that the access network of the called subscriber is CS；If institute
Stating network state position indicates that the called subscriber is registered in MME, and the called user terminal supports SRVCC function, and
The wireless access type of called subscriber described in the T-ADS information is 4G, it is determined that the access network of the called subscriber is
IMS。
According to the fourth aspect of the present invention, a kind of MME network element is provided, comprising: detection module, if called for detecting
User is being locally registered or the called subscriber is in local cancellation, updating network state instruction is sent, so that HSS receives institute
Updating network state instruction is stated, the value for determining network state position is instructed according to the updating network state, and according to the network
Whether the value of mode bit, called user terminal support SRVCC function and the T-ADS information, determine connecing for the called subscriber
Enter network.
Preferably, the detection module specifically includes: if the network state position indicates the called subscriber not in local
Registration, and the called user terminal does not support SRVCC function, it is determined that the access network of the called subscriber is CS；If institute
Stating network state position indicates that the called subscriber is registered in local, and the called user terminal supports SRVCC function, and institute
The wireless access type for stating called subscriber described in T-ADS information is 4G, it is determined that the access network of the called subscriber is
IMS。
According to the fifth aspect of the present invention, a kind of computer program product is provided, the computer program product includes
The computer program being stored in non-transient computer readable storage medium, the computer program include program instruction, work as institute
When stating program instruction and being computer-executed, the computer is made to execute a kind of speech called area selecting method of long term evolution.
According to the sixth aspect of the invention, a kind of non-transient computer readable storage medium, the non-transient meter are provided
Calculation machine readable storage medium storing program for executing stores computer instruction, and the computer instruction makes the computer execute a kind of long term evolution voice
Called area selecting method.
The present invention proposes a kind of speech called area selecting method of long term evolution and related network elements, registers or infuses in called subscriber
After pin, MME can send updating network state instruction to HSS, and to notify the network state of HSS called subscriber, therefore HSS can
Know called subscriber's real-time network state, ensure that HSS obtains the accuracy of data.Secondly, by indicating that user is real in HSS
When network state network state position, it is no longer necessary to three fusion HSS/HLR between mutually looking into and HSS to MME inquiry user letter
The process of breath simplifies domain and selects process, improves domain and selects efficiency.
Detailed description of the invention
Fig. 1 is the signaling process figure selected in the prior art by IMS domain as called domain；
Fig. 2 is the signaling process figure selected in the prior art by the domain CS as called domain；
Fig. 3 is the signaling process figure that user registers to MME in the prior art；
Fig. 4 is that UE initiates the signaling process figure nullified in the prior art；
Fig. 5 is the signaling process figure for the user log off that MME is initiated in the prior art；
Fig. 6 is the signaling process figure for the cancellation that HSS is initiated in the prior art；
A kind of flow chart of the speech called area selecting method of long term evolution of Fig. 7 embodiment of the present invention；
Fig. 8 is a kind of flow chart of the speech called area selecting method of long term evolution of further embodiment of this invention；
Fig. 9 is a kind of signaling diagram of the speech called area selecting method of long term evolution of the embodiment of the present invention；
Figure 10 is a kind of structural schematic diagram of HSS network element of another embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
What makes domain select? it, can under the covering of different signal strengths due to supporting that the UE of VoLTE can be there are many mode
To be attached to different networks, it is such as attached to 2G, 3G network sometimes, is attached to LTE network sometimes, it might even be possible to be attached to simultaneously
Two networks.Therefore, support the UE of VoLTE will select to access one of network in calling to converse, selection connects
The process for entering network just makes domain select.
When as caller, domain choosing is completed according to the registered network information of preservation by UE；As it is called when, inquired by network side
Customer data base obtains registered network information and completes domain choosing.
Fig. 3 is the signaling process figure that user registers to MME in the prior art, as shown in figure 3, the specific mistake registered to MME
Journey are as follows:
1, UE sends attach request to Enodeb.
2, Attach Request message is sent MME by Enodeb.
3, MME finds old MME according to the guti carried in attach message, asks for user's IMSI data etc..
If what 4, user carried is that can not find the context of user in attach old MME that IMSI is carried out
Deng MME asks for IMSI to user.
If 5, user carries out encrypted authentication without carrying out encrypted authentication between MME between MME and user.
If when UE tells MME to need to ask for APN to oneself, MME asks for apn to UE 6, when attach.
7, if the session carrying for having this user active on MME, MME first deletes this session
It removes.
8, MME carries out location update message to HSS.
9, HSS sends cancel location (if this is to switch from old MME) to old SGSN.
10, Old MME deletes the carrying of this user to original sgw and PGW.
11, HSS is updated successfully to new MME response position.
12, NewMME initiates carrying to SGW and establishes request.
13, SGW establishes carrying to PGW and establishes request.
14, the session session of this user is established between PGW and PCRF.
15, PGW returns to carrying to SGW and is successfully established message.
16, SGW returns to carrying to MME and establishes message.
17, MME sends carrying radio resource to enodeb and establishes request, and sends attachment received message to user.
18, RRC reconstruction is carried out between Enodeb and user.
19, user returns and rebuilds successfully.
20, Enodeb responds MME radio resource and is successfully established.
21, UE sends diect transfer message to ENODEB, contains attach complete message in message.
22, attach complete message is sent MME by Enodeb.
23, MME carries out bearing modification request to SGW and PGW.
24, SGW returns to bearing modification success message.
25, MME is only that address is inconsistent or subscription data shows that user can be with for static address and actual use in GW
When handover is to non-3gpp network, notify request can be just initiated.
26, HSS returns to notify response.
MME only GW be static address and actual use address it is inconsistent in the case where or subscription data show
When user can be switched to non-3 GPP network, Cai Huixiang HSS initiate notify request, thus inform HSS user whether
It is registered in MME.
Fig. 4 is that UE initiates the signaling process figure nullified in the prior art, as shown in figure 4, specific implementation procedure is as follows:
1, UE initiates separation, sends Detach Request message to MME.
2, after MME receives Detach Request, Delete Session Request is sent to Serving GW and (is deleted
Except carrying is requested) message.
If 3, the ISR state in the delete session message that SGW is received is active, SGW becomes ISR
Inactive (deactive) state, and return to deleting bearing and accept message to MME, step 4 is executed later；What if SGW was received
ISR state in delete session message is deactive, then SGW directly returns to deleting bearing and accepts message to MME, and
It is transferred to the 6th step and executes operation；ISR is Idle mode Signalling Reduction.
If 4, ISR state is actie, MME sends attachment removal notification message to SGSN.
5, SGSN sends deleting bearing message to SGW.
6, SGW sends deleting bearing message to PGW.
7, PGW replys deleting bearing message.
8, user conversation termination messages are carried out between PGW and PCRF.
9, SGW replys SGSN deleting load-bearing and completes.
10, SGSN replys attachment removal response message.
11~12, user returns to detach received message, while the context between MME, enodeb, UE is discharged
It should be noted that this field is all deactive in existing net, so not having 4~5 and 9 in the process now netted
The part that dotted line indicates in~10, that is, figure.
It can be seen that UE will not be communicated during registration with HSS, therefore, HSS can not learn that user is
It is no to be registered in MME.
Fig. 5 is the signaling process figure for the user log off that MME is initiated in the prior art, as shown in figure 5, in entire user log off
In process, the information of user log off is not all sent to HSS.
The implementation procedure for the user log off that MME is initiated is as follows:
1, MME initiates attachment removal request to UE.
2, MME initiates deleting bearing request to SGW.
If 3, the ISR state in the delete session message that SGW is received is active, SGW becomes ISR
Inactive (deactive) state, and return to deleting bearing and accept message to MME, step 4 is executed later；What if SGW was received
ISR state in delete session message is deactive, then SGW directly returns to deleting bearing and accepts message to MME, and
It is transferred to the 6th step and executes operation；ISR is Idle mode Signalling Reduction.
If 4, ISR state is actie, MME sends attachment removal notification message to SGSN.
5, SGSN sends deleting bearing message to SGW.
6, SGW sends deleting bearing message to PGW.
7, PGW replys deleting bearing message.
8, user conversation termination messages are carried out between PGW and PCRF.
9, SGW replys SGSN deleting load-bearing and completes.
10, SGSN replys attachment removal response message.
11~12, user returns to detach received message, while the context between MME, enodeb, UE carries out release
It should be noted that this field is all deactive in existing net, so not having 4~5 and 9 in the process now netted
The part that dotted line indicates in~10, that is, figure.
Fig. 6 is the signaling process figure for the cancellation that HSS is initiated in the prior art, as shown in fig. 6, in the process of user log off
In, the information all useless that user log off is sent to HSS.
The implementation procedure for the cancellation that HSS is initiated is as follows:
1, HSS sends Cancel Location Request.
2, MME initiates separation process, sends Detach Request message to UE.
3, simultaneously MME to Serving GW send Delete Session Request message.
4, Serving GW sends Delete Session Request message to PDN GW, and relevant bearer is deleted in request.
5, PGW returns to deleting bearing response message to SGW
If 6, dynamic PCC is disposed, PDN GW initiates IP-CAN session stop process to PCRF.
7, Serving GW returns to Delete Session Response message to MME.
8, after UE receives Detach Request message, Detach Accept is sent, separation is received.
10, MME initiates S1 release process, sends UE Context Release Command message to eNodeB,
ENodeB returns to UE Context Release Complete message, discharges successfully.
By Fig. 3, Fig. 4, Fig. 5 and Fig. 6 it is found that HSS is can not to know user for the logout flow path that UE and MME is initiated
State, but after user log off, MME still can retain user data for a period of time, during this period of time, HSS to MME
When inquiring user data, MME can still return to user data, so that HSS obtains the information of mistake.
Fig. 7 is a kind of flow chart of the speech called area selecting method of long term evolution of the embodiment of the present invention, and the present embodiment is held
Row main body is HSS, as shown in fig. 7, instructing this method comprises: receiving updating network state, is referred to according to the updating network state
The value for determining network state position is enabled, the network state position indicates whether called subscriber registers in MME；T-ADS information is received,
Whether support SRVCC function and the T-ADS information according to the value of the network state position, called user terminal, determine described in
The access network of called subscriber.
Firstly, MME sends updating network state instruction to HSS after called subscriber registers in MME and either nullifies,
For notifying network state of the HSS user in MME, HSS receives updating network state instruction, while increasing network in HSS
Mode bit, the network state position indicate network state of the called subscriber in MME.
HSS is instructed according to the updating network state received, is obtained the value of network state position in HSS accordingly, is worked as network
When state update instruction indicates that user has registered in MME, correspondingly, network state position also illustrates that user in MME
The state of registration.Indicate that user nullifies in MME when network state instructs, correspondingly, network state position also illustrates that user exists
The state nullified in MME.
HSS/HLR returns to T-ADS information to SCC AS, which is sent to HSS by SCC AS, and HSS receives this
After T-ADS information, whether SRVCC function and the T-ADS information are supported according to network state position, called user terminal, determines quilt
It is the access network of user.
For the embodiment of the present invention after called subscriber registers or nullifies, MME can send updating network state instruction to HSS,
To notify the network state of HSS called subscriber, therefore HSS understand that called subscriber's real-time network state, ensure that HSS is obtained
The accuracy of data.
Secondly, in the prior art, when called subscriber, which carries out domain, to be selected, SCP AS sends T-ADS query messages and position letter
HSS is ceased, whether HSS has the address SGSN to HLR inquiry called subscriber, and confirms terminal capability, location information to MME simultaneously
Deng.And the present invention passes through the network state position of expression user's real-time network state in HSS, it is no longer necessary to three fusion HSS/HLR
Between mutually look into and HSS is to the process of MME searching user's information, simplify domain and select process, improve domain and select efficiency.
On the basis of the above embodiments, specifically, described to be according to the value of the network state position, called user terminal
No support SRVCC function and the T-ADS information, specifically include: if the network state position indicates that the called subscriber does not exist
It is registered in MME, and the called user terminal does not support SRVCC function, it is determined that the access network of the called subscriber is CS；
If the network state position indicates that the called subscriber is registered in MME, and the called user terminal supports SRVCC function
Can, and the wireless access type of called subscriber described in the T-ADS information is 4G, it is determined that the access net of the called subscriber
Network is IMS.
SRVCC function and the T-ADS information whether are supported according to the value of network state position, called user terminal, are determined
The specific method is as follows for the access network of the called subscriber:
There are two kinds of values of true and false in network state position, when the value of network state position is true, indicates that called subscriber does not exist
It is registered in MME, when the value of network state position is fictitious time, expression called subscriber registers in MME.
If network state position value is false, and called user terminal does not support SRVCC function, then it is determined that called use
The access network at family is CS.
If network state position value is true, and called user terminal supports SRVCC function, while in T-ADS information
RAT TYPE value be E-UTRAN, that is to say, that the wireless access type of called subscriber be 4G, then it is determined that the called subscriber
Access network be IMS.
The embodiment of the invention provides a kind of speech called area selecting method of long term evolution, the value of network state position in HSS
It can learn whether called subscriber registers in MME in real time, and whether be propped up according to the value of network state position, called user terminal
Hold SRVCC function and T-ADS information, so that it may determine that HSS is omitted compared with prior art in the access network of called subscriber
The process and HSS for inquiring called subscriber to HLR database shorten domain and select time delay as the process of MME inquiry called party data,
It improves domain and selects efficiency.
Fig. 8 is a kind of flow chart of the speech called area selecting method of long term evolution of further embodiment of this invention, the present embodiment
Executing subject be MME, as shown in figure 8, this method comprises: called subscriber is being locally registered or the called use if detecting
Family sends updating network state instruction in local cancellation, so that HSS receives the updating network state instruction, according to described
Updating network state instruct determine network state position value, and according to the value of the network state position, called user terminal whether
It supports SRVCC function and the T-ADS information, determines the access network of the called subscriber.
It should be noted that local here just refers to MME.
MME detects that called subscriber registers in MME or called subscriber nullifies in MME, will send network to HSS
State more new command, HSS receive updating network state instruction.
HSS is instructed according to the updating network state received, is obtained the value of network state position in HSS accordingly, is worked as network
When state update instruction indicates that user has registered in MME, correspondingly, network state position also illustrates that user in MME
The state of registration.Indicate that user nullifies in MME when network state instructs, correspondingly, network state position also illustrates that user exists
The state nullified in MME.
HSS/HLR returns to T-ADS information to SCC AS, which is sent to HSS by SCC AS, and HSS receives this
After T-ADS information, whether SRVCC function and the T-ADS information are supported according to network state position, called user terminal, determines quilt
It is the access network of user.
For the embodiment of the present invention after called subscriber registers or nullifies, MME can send updating network state instruction to HSS,
To notify the network state of HSS called subscriber, therefore HSS understand that called subscriber's real-time network state, ensure that HSS is obtained
The accuracy of data.Secondly, the network state position by indicating user's real-time network state in HSS, it is no longer necessary to three fusions
Mutually looking into and HSS is to the process of MME searching user's information between HSS/HLR, simplifies domain and selects process, improves domain choosing effect
Rate.
On the basis of the above embodiments, specifically, described to be according to the value of the network state position, called user terminal
No support SRVCC function and the T-ADS information, determine the access network of the called subscriber, specifically include:
If the network state position indicates that the called subscriber be not locally registered, and the called user terminal is not supported
SRVCC function, it is determined that the access network of the called subscriber is CS；
If the network state position indicates that the called subscriber is registered in local, and the called user terminal is supported
SRVCC function, and the wireless access type of called subscriber described in the T-ADS information is 4G, it is determined that the called subscriber
Access network be IMS.
SRVCC function and the T-ADS information whether are supported according to the value of network state position, called user terminal, are determined
The specific method is as follows for the access network of the called subscriber:
There are two kinds of values of true and false in network state position, when the value of network state position is true, indicates that called subscriber does not exist
It is registered in MME, when the value of network state position is fictitious time, expression called subscriber registers in MME.
If network state position value is false, and called user terminal does not support SRVCC function, then it is determined that called use
The access network at family is CS.
If network state position value is true, and called user terminal supports SRVCC function, while in T-ADS information
RATTYPE value be E-UTRAN, that is to say, that the wireless access type of called subscriber be 4G, then it is determined that the called subscriber
Access network be IMS.
The embodiment of the invention provides a kind of speech called area selecting method of long term evolution, the value of network state position in HSS
It can learn whether called subscriber registers in MME in real time, and whether be propped up according to the value of network state position, called user terminal
Hold SRVCC function and T-ADS information, so that it may determine that HSS is omitted compared with prior art in the access network of called subscriber
The process and HSS for inquiring called subscriber to HLR database shorten domain and select time delay as the process of MME inquiry called party data,
It improves domain and selects efficiency.
Fig. 9 is a kind of signaling diagram of the speech called area selecting method of long term evolution of the embodiment of the present invention, as shown in figure 9, should
The implementation procedure of method is as follows:
Step 1: MME initiates attachment removal request to UE.
Step 2: MME initiates deleting bearing request to SGW.
Step 3: if the ISR state in the delete session message that SGW is received is active, SGW will
ISR becomes inactive (deactive) state, and returns to deleting bearing and accept message to MME, executes step 4 later；If SGW
The ISR state in delete session message received is deactive, then SGW directly returns to deleting bearing and accepts message to
MME, and be transferred to the 6th step and execute operation；ISR is Idle mode Signalling Reduction.
Step 4: if ISR state is actie, MME sends attachment removal notification message to SGSN.
Step 5: SGSN sends deleting bearing message to SGW.
Step 6: SGW sends deleting bearing message to PGW.
Step 7: PGW replys deleting bearing message.
Step 8: user conversation termination messages are carried out between PGW and PCRF.
Step 9: SGW replys SGSN deleting load-bearing and completes.
Step 10: SGSN replys attachment removal response message.
Step 11 and step 12: user returns to detach received message, while upper and lower between MME, enodeb, UE
Text is discharged.
Step 13: notify request and response message is the network state instruction in the present invention, complete in MME
After deleting load-bearing, MME sends updating network state instruction to HSS, and notice HSS user has been logged out, and leaves 4G network.
HSS is instructed according to the updating network state received, is obtained the value of network state position in HSS accordingly, is worked as network
When state update instruction indicates that user has registered in MME, correspondingly, network state position also illustrates that user in MME
The state of registration.Indicate that user nullifies in MME when network state instructs, correspondingly, network state position also illustrates that user exists
The state nullified in MME.
HSS/HLR returns to T-ADS information to SCC AS, which is sent to HSS by SCC AS, and HSS receives this
After T-ADS information, whether SRVCC function and the T-ADS information are supported according to network state position, called user terminal, determines quilt
It is the access network of user.
It should be noted that this ISR field is all deactive in existing net, so not having step in the process now netted
Four~Step 5: the signaling flow direction being represented by dashed line in step 9~step 10, that is, figure.
A kind of flow chart of the speech called area selecting method of long term evolution of the embodiment of the present invention, the executing subject of the present embodiment
It is instructed and is determined according to the updating network state as shown in fig. 7, being instructed this method comprises: receiving updating network state for HSS
The value of network state position, the network state position indicate whether called subscriber registers in MME；T-ADS information is received, according to institute
State the value of network state position, whether called user terminal supports SRVCC function and the T-ADS information, determine the called use
The access network at family.
Figure 10 is a kind of structural schematic diagram of HSS network element of another embodiment of the present invention, as shown in figure 9, the HSS network element packet
Include: network module instructs according to the updating network state for receiving updating network state instruction and determines network state position
Value, the network state position indicate whether called subscriber registers in MME；Domain modeling block, for receiving T-ADS information, according to
Whether the value of the network state position, called user terminal support SRVCC function and the T-ADS information, determine described called
The access network of user.
The implementation procedure phase of the specific implementation procedure of the present embodiment and above-mentioned HSS corresponding domain choosing method when being executing subject
Together, details please refer to above method embodiment, and details are not described herein again.
Specifically, the domain modeling block specifically includes: if the network state position indicates the called subscriber not in MME
Registration, and the called user terminal does not support SRVCC function, it is determined that the access network of the called subscriber is CS；If institute
Stating network state position indicates that the called subscriber is registered in MME, and the called user terminal supports SRVCC function, and
The wireless access type of called subscriber described in the T-ADS information is 4G, it is determined that the access network of the called subscriber is
IMS。
The implementation procedure phase of the specific implementation procedure of the present embodiment and above-mentioned HSS corresponding domain choosing method when being executing subject
Together, details please refer to above method embodiment, and details are not described herein again.
Another embodiment of the present invention provides a kind of MME network element, which includes: detection module, if for detect by
It makes user be locally registered or the called subscriber is in local cancellation, updating network state instruction is sent, so that HSS is received
The updating network state instruction, the value for determining network state position is instructed according to the updating network state, and according to the net
Whether the value of network mode bit, called user terminal support SRVCC function and the T-ADS information, determine the called subscriber's
Access network.
The implementation procedure phase of the specific implementation procedure of the present embodiment and above-mentioned MME corresponding domain choosing method when being executing subject
Together, details please refer to above method embodiment, and details are not described herein again.
Specifically, the detection module specifically includes: if the network state position indicates the called subscriber not in local
Registration, and the called user terminal does not support SRVCC function, it is determined that the access network of the called subscriber is CS；If institute
Stating network state position indicates that the called subscriber is registered in local, and the called user terminal supports SRVCC function, and institute
The wireless access type for stating called subscriber described in T-ADS information is 4G, it is determined that the access network of the called subscriber is
IMS。
The implementation procedure phase of the specific implementation procedure of the present embodiment and above-mentioned MME corresponding domain choosing method when being executing subject
Together, details please refer to above method embodiment, and details are not described herein again.
One embodiment of the invention discloses a kind of computer program product, and the computer program product is non-temporary including being stored in
Computer program on state computer readable storage medium, the computer program include program instruction, when described program instructs
When being computer-executed, computer is able to carry out method provided by above-mentioned each method embodiment, for example, receives network-like
State more new command, the value for determining network state position is instructed according to the updating network state, and the network state position indicates called
Whether user registers in MME；T-ADS information is received, whether is supported according to the value of the network state position, called user terminal
SRVCC function and the T-ADS information, determine the access network of the called subscriber.
One embodiment of the invention provides a kind of non-transient computer readable storage medium, and the non-transient computer is readable to deposit
Storage media stores computer instruction, and the computer instruction makes the computer execute side provided by above-mentioned each method embodiment
Method, for example, updating network state instruction is received, the value for determining network state position is instructed according to the updating network state,
The network state position indicates whether called subscriber registers in MME；T-ADS information is received, according to the network state position
Whether value, called user terminal support SRVCC function and the T-ADS information, determine the access network of the called subscriber.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can be stored in a computer readable storage medium, the program
When being executed, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes: ROM, RAM, magnetic disk or light
The various media that can store program code such as disk.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can be stored in a computer readable storage medium, the program
When being executed, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes: ROM, RAM, magnetic disk or light
The various media that can store program code such as disk.
The embodiments such as the test equipment of display device described above are only schematical, wherein described as separation
The unit of part description may or may not be physically separated, component shown as a unit can be or
It can not be physical unit, it can it is in one place, or may be distributed over multiple network units.It can be according to reality
Border needs to select some or all of the modules therein to achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art
Without paying creative labor, it can understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It realizes by means of software and necessary general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on
Stating technical solution, substantially the part that contributes to existing technology can be embodied in the form of software products in other words, should
Computer software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including several fingers
It enables and using so that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation
Method described in certain parts of example or embodiment.
Finally, method of the invention is only preferable embodiment, it is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in protection of the invention
Within the scope of.
Claims (10)
1. a kind of speech called area selecting method of long term evolution characterized by comprising
Updating network state instruction is received, the value for determining network state position, the network are instructed according to the updating network state
Mode bit indicates whether called subscriber registers in mobile management entity MME；
Called domain selection function T-ADS information is received, whether list is supported according to the value of the network state position, called user terminal
Radio frequency continuous voice call SRVCC function and the T-ADS information, determine the access network of the called subscriber.
2. method according to claim 1, which is characterized in that described whole according to the value of the network state position, called subscriber
Whether end supports SRVCC function and the T-ADS information, determines the access network of the called subscriber, specifically includes:
If the network state position indicates that the called subscriber does not register in MME, and the called user terminal is not supported
SRVCC function, it is determined that the access network of the called subscriber is circuit switching (CS)；
If the network state position indicates that the called subscriber is registered in MME, and the called user terminal supports SRVCC
Function, and the wireless access type of called subscriber described in the T-ADS information is fourth generation mobile communication technology 4G, it is determined that
The access network of the called subscriber is IP multimedia subsystem IMS.
3. a kind of speech called area selecting method of long term evolution characterized by comprising
If detecting, called subscriber is being locally registered or the called subscriber is in local cancellation, is sent updating network state and is referred to
It enables, so that home signature user server HSS receives the updating network state instruction, is referred to according to the updating network state
Enable determine network state position value, and according to the value of the network state position, called user terminal whether support SRVCC function and
The T-ADS information determines the access network of the called subscriber.
4. method according to claim 3, which is characterized in that described whole according to the value of the network state position, called subscriber
Whether end supports SRVCC function and the T-ADS information, determines the access network of the called subscriber, specifically includes:
If the network state position indicates that the called subscriber be not locally registered, and the called user terminal is not supported
SRVCC function, it is determined that the access network of the called subscriber is CS；
If the network state position indicates that the called subscriber is registered in local, and the called user terminal supports SRVCC
Function, and the wireless access type of called subscriber described in the T-ADS information is 4G, it is determined that the access of the called subscriber
Network is IMS.
5. a kind of HSS network element characterized by comprising
Network module instructs according to the updating network state for receiving updating network state instruction and determines network state position
Value, the network state position indicates whether called subscriber registers in MME；
Whether domain modeling block is supported for receiving T-ADS information according to the value of the network state position, called user terminal
SRVCC function and the T-ADS information, determine the access network of the called subscriber.
6. network element according to claim 5, which is characterized in that the domain modeling block specifically includes:
If the network state position indicates that the called subscriber does not register in MME, and the called user terminal is not supported
SRVCC function, it is determined that the access network of the called subscriber is CS；
If the network state position indicates that the called subscriber is registered in MME, and the called user terminal supports SRVCC
Function, and the wireless access type of called subscriber described in the T-ADS information is 4G, it is determined that the access of the called subscriber
Network is IMS.
7. a kind of MME network element characterized by comprising
Detection module, if sending net for detecting that called subscriber is being locally registered or the called subscriber is in local cancellation
Network state more new command is instructed according to the updating network state and is determined so that HSS receives the updating network state instruction
The value of network state position, and whether SRVCC function and the T- are supported according to the value of the network state position, called user terminal
ADS information determines the access network of the called subscriber.
8. network element according to claim 7, which is characterized in that the detection module specifically includes:
If the network state position indicates that the called subscriber be not locally registered, and the called user terminal is not supported
SRVCC function, it is determined that the access network of the called subscriber is CS；
If the network state position indicates that the called subscriber is registered in local, and the called user terminal supports SRVCC
Function, and the wireless access type of called subscriber described in the T-ADS information is 4G, it is determined that the access of the called subscriber
Network is IMS.
9. a kind of computer program product, which is characterized in that the computer program product includes being stored in non-transient computer
Computer program on readable storage medium storing program for executing, the computer program include program instruction, when described program is instructed by computer
When execution, the computer is made to execute the method as described in claim 1 to 2 is any.
10. a kind of non-transient computer readable storage medium, which is characterized in that the non-transient computer readable storage medium is deposited
Computer instruction is stored up, the computer instruction makes the computer execute the method as described in claim 1 to 2 is any.
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