CN106685890A - Optimization method, apparatus and system for calling VoLTE user - Google Patents
Optimization method, apparatus and system for calling VoLTE user Download PDFInfo
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- CN106685890A CN106685890A CN201510747416.4A CN201510747416A CN106685890A CN 106685890 A CN106685890 A CN 106685890A CN 201510747416 A CN201510747416 A CN 201510747416A CN 106685890 A CN106685890 A CN 106685890A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1069—Session establishment or de-establishment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/08—Mobility data transfer
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Abstract
The embodiments of the invention disclose an optimization method for calling a VoLTE user. The method includes the following steps: in the process when a called business of the VoLTE user is anchored to an IP multimedia sub-system (IMS), if a service-call session control function entity (S-CSCF) receives a signally which is transmitted by an inquiry-call session control function entity (I-CSCF), the S-CSCF recording the identification information of an invited media gateway control function entity (MGCF) carried in the signaling which is transmitted by the I-CSCF; when the S-CSCF acquires the CS domain routing number (CSRN) of the called subscriber, the S-CSCF, based on the recorded identification information of the invited MGCF, selecting the MGCF as an uninvited the MGCF. The embodiments of the invention also disclose an optimization apparatus and system for calling a VoLTE user.
Description
Technical field
The present invention relates to VoLTE (the Voice over of Long Term Evolution (LTE, Long Term Evolution)
LTE) technology, more particularly to a kind of optimization method of calling VoLTE user, device and system.
Background technology
LTE voice solutions based on VoLTE, when VoLTE user by timesharing Long Term Evolution (TD-LTE,
Time Division-LTE) network wireless is when covering, and can be by LTE wireless networks and evolution block core net
(Evolved Packet Core, EPC) access IP Multimedia System (IP Multimedia Subsystem,
IMS) core net and IMS business platforms；Now, VoLTE routes are completed by IMS core net and is called
Control, by IMS business platforms VoLTE Business Processings are realized.When VoLTE user is not by TD-LTE nets
Network cover and not by 2G/ TD SDMAs (TD-SCDMA, Time Division-Synchronous
Code Division Multiple Access) network coverage when, can by 2G or TD-SCDMA it is wireless
Net core network access circuit switching (Circuit Switched, CS) domain, is carried by core net CS domain for user
For voice service.
At present, be the voice intercommunication that ensures VoLTE user and existing network 2G/3G user, can using domain choosing and
The technical implementation way such as grappling.
Domain choosing and grappling are specifically described separately below：
1) domain choosing
Due to supporting that the terminal of VoLTE can have various modes, the terminal is in the case where different signal intensitys is covered
Different networks can be attached to, such as 2G/3G networks is attached to sometimes, LTE network is attached to sometimes.Cause
This, supporting that the terminal of VoLTE will select to access one of network in calling carries out voice call, this
When select access network process be known as domain choosing.Specifically, when user is used as caller, by terminal according to
The registered network information of preservation completes domain choosing；When user as it is called when, by network side seriality application service
Device (Service Centralization and Continuity Application Server, SCC-AS) inquiry fusion
Attaching position register (Home Location Register, HLR)/home signature user server (Home
Subscriber Server, HSS) obtain registered network information complete domain choosing；Here, it is also possible to close using three
One HSS replaces HLR/HSS to realize corresponding function, and the three-in-one HSS includes IMS-HSS, is
System structure evolution-home signature user server (System Architecture Evolution-HSS,
) and 2G/3G HLR SAE-HSS.Here, when user as it is called when, SCC-AS carries out input field choosing
(Terminating Access Domain Selection, T-ADS) is selected, at this point it is possible to three-in-one HSS
Inquiry T-ADS information.
Fig. 1 is that flow chart is selected in the domain of VoLTE in prior art, as shown in figure 1, the flow process includes：
Step 11：Call conversation control function entity (Call Session Control Function, CSCF)
Reception carries mobile subscriber number (the Mobile Subscriber International of called subscriber
ISDN/PSTN number, MSISDN) Incoming invite message；Here, CSCF includes servicing-exhaling
Cry conversation control function entity (Serving-Call Session Control Function, S-CSCF) and inquiry-
Call conversation control function entity (Interrogating-Call Session Control Function, I-CSCF).
Step 12：The iFC template datas that CSCF contracts according to user, by Incoming invite message send to
SCC-AS, triggers SCC-AS.
Step 13：When SCC-AS needs to inquire about the T-ADS information of called subscriber to fusion HLR/HSS,
SCC-AS to fusion HLR/HSS sends UDR/ATI message, and the UDR/ATI message is used for acquisition request
The T-ADS information of called subscriber.Here, the purpose of SCC-AS inquiries fusion HLR/HSS is to sentence
Which network disconnected called user domain chooses, and if before inquiry fusion HLR/HSS called use can be judged
Which network family domain chooses, then without the need for initiating inquiry.
Step 14：HLR/HSS is after UDR/ATI message is received for fusion, to mobile management nodes (Mobility
Management Entity, MME) IDR message is sent, to Serving GPRS Support Node (Serving GPRS
Support Node, SGSN) send IDR/PSI message；Thus, called subscriber can be inquired in LTE
The hour of log-on stamp of network and GPRS/WCDMA/TD-SCDMA networks；Here, MME is by called use
Family is back in the hour of log-on stamp of LTE network by IDR message merges HLR/HSS, and SGSN will be by
User is made to return by IDR/PSI message in the hour of log-on stamp of GPRS/WCDMA/TD-SCDMA networks
It is back to fusion HLR/HSS.
Step 15：Fusion HLR/HSS is stabbed by comparison time, and the T-ADS information of called subscriber is passed through
UDA/ATI_ACK message is sent to SCC-AS；T-ADS information of the SCC-AS based on called subscriber is true
Determine called subscriber positioned at CS domains when, skip to step 16.
Step 16：SCC-AS to fusion HLR/HSS sends UDR message, for request fusion HLR/HSS
The routing number (CS domain routing number, CSRN) in the CS domains of inquiry called subscriber；Fusion
HLR/HSS to mobile interaction center server (Mobile Switch Center Server, MSCS) sends
PRN message, MSCS after the PRN message is received, by called subscriber's roaming number (Mobile Station
Roaming Number, MSRN) it is back to fusion HLR/HSS；Fusion HLR/HSS is based on called use
The MSRN at family draws the CSRN of called subscriber, and the CSRN of called subscriber is sent out by UDA message
Deliver to SCC-AS.
Step 17：SCC-AS sends the CSRN of called subscriber to CSCF by invite message.
Step 18：CSCF according to the CSRN of called subscriber, by the called use of call proceeding to particular network
Family；During CSRN is by call proceeding to called subscriber, CSCF is needed the CSRN of called subscriber
By invite message send to MGCF entity (Media Gateway Control Function,
MGCF)/WMG (Media Gateway, MGW), MGCF/MGW is needed called subscriber
MSISDN sent to MSCS by IAM message.
2) grappling (Anchoring)
Grappling refers to the process of that calling is routed to into IMS domain from CS domains carries out Business Processing；Wherein single grappling
Scheme is：All called services of VoLTE user are connected to into first IMS domain, and quilt is triggered in IMS domain
It is business.
In following two scenes, will can be needed with the user-dependent call requests of LTE using single anchoring scheme
It is routed to IMS domain：
The first scene：Calling subscribe is the VoLTE user accessed from CS domains, in calling VoLTE user
When, by grappling (Anchor AS) the intelligence number of changing, route the call to IMS domain triggering called service.
Second scene：Calling subscribe is the CS domains network user, during calling VoLTE user, by grappling
(Anchor AS) intelligence number of changing, routes the call to IMS domain triggering called service.
Fig. 2 is the flow chart of anchoring scheme in prior art, as shown in Fig. 2 the flow process includes：
Step 21：Originating switch (Visted Mobile Switching Centre, VMSC) is to called ownership
The three-in-one HSS on ground initiates inquiry request, inquires about the terminating CAMEL Subscription Information of called subscriber
(Terminating CAMEL Subscription Information, T-CSI), the three-in-one HSS is to master
VMSC is made to return the T-CSI of called subscriber.
Step 22：Originating switch is triggered to service control point (Service Control based on the T-CSI for obtaining
Point, SCP)/VoLTE application servers (VoLTE AS), called number is sent to SCP/VoLTE
AS, SCP/VoLTE AS inserts route code before called number, forms grappling code, and grappling code is back to
Caller VMSC.
Step 23：The data configuration in CS domains is carried out in caller VMSC, according to grappling code and by called
The GMSC (Gateway Mobile Switching Center, GMSC) of ownership place sends
Signaling, routes the call to dialed field GMSC, and dialed field GMSC is directly routed the call to
The MGCF of Incoming.
Generally, there is n MGCF in dialed field, and n is the natural number more than 1, in this step, enter
The MGCF of office is any one MGCF of dialed field.
In this step, the path of Media Stream is：Caller VMSC-dialed field GMSC-Incoming
MGCF, the path of signaling flow is：Caller VMSC-the first call pacing node (Call Mediation
Node, CMN)-dialed field GMSC-Incoming MGCF.
Here, Media Stream is in the MGCF through Incoming, if Incoming MGCF be connected with it is multiple
IMS-MGW, then MGCF needs controls use one of IMS-MGW, used in this step
IMS-MGW be designated as IMS-MGW1.
Step 24：The MGCF of Incoming sends a message to the I-CSCF of called subscriber according to default route,
The three-in-one HSS that the I-CSCF passes through inquiry dialed field, obtains the S-CSCF of called subscriber.
In this step, the path of signaling flow is：The I-CSCF of the MGCF-called subscriber of Incoming-called returns
The three-in-one HSS in possession.
Step 25：The I-CSCF of called subscriber routes the call to called subscriber's by sending signaling
S-CSCF；Afterwards, the S-CSCF triggering SCP/VoLTE AS of called subscriber, SCP/VoLTE AS are included
SCC-AS；When SCP/VoLTE AS are triggered, obtain called to the three-in-one HSS of dialed field
The T-ADS information of user.
Here, the I-CSCF of called subscriber is presented to the signaling that S-CSCF sends with invite message, in addition,
In this step, the process for obtaining the T-ADS information of called subscriber is made in step 13 to step 14
Illustrate, repeat no more here.
In this step, the path of signaling flow is：The S-CSCF of the I-CSCF-called subscriber of called subscriber-
SCP/VoLTE AS。
Step 26：SCP/VoLTE AS determine that called subscriber is located at based on the T-ADS information of called subscriber
During CS domains, the CSRN of called subscriber is obtained.
Here, the process for obtaining the CSRN of called subscriber is made an explanation in step 15 to step 16,
Here repeat no more.
In this step, the path of signaling flow is：The three-in-one HSS of SCP/VoLTE AS-dialed field
—SCP/VoLTE AS。
Step 27：SCP/VoLTE AS send the CSRN of called subscriber to the S-CSCF of called subscriber,
The S-CSCF of called subscriber selects the MGCF of a striking out in the MGCF of n dialed field；
According to the CSRN of the called subscriber for obtaining, by out MGCF, called VMSC is routed the call to,
Now calling is routed to CS domains.
In this step, the path of Media Stream is：The MGCF of the MGCF-striking out of the Incoming of dialed field
- called VMSC, the path of signaling flow is：Out MGCF-the second call pacing node-called
VMSC。
Here, Media Stream through out MGCF, is needing, using an IMS-MGW realization, to incite somebody to action this
IMS-MGW in step is designated as IMS-MGW2.
Obviously, in the grappling flow process shown in Fig. 2, in the S-CSCF of called subscriber out MGCF is selected
When, select out MGCF to have the probability of (n-1)/n different from the MGCF of Incoming, when the value of n it is larger
When, out MGCF different from the MGCF of Incoming probability can also become larger.
As can be seen that in the grappling flow process shown in Fig. 2, as the out MGCF and MGCF of Incoming
When different, signaling flow needs across 2 MGCF, thus, causing signaling flow in whole grappling flow process
It is roundabout, call delay end to end is increased, while reducing the efficiency of complaint handling and fault location.
The content of the invention
To solve above-mentioned technical problem, the embodiment of the present invention is expected to provide a kind of optimization of calling VoLTE user
Methods, devices and systems, it is possible to reduce signaling flow and Media Stream it is roundabout, improve complaint handling and failure be fixed
The efficiency of position.
The technical scheme is that what is be achieved in that：
A kind of optimization method of calling VoLTE user is embodiments provided, including：
During the called service of VoLTE user is connected to IP Multimedia System IMS domain by grappling,
Interrogation-call session control function entity is received in service-call session control function entity S-CSCF
During the signaling that I-CSCF sends, S-CSCF records the matchmaker of the Incoming carried in the signaling that the I-CSCF sends
The identification information of body gateway control function entity MGCF；
During the routing number CSRN in the CS domains that called subscriber is got in S-CSCF, S-CSCF is based on institute
The identification information of the MGCF of the Incoming of record, the MGCF of Incoming is selected as out MGCF.
In such scheme, before S-CSCF receives the signaling that I-CSCF sends, methods described also includes：
The GMSC GMSC of dialed field selects the MGCF of Incoming, routes the call to Incoming
MGCF；The MGCF of Incoming processes Media Stream using an IMS- media gateway MGW first,
Record the identification information of the IMS-MGW for itself using first；
After S-CSCF selects the MGCF of Incoming for out MGCF, methods described also includes：
The identification information of the IMS-MGW that the out MGCF is used first based on the MGCF of the Incoming,
The IMS-MGW that used first using the MGCF of the Incoming of control is processing Media Stream.
In such scheme, identification informations of the S-CSCF based on the MGCF of recorded Incoming will enter
The MGCF of office selects the MGCF for striking out, including：The S-CSCF obtains the MGCF of CSRN ownership
List, determines that the MGCF of Incoming belongs to CSRN in the identification information of the MGCF based on recorded Incoming
During the MGCF lists of ownership, the MGCF of Incoming is selected as out MGCF.
In such scheme, before S-CSCF receives the signaling that I-CSCF sends, methods described also includes：
The MGCF of the Incoming sends the signaling of the identification information of the MGCF for carrying Incoming to I-CSCF.
In such scheme, the signaling that the I-CSCF that the S-CSCF is received sends is realized by invite message.
The embodiment of the present invention additionally provides a kind of optimization device of calling VoLTE user, and described device is arranged at
In service-call session control function entity S-CSCF, including logging modle and selecting module；Wherein,
Logging modle, IP Multimedia System is connected to for the called service in VoLTE user by grappling
During IMS domain, when the signaling of interrogation-call session control function entity I-CSCF transmissions is received,
Record the MGCF entity MGCF's of the Incoming carried in the signaling that the I-CSCF sends
Identification information；
Selecting module, for when the routing number CSRN in CS domains of called subscriber is got, based on institute
The identification information of the MGCF of the Incoming of record, the MGCF of Incoming is selected as out MGCF.
In such scheme, the selecting module, the MGCF lists specifically for obtaining CSRN ownership, base
Determine that the MGCF of Incoming belongs to CSRN ownership in the identification information of the MGCF of the Incoming for being recorded
During MGCF lists, the MGCF of Incoming is selected as out MGCF.
In such scheme, the signaling that the I-CSCF that the S-CSCF is received sends is realized by invite message.
The embodiment of the present invention additionally provides a kind of optimization system of calling VoLTE user, including call session control
The MGCF entity MGCF of functional entity S-CSCF processed and Incoming；Wherein,
S-CSCF, for being connected to IP Multimedia System IMS by grappling in the called service of VoLTE user
During domain, when the signaling of interrogation-call session control function entity I-CSCF transmissions is received, note
Record the identification information of the MGCF of the Incoming carried in the signaling that the I-CSCF sends；It is called getting
During the routing number CSRN in the CS domains of user, based on the identification information of the MGCF of the Incoming for being recorded,
The MGCF of Incoming is selected as out MGCF；
The MGCF of Incoming, for being connected to IP multimedias by grappling in the called service of VoLTE user
During system IMS domain, when first using an IMS- media gateway MGW to process Media Stream,
Record the identification information of the IMS-MGW for itself using first；Routing the call to called end office VMSC
When, the identification information of the IMS-MGW used first based on itself, what control was used first using itself
IMS-MGW is processing Media Stream.
In such scheme, the MGCF of the Incoming is additionally operable to carry Incoming to I-CSCF transmissions
The signaling of the identification information of MGCF.
A kind of optimization method for calling VoLTE user provided in an embodiment of the present invention, device and system,
When S-CSCF receives the signaling of I-CSCF transmissions, S-CSCF is recorded in the signaling that the I-CSCF sends
The identification information of the MGCF of the Incoming of carrying；When S-CSCF gets the CSRN of called subscriber,
Identification informations of the S-CSCF based on the MGCF of recorded Incoming, the MGCF of Incoming is selected as striking out
MGCF.Thus, the MGCF of Incoming and the MGCF of striking out are same MGCF, and then can be with
The roundabout of signaling flow is reduced, the efficiency of complaint handling and fault location is improved.
Description of the drawings
Fig. 1 is that flow chart is selected in the domain of VoLTE in prior art；
Fig. 2 is the flow chart of anchoring scheme in prior art；
Fig. 3 is the flow chart of the embodiment of the optimization method of present invention calling VoLTE user；
Fig. 4 be Fig. 2 shown in grappling flow process present in signaling flow and Media Stream path schematic diagram；
Fig. 5 be the present invention calling VoLTE user optimization method embodiment present in signaling flow and media
The path schematic diagram of stream；
Fig. 6 is the composition structural representation of the optimization device that the embodiment of the present invention calls VoLTE user；
Fig. 7 is the composition structural representation of the optimization system that the embodiment of the present invention calls VoLTE user.
Specific 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 carried out clearly
Chu, it is fully described by.
First embodiment
The embodiment of the invention discloses a kind of optimization method of calling VoLTE user, the method is suitable for exhaling
The anchoring process during VoLTE user for being located at CS domains is made to be optimized.
Fig. 3 is the flow chart of the embodiment of the optimization method of present invention calling VoLTE user, as shown in figure 3,
The flow process includes：
Step 300：During dialed field GMSC routes the call to the MGCF of Incoming, quilt
Make ownership place GMSC select the MGCF of Incoming, the MGCF of Incoming by the identification information of itself send to
I-CSCF。
This step is specifically included：Dialed field GMSC is selected in n MGCF of dialed field
A MGCF is selected as the MGCF of Incoming；
While the MGCF of Incoming sends a message to the I-CSCF of IMS domain according to default route, enter
The MGCF of office sends the identification information of itself to I-CSCF；Here, the mark letter of the MGCF of Incoming
MGCF of the breath comprising Incoming is different from the feature letter of other MGCF in n MGCF of dialed field
Breath.
In this step, the MGCF of Incoming can by the identification information of itself by invite message send to
I-CSCF, specifically, can carry the mark letter of the MGCF of Incoming in the Via header field of invite message
Breath, is presented herein below an example of the identification information of the MGCF that Incoming is carried in Via header field：
Via:SIP/2.0/TCP GZ.MGCF07.GD.CHINAMOBILE.COM:5060
In the Via header field, " MGCF07.GD.CHINAMOBILE.COM:5060 " Incoming is represented
The identification information of MGCF.
Further, this step also includes：The MGCF of Incoming is routed the call in dialed field GMSC
During, the MGCF of Incoming is needed in each IMS-MGW being connected with itself, and control uses one
IMS-MGW is processing Media Stream；The mark letter of the IMS-MGW that the MGCF records of Incoming are used first
Breath, the identification information of the IMS-MGW is included and is different from other being connected with the MGCF of Incoming
The characteristic information of IMS-MGW.
Here, the identification information of the IMS-MGW for using first can be passed through invite by the MGCF of Incoming
Session Description Protocol (Session Description Protocol, the SDP) message of message is recorded.
Step 301：After I-CSCF sends signaling to S-CSCF, S-CSCF records the I-CSCF and sends out
The identification information of the MGCF of the Incoming carried in the signaling sent.
Here, I-CSCF can be realized to the signaling that S-CSCF sends using invite message.
Step 302：When S-CSCF receives the CSRN of called subscriber, execution step 303.
Here, the source of the CSRN of called subscriber is SCC-AS, and S-CSCF obtains the CSRN of called subscriber
Process have various existing implementations, be not repeated herein.
In this step, if S-CSCF can receive the CSRN of called subscriber, called subscriber is illustrated
Positioned at CS domains.
In addition, if S-CSCF is connected to the process of IMS domain in the called service of VoLTE user by grappling
In be not received by the CSRN of called subscriber, then illustrate that called subscriber is not located at CS domains, now S-CSCF
Follow-up process can be performed according to existing anchoring scheme, be repeated no more here.
Step 303：S-CSCF judges whether the MGCF of Incoming belongs to the CSRN ownership of called subscriber
MGCF lists；If it is not, then step 304 is skipped to, if it is, skipping to step 305.
In this step, the S-CSCF judges whether the MGCF of Incoming belongs to the CSRN of called subscriber and return
The MGCF lists of category, including：S-CSCF obtains the CSRN ownership of locally configured called subscriber
MGCF lists, based on the identification information of the MGCF of the Incoming for being recorded, judging the MGCF of Incoming is
The MGCF lists of the no CSRN ownership for belonging to called subscriber.
Step 304：S-CSCF randomly chooses a MGCF in the MGCF lists that CSRN belongs to
As out MGCF, afterwards, terminate flow process.
After this step, out MGCF is according to existing anchoring scheme by the called VMSC of call routing.
Step 305：Identification informations of the S-CSCF based on the MGCF of recorded Incoming, inciting somebody to action Incoming
The MGCF of Incoming is selected as out MGCF.
Due in existing anchoring techniques scheme, the MGCF of the Incoming and MGCF of striking out be two not
Same MGCF, due to there is Signalling exchange between the two different MGCF, can cause to increase by two not
IP bearer network link loads between same MGCF；Relatively, in first embodiment of the invention, Incoming
MGCF and the MGCF of striking out be same MGCF, thus, can avoid the occurrence of two it is different
IP bearer network link loads between MGCF；Simultaneously, it is possible to reduce roundabout, the raising complaints department of signaling flow
The efficiency of reason and fault location.
Further, after the MGCF by Incoming is selected as out MGCF, this step also includes：
The identification information of the IMS-MGW that the out MGCF is used first based on the MGCF of the Incoming,
The IMS-MGW used first using the MGCF of the Incoming processes Media Stream.
That is, in first embodiment of the invention, for the MGCF of Incoming, needing in dialed field
During GMSC routes the call to the MGCF of Incoming, processed using an IMS-MGW first
Media Stream；And need after itself is selected as out MGCF, to reuse identical IMS-MGW
To process Media Stream.
Fig. 4 is the path schematic diagram of signaling flow and Media Stream present in the grappling flow process shown in Fig. 2, such as schemes
Shown in 4, CS represents CS domains, and invite represents invite message, and MGCF1 represents the MGCF of Incoming,
MGCF2 represents the MGCF of striking out, and IMS-MGW1 represents the IMS-MGW that the MGCF of Incoming is used,
IMS-MGW2 represents the IMS-MGW that the MGCF of striking out is used, and in the diagram, Media Stream is with laterally
Dotted line represent that signaling flow is represented with horizontal solid line.As can be seen that in the grappling flow process shown in Fig. 2,
When out MGCF is different from the MGCF of Incoming, signaling flow needs to cross over 2 in whole grappling flow process
Individual MGCF, corresponding Media Stream need to cross over 2 IMS-MGW, thus, not only causing signaling flow and matchmaker
Body stream it is roundabout, call delay end to end is increased, while reducing the efficiency of complaint handling and fault location.
Relatively, Fig. 5 be the present invention calling VoLTE user optimization method embodiment present in signaling
The path schematic diagram of stream and Media Stream, as shown in figure 5, CS represents CS domains, invite represents invite message；
The MGCF of Incoming and the MGCF of striking out are same MGCF, are designated as MGCF3；The MGCF of Incoming
The IMS-MGW for using twice is designated as IMS-MGW3；In Figure 5, Media Stream represents with horizontal dotted line,
Signaling flow is represented with horizontal solid line.By contrasting Fig. 5 and Fig. 4, it can be seen that by present invention calling
The embodiment of the optimization method of VoLTE user, it is possible to reduce roundabout, the raising complaint of signaling flow and Media Stream
Process the efficiency with fault location.
Second embodiment
Based on the optimization method of the calling VoLTE user of the embodiment of the present invention, the embodiment of the present invention is additionally provided
A kind of optimization device of calling VoLTE user.
Fig. 6 is the composition structural representation of the optimization device that the embodiment of the present invention calls VoLTE user, is such as schemed
Shown in 6, the device is arranged in S-CSCF, including logging modle 600 and selecting module 601；Wherein,
Logging modle 600, for being connected to IP multimedia subsystems by grappling in the called service of VoLTE user
During system IMS domain, in the signaling for receiving interrogation-call session control function entity I-CSCF transmissions
When, record the MGCF entity MGCF of the Incoming carried in the signaling that the I-CSCF sends
Identification information；Here, the signaling that the I-CSCF that the S-CSCF is received sends passes through invite message realities
It is existing.
Selecting module 601, for when the routing number CSRN in CS domains of called subscriber is got, being based on
The identification information of the MGCF of the Incoming for being recorded, the MGCF of Incoming is selected as out MGCF.
Specifically, the selecting module 601, for obtaining the MGCF lists of CSRN ownership, based on institute
The identification information of the MGCF of the Incoming of record determines that the MGCF of Incoming belongs to the MGCF of CSRN ownership
During list, the MGCF of Incoming is selected as out MGCF.
In actual applications, the logging modle 600 and selecting module 601 can be by S-CSCF
Central processing unit (Central Processing Unit, CPU), microprocessor (Micro Processor Unit,
MPU), digital signal processor (Digital Signal Processor, DSP) or field-programmable gate array
Row (Field Programmable Gate Array, FPGA) etc. are realized.
3rd embodiment
Based on the optimization method of the calling VoLTE user of the embodiment of the present invention, the embodiment of the present invention is additionally provided
A kind of optimization system of calling VoLTE user.
Fig. 7 is the composition structural representation of the optimization system that the embodiment of the present invention calls VoLTE user, is such as schemed
Shown in 7, the system includes the MGCF 702 of S-CSCF 701 and Incoming；Wherein,
S-CSCF 701, for being connected to IP multimedia subsystems by grappling in the called service of VoLTE user
During system IMS domain, in the signaling for receiving interrogation-call session control function entity I-CSCF transmissions
When, record the identification information of the MGCF of the Incoming carried in the signaling that the I-CSCF sends；Obtaining
To the CS domains of called subscriber routing number CSRN when, the mark based on the MGCF of the Incoming for being recorded
Information, the MGCF of Incoming is selected as out MGCF.
The MGCF 702 of Incoming, for being connected to IP multimedias by grappling in the called service of VoLTE user
During subsystem, IMS domain, using an IMS- media gateway MGW Media Stream is processed first
When, record the identification information of the IMS-MGW for itself using first；Routing the call to called end office
During VMSC, the identification information of the IMS-MGW used first based on itself, control is made first using itself
With IMS-MGW processing Media Stream..
Further, the MGCF 702 of the Incoming, is additionally operable to carry Incoming to I-CSCF transmissions
The signaling of the identification information of MGCF.
Those skilled in the art are it should be appreciated that embodiments of the invention can be provided as method, system or meter
Calculation machine program product.Therefore, the present invention can using hardware embodiment, software implementation or with reference to software and
The form of the embodiment of hardware aspect.And, the present invention can be adopted and wherein include calculating at one or more
Computer-usable storage medium (including but not limited to disk memory and the optical storage of machine usable program code
Device etc.) on implement computer program form.
The present invention is with reference to method according to embodiments of the present invention, equipment (system) and computer program
Flow chart and/or block diagram describing.It should be understood that can be by computer program instructions flowchart and/or side
The knot of each flow process and/or square frame and flow chart and/or the flow process in block diagram and/or square frame in block diagram
Close.Can provide these computer program instructions to general purpose computer, special-purpose computer, Embedded Processor or
The processor of other programmable data processing devices is producing a machine so that by computer or other can
The instruction of the computing device of programming data processing equipment is produced for realizing in one flow process or multiple of flow chart
The device of the function of specifying in one square frame of flow process and/or block diagram or multiple square frames.
These computer program instructions may be alternatively stored in can guide computer or other programmable data processing devices
In the computer-readable memory for working in a specific way so that in being stored in the computer-readable memory
Instruction produces the manufacture for including command device, and the command device is realized in one flow process of flow chart or multiple streams
The function of specifying in one square frame of journey and/or block diagram or multiple square frames.
These computer program instructions also can be loaded in computer or other programmable data processing devices, made
Obtain and series of operation steps is performed on computer or other programmable devices to produce computer implemented place
Reason, so as to the instruction performed on computer or other programmable devices is provided for realizing in flow chart one
The step of function of specifying in flow process or one square frame of multiple flow processs and/or block diagram or multiple square frames.
The above, only presently preferred embodiments of the present invention is not intended to limit the protection model of the present invention
Enclose.
Claims (10)
1. it is a kind of calling VoLTE user optimization method, it is characterised in that methods described includes：
During the called service of VoLTE user is connected to IP Multimedia System IMS domain by grappling,
Interrogation-call session control function entity is received in service-call session control function entity S-CSCF
During the signaling that I-CSCF sends, S-CSCF records the matchmaker of the Incoming carried in the signaling that the I-CSCF sends
The identification information of body gateway control function entity MGCF；
During the routing number CSRN in the CS domains that called subscriber is got in S-CSCF, S-CSCF is based on institute
The identification information of the MGCF of the Incoming of record, the MGCF of Incoming is selected as out MGCF.
2. method according to claim 1, it is characterised in that receive I-CSCF in S-CSCF and send out
Before the signaling sent, methods described also includes：The GMSC GMSC of dialed field is selected
The MGCF of Incoming, routes the call to the MGCF of Incoming；The MGCF of Incoming uses first an IMS-
Media gateway MGW records the identification information of the IMS-MGW for itself using first processing Media Stream；
After S-CSCF selects the MGCF of Incoming for out MGCF, methods described also includes：
The identification information of the IMS-MGW that the out MGCF is used first based on the MGCF of the Incoming,
The IMS-MGW that used first using the MGCF of the Incoming of control is processing Media Stream.
3. method according to claim 1, it is characterised in that the S-CSCF is based on being recorded
The identification information of the MGCF of Incoming, by the MGCF of Incoming the MGCF for striking out is selected, including：Institute
The MGCF lists that S-CSCF obtains CSRN ownership are stated, the MGCF's based on recorded Incoming
When identification information determines that the MGCF of Incoming belongs to the MGCF lists of CSRN ownership, by the MGCF of Incoming
Select as out MGCF.
4. the method according to any one of claims 1 to 3, it is characterised in that receive in S-CSCF
Before the signaling that I-CSCF sends, methods described also includes：The MGCF of the Incoming to I-CSCF sends
Carry the signaling of the identification information of the MGCF of Incoming.
5. the method according to any one of claims 1 to 3, it is characterised in that the S-CSCF connects
The signaling that the I-CSCF of receipts sends is realized by invite message.
6. it is a kind of calling VoLTE user optimization device, it is characterised in that described device be arranged at service-
In call conversation control function entity S-CSCF, including logging modle and selecting module；Wherein,
Logging modle, IP Multimedia System is connected to for the called service in VoLTE user by grappling
During IMS domain, when the signaling of interrogation-call session control function entity I-CSCF transmissions is received,
Record the MGCF entity MGCF's of the Incoming carried in the signaling that the I-CSCF sends
Identification information；
Selecting module, for when the routing number CSRN in CS domains of called subscriber is got, based on institute
The identification information of the MGCF of the Incoming of record, the MGCF of Incoming is selected as out MGCF.
7. device according to claim 6, it is characterised in that the selecting module, specifically for obtaining
Take CSRN ownership MGCF lists, based on the identification information of the MGCF of the Incoming for being recorded determine into
When the MGCF of office belongs to the MGCF lists of CSRN ownership, the MGCF of Incoming is selected as striking out
MGCF。
8. the device according to claim 6 or 7, it is characterised in that what the S-CSCF was received
The signaling that I-CSCF sends is realized by invite message.
9. it is a kind of calling VoLTE user optimization system, it is characterised in that the system include calling meeting
The MGCF entity MGCF of words control function entity S-CSCF and Incoming；Wherein,
S-CSCF, for being connected to IP Multimedia System IMS by grappling in the called service of VoLTE user
During domain, when the signaling of interrogation-call session control function entity I-CSCF transmissions is received, note
Record the identification information of the MGCF of the Incoming carried in the signaling that the I-CSCF sends；It is called getting
During the routing number CSRN in the CS domains of user, based on the identification information of the MGCF of the Incoming for being recorded,
The MGCF of Incoming is selected as out MGCF；
The MGCF of Incoming, for being connected to IP multimedias by grappling in the called service of VoLTE user
During system IMS domain, when first using an IMS- media gateway MGW to process Media Stream,
Record the identification information of the IMS-MGW for itself using first；Routing the call to called end office VMSC
When, the identification information of the IMS-MGW used first based on itself, what control was used first using itself
IMS-MGW is processing Media Stream.
10. system according to claim 9, it is characterised in that the MGCF of the Incoming, also uses
In the signaling of the identification information that the MGCF for carrying Incoming is sent to I-CSCF.
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| CN110708274A (en) * | 2018-07-10 | 2020-01-17 | 中兴通讯股份有限公司 | Domain selection method, device and storage medium of called service |
| CN111385870A (en) * | 2018-12-27 | 2020-07-07 | 中国移动通信集团辽宁有限公司 | Terminal calling method and communication system |
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| CN1913503A (en) * | 2005-08-08 | 2007-02-14 | 华为技术有限公司 | Control method and system of session route path |
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