CN104363573B - The communication means that a kind of VoLTE international roamings system using local break-out is realized - Google Patents
The communication means that a kind of VoLTE international roamings system using local break-out is realized Download PDFInfo
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- CN104363573B CN104363573B CN201410589841.0A CN201410589841A CN104363573B CN 104363573 B CN104363573 B CN 104363573B CN 201410589841 A CN201410589841 A CN 201410589841A CN 104363573 B CN104363573 B CN 104363573B
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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
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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
- H04W8/06—Registration at serving network Location Register, VLR or user mobility server
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Abstract
The invention provides the communication means that a kind of VoLTE international roamings system using local break-out is realized, belong to the communications field.The VoLTE international roaming systems of the local break-out, home network A and its visited network C including calling subscribe, the home network B and its visited network D of called subscriber, enhancing I CSCF network elements are provided with the visited network C of the calling subscribe, it can be handled local break-out information.Using the method for the present invention, without introducing the new network equipment, operation cost and maintenance cost are reduced；Moreover, network more flattening, the network element number for handling message is reduced, while reduces the average duration of calling.
Description
Technical field
The invention belongs to the communications field, and in particular to a kind of in the case of VoLTE international roamings is using local break-out
The communication means that VoLTE international roamings system is realized.
Background technology
VoLTE is the speech business based on IMS.IMS turns into complete due to supporting a variety of accesses and abundant multimedia service
The core net standard architecture in IP epoch.After years of mature development, IMS is defined as moving by 3GPP and GSMA
The standard architecture of dynamic voice.VoLTE is Voice over LTE, and it is a kind of IP data transmission technologies, without 2G/3G nets, entirely
Data and unification of the speech business under consolidated network can be achieved on 4G networks in portion's service bearer.
By in August, 2013, the whole world one shares 456 LTE networks, wherein containing 213 commercial networks；Along with
The release of LTE commercial services, global LTE total numbers of users have also reached 1.26 hundred million.As popularizations of the LTE in the whole world, the world are unrestrained
An indispensable part of the trip business as customer experience, the concern of industry is caused, each side all makes joint efforts to be found for it
One best solution.One of the key technology of VoLTE international roamings as LTE, if processing is unreasonable, it can dive
IMS deployment is influenceed on ground.Therefore, VoLTE international roaming services turn into an important and urgent research topic.
Current international roaming technology mainly includes：Current circuit domain international roaming and early stage it is jejune
VoLTE international roamings.
1, current circuit domain international roaming
The framework of current circuit domain international roaming is as shown in Figure 1：User Alice roams to other networks, is successfully noting
After volume, calling is initiated, call request message need not be back to home network, and (now user is serviced is visited network
Interchanger, it is not necessary to the participation of home network interchanger), but directly route to called home network from visited network.When
The charging mode of preceding use is cascade charging, and cascade billing requirements have and must also have corresponding signaling on the path of Media Stream,
Otherwise charging can not be carried out to user.Current media on same paths, in the absence of any problem, meet all with signaling
Demand, although Media Stream is not Optimization route.
2, the VoLTE international roamings of early stage
The VoLTE international roaming frameworks of early stage are as shown in Figure 2：User Alice roams to visited network C, in successful registration
Afterwards, initiate to call to user Bob, call request message is back to home network A, enters call request message by home network
The follow-up route of row.
In early stage current circuit domain international roaming scene, what roaming service customer was serviced is the network element of visited network, but
It is due to that VoLTE is the speech business based on IMS, in VoLTE international roaming scenes, what roaming service customer was serviced is to return
Belong to the S-CSCF network elements of network, this call request message for resulting in roaming service customer must be routed back to home network, and circuit domain
International roaming simultaneously need not.This is both maximum differences, while is also the most basic reason that local break-out pattern introduces.
The shortcomings that system is that charging can not be carried out in existing network.Because circuit domain roaming for a long time is using cascade
Charging mode, the path which requirement has Media Stream must have corresponding signaling.The VoLTE international roamings of early stage, due to language
Sound is different from the path of signalling route and can not carry out charging, and this causes the VoLTE international roamings framework of early stage can not be in existing network
In directly build, so the framework can not be disposed in existing network.
The advantages of system is that media route is optimal, it is not necessary to by called home network.
3, improved VoLTE international roamings
Improved VoLTE international roamings are as shown in Figure 3：When roaming service customer initiates calling, call request message and Media Stream
Home network is back to simultaneously, then carries out signaling and the in general call routing flow of media in home network.With early stage
VoLTE international roamings compare, and improved VoLTE international roamings biggest advantage is IPX of the sip message by processing voice,
Charging can be carried out to voice, therefore directly can build and use in existing network.
The shortcomings that this method is that media route is bad, and Media Stream needs to be back to home network, Ran Houjin from visited network
The follow-up in general call routing flow of row, this aspect exacerbates the burden of go-between, when on the one hand increasing voice transfer
Between, reduce the experience of user.
4, carry out the VoLTE international roamings of media optimization
Carry out media optimization VoLTE international roamings as shown in figure 4, the program have in the 3 gpp specifications correlation explanation,
General flow is as follows：1) user is in roaming place successful registration 2) user initiates the PCSCF of calling 3) visited network and receives this
Call request message, the address of TRF network elements is added for the call request message (to be needed the network element newly added, is returned for handling
To the call request message of visited network), it then will route the request to the home network of calling subscribe.4) home network receives
After call request message, routing decision is carried out, the TRF then request route being back in message.5) TRF receives this and asked
Ask, carry out follow-up in general call routing flow.
The advantages of this method is, medium surface can be optimized under the premise of charging.Shortcoming is：1) need to draw
Enter the new network equipment, improve operation cost and maintenance cost.2) new network node is introduced, handles the NE No. of message
Mesh increase, extends the average time for establishing calling.
The content of the invention
In order to make up two deficiencies present in above-mentioned framework, the VoLTE that the present invention proposes a kind of local break-out is international
Roaming system and method, while the local break-out decision logic of home network is refined.
A kind of VoLTE international roaming systems of local break-out, including：
The home network A and its visited network C of calling subscribe, the home network B and its visited network D of called subscriber；
Enhancing I-CSCF network elements are provided with the visited network C of the calling subscribe, it can enter to local break-out information
Row processing.
Be equipped with the home network A of the calling subscribe and the home network B of called subscriber S-CSCF network elements or
Application server；
P-CSCF network elements are provided with the visited network D of the called subscriber.
The communication means realized using the VoLTE international roamings system of the local break-out, including：
(1), start；
(2), calling subscribe roams to its visited network C, successfully completes registration；
(3), called subscriber roams to its visited network D, successfully completes registration；
(4), calling subscribe initiates to call in visited network C, calls called subscriber, and call request message is routed to visit
The P-CSCF network elements of network C；
(5), visited network C P-CSCF NE Discovery call request messages are not from this domain user, but from unrestrained
After the calling for swimming user, if visited network C supports local break-out pattern, header field field is added in call request message
Feature-Caps:+ g.3gpp.trf, its value is local break-out address, i.e. the ground of enhancing I-CSCF network elements in visited network C
Location, then the call request message is routed to the home network A of calling subscribe, be then transferred to step (6)；If visited network C
Local break-out pattern is not supported, then the call request message is directly routed to the home network A of calling subscribe, is then transferred to step
Suddenly (6)；
(6) after, the home network A of calling subscribe S-CSCF network elements or application server receive call request message,
Local break-out decision-making is carried out, if taking local break-out pattern, is transferred to step (7)；If not taking local break-out pattern, it is transferred to
Step (8)；
(7), the home network A of calling subscribe S-CSCF network elements or application server add in call request message
Local break-out identifies, and shows that the request is a local break-out message with this, and then by call request message, (also known as calling is believed
Make) enhancing I-CSCF network elements corresponding to the local break-out address carried into message are sent, namely handle makes call request message return
Visited network C is back to, is then transferred to step (9)；
(8), the home network A of calling subscribe S-CSCF network elements or application server delete Feature-Caps:+
G.3gpp.trf header field field, then it is transferred to step (10)；
(9), the call request message of calling subscribe is back to visited network C enhancing I-CSCF network elements, enhancing I-
CSCF network elements are handled call request message；
(10), the call request message is route according in general Message routing mechanism.
Local break-out decision-making in the step (6) includes：
(61) check whether visited network supports local break-out：
Check local break-out address whether is carried in call request message, if not carrying, according in general message road
The call request message is route by mechanism, without local break-out, is then transferred to step (64)；If carrying, show
Visited network C supports local break-out, is transferred to step (62)；
(62) check whether home network A itself supports local break-out:
By inquiring the HSS in this domain or inquiring about the configuration file in this domain, check whether home network A itself supports local
Dredge, if not supporting local break-out, without local break-out, be then transferred to step (64), if supporting local break-out, show
Visited network C and home network A support local break-out, are transferred to step (63)；
(63) in the case where visited network C and home network A support local break-out, can not enter if called subscriber belongs to
The situation of row local break-out, then without local break-out, step (64) is then transferred to, if being not belonging to that local break-out can not be carried out
Situation, then carry out local break-out；
(64) local break-out decision-making terminates；
The situation of local break-out can not be carried out in the step (63) to be included：
Home network A, visited network C have the situation of specific demand；
Home network A provides that the situation of local break-out can not be carried out to special group.
Enhancing I-CSCF network elements carry out processing to call request message in the step (9) includes：
(91) strengthen I-CSCF and check local break-out mark whether is carried in call request message, if carrying, go to step
Suddenly (92), step (93) is otherwise gone to；
(92) the local break-out mark in message is deleted, then goes to step (94)；
(93) check whether the called of the call request message belongs to visited network C, if it is, step (10) is transferred to,
Otherwise the message is abandoned, it is without any processing；
(94) follow-up in general call routing flow is carried out.
Compared with prior art, the beneficial effects of the invention are as follows：
1) in VolTE international roamings, (the journey that home network and visited network are supported local break-out under different scenes
Spend it is similar and different in the case of), home network can enable roaming service customer normally to be conversed according to certain strategy.
2) the new network equipment need not be introduced, reduces operation cost and maintenance cost.
3) network more flattening, the network element number for handling message is reduced, while reduces the average duration of calling.
Brief description of the drawings
Circuit domain international roaming configuration diagram current Fig. 1
The VoLTE international roaming configuration diagrams of Fig. 2 early stages
The improved VoLTE international roamings configuration diagrams of Fig. 3
Fig. 4 carries out the VoLTE international roaming configuration diagrams of media optimization
Fig. 5 VoLTE international roamings schematic flow sheets of the present invention
Home network S-CSCF carries out local break-out decision flow diagram in Fig. 6 present invention
Fig. 7 VoLTE international roamings configuration diagrams of the present invention
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings：
The core concept of the inventive method is：As shown in fig. 7, in VoLTE international roaming scenes, by TRF network elements
Logic realization migrate to I-CSCF network elements, local break-out message is handled by the I-CSCF network elements strengthened；Refine ownership simultaneously
The logic of the local break-out decision-making of network S-CSCF or application server, make roaming service customer in different scenes, can
Carry out normal session.
A kind of local break-out scene of the present invention as shown in figure 5, the scene is related to 4 networks, calling subscribe Alice's
Home network A and its visited network C, the home network B and its visited network D of called subscriber.Important net of the present invention
Member is the enhancing I-CSCF network elements in S-CSCF or application server and visited network in calling subscribe's home network, wherein
S-CSCF or application server have increased local break-out decision logic newly, and the I-CSCF network elements of enhancing have increased processing local break-out newly
The logic control of message.
The groundwork step that the present invention includes is as follows：
(1), start；
(2), calling subscribe roams to visited network, successfully completes registration；
(3), called subscriber also successfully completes registration；
(4), calling subscribe initiates to call in visited network, calls called subscriber, and call request message routes to visit net
The P-CSCF network elements of network；
(5), the P-CSCF NE Discovery call request messages of visited network are not from this domain user, but from roaming
The calling of user.Now, if visited network supports local break-out pattern, header field field is added in call request message
Feature-Caps:+ g.3gpp.trf, its value is that this domain enhancing I-CSCF network elements (do what is subsequently route for local break-out message
Network element) address, then carry out follow-up in general call routing flow；If visited network does not support local break-out pattern, directly
Carry out follow-up in general call routing flow.The call request message is routed to calling subscribe's home network by visited network, so
After be transferred to step (6)；
(6), the S-CSCF of calling subscribe's home network or application server network element receive call request message, carry out this
Decision-making is dredged on ground, if taking local break-out pattern, is transferred to step (7)；If not taking local break-out pattern, step is transferred to
(8)；
(7), calling subscribe's home network S-CSCF or application server add local break-out in call request message
Mark, shows that the request is a local break-out message with this.Call signaling is sent to the local break-out that is carried into message
The network element of location, namely calling request message is back to roaming place.Then it is transferred to step (9)；
(8), the S-CSCF of calling subscribe's home network or application server network element delete Feature-Caps:+
G.3gpp.trf header field field, then it is transferred to step (10)；
(9), calling request message is back to the enhancing I-CSCF, I-CSCF of roaming place to message progress relevant treatment
Afterwards, in general call routing is carried out to call request message；
(10), the call request message is route according in general Message routing mechanism.
As shown in fig. 6, the logic of the local break-out decision-making in described (6) step is specific as follows：
(61) check whether visited network supports local break-out：
Check local break-out address whether is carried in call request message, if not carrying, carry out in general calling road
By flow, without local break-out.If carrying, show that visited network supports local break-out, thus Media Stream have optimization can
Energy property, goes to step (62) and is further processed；
(62) check whether home network itself supports local break-out:
By inquiring the HSS in this domain or inquiring about the associated profile in this domain, check whether home network itself is supported
Local break-out, if local break-out is not supported in this domain, without local break-out.If local break-out is supported in this domain, show to visit
Network and home network all support local break-out, go to (63) and are further processed；
(63) in the case where visited network and home network all support local break-out, if called subscriber belongs to home network
Network, visited network have specific demand (such as home network has in the case of relevant regulations to special group without local break-out,
Relevant regulations are such as：The national requirements operator of home network carries out audio monitoring to specific user, now requires that Media Stream must
Home network must be passed through, therefore local break-out can not be carried out), carry out follow-up in general call routing flow.In the case of other, enter
Row local break-out；
(64) local break-out decision-making terminates；
The processing logic that caller visited network I-CSCF network elements in described (9) step receive call request message is specific such as
Under：
(91) I-CSCF first checks for whether the message is that local break-out message (is checked in message and whether carries local break-out
Mark), if local break-out message, then step (92) is gone to, otherwise directly go to step (93).The step is also that I-CSCF is needed
Want increased message processing logic；
(92) the local break-out mark in message is deleted, then goes to step (94)；
(93) check whether the called of the call request message belongs to visited network or roam to visited network, if
Step (94) is gone to, otherwise abandons the message, it is without any processing；
(94) follow-up in general call routing flow is carried out；
Above-mentioned technical proposal is a kind of local break-out scene embodiment of the present invention, for technology people in the art
For member, on the basis of the invention discloses application process and principle, it is easy to various types of improvement or deformation are made, and
The method described by the above-mentioned embodiment of the present invention is not limited only to, therefore previously described mode is simply preferable, and simultaneously
Without restricted meaning.
Claims (3)
- A kind of 1. communication means that VoLTE international roamings system using local break-out is realized, it is characterised in that：Methods described bag Include：(1), start；(2), calling subscribe roams to its visited network C, successfully completes registration；(3), called subscriber roams to its visited network D, successfully completes registration；(4), calling subscribe initiates to call in visited network C, calls called subscriber, and call request message is routed to visited network C P-CSCF network elements；(5), visited network C P-CSCF NE Discovery call request messages are not from this domain user, but are used from roaming After the calling at family, if visited network C supports local break-out pattern, header field field Feature- is added in call request message Caps:+ g.3gpp.trf, its value is local break-out address, i.e. the address of enhancing I-CSCF network elements in visited network C, then The call request message is routed to the home network A of calling subscribe, is then transferred to step (6)；If visited network C does not support this Pattern is dredged on ground, then the call request message is directly routed to the home network A of calling subscribe, is then transferred to step (6)；(6) after, the home network A of calling subscribe S-CSCF network elements or application server receive call request message, carry out Local break-out decision-making, if taking local break-out pattern, it is transferred to step (7)；If not taking local break-out pattern, step is transferred to (8)；(7), the home network A of calling subscribe S-CSCF network elements or application server add local in call request message Mark is dredged, shows that the request is a local break-out message with this, then call request message is sent and carried into message Local break-out address corresponding to enhancing I-CSCF network elements, namely making call request message be back to visited network C, Ran Houzhuan Enter step (9)；(8), the home network A of calling subscribe S-CSCF network elements or application server delete Feature-Caps:+ G.3gpp.trf header field field, then it is transferred to step (10)；(9), the call request message of calling subscribe is back to visited network C enhancing I-CSCF network elements, enhancing I-CSCF nets Member is handled call request message；(10), the call request message is route according in general Message routing mechanism；Wherein, the local break-out decision-making in the step (6) includes：(61) check whether visited network supports local break-out：Check local break-out address whether is carried in call request message, if not carrying, according in general message router System is route to the call request message, without local break-out, is then transferred to step (64)；If carrying, show to visit Network C supports local break-out, is transferred to step (62)；(62) check whether home network A itself supports local break-out:By inquiring the HSS in this domain or inquiring about the configuration file in this domain, check whether home network A itself supports local dredge Lead, if not supporting local break-out, without local break-out, be then transferred to step (64), if supporting local break-out, show to visit Visit network C and home network A supports local break-out, be transferred to step (63)；(63) in the case where visited network C and home network A support local break-out, if called subscriber, which belongs to, can not carry out this The situation that ground is dredged, then without local break-out, step (64) is then transferred to, if being not belonging to carry out the feelings of local break-out Condition, then carry out local break-out；(64) local break-out decision-making terminates.
- 2. according to the method for claim 1, it is characterised in that：The situation of local break-out can not be carried out in the step (63) Including：Home network A, visited network C have the situation of specific demand；Home network A provides that the situation of local break-out can not be carried out to special group.
- 3. according to the method for claim 1, it is characterised in that：Enhancing I-CSCF network elements please to calling in the step (9) Asking message to carry out processing includes：(91) strengthen I-CSCF and check local break-out mark whether is carried in call request message, if carrying, go to step (92) step (93), is otherwise gone to；(92) the local break-out mark in message is deleted, then goes to step (94)；(93) check whether the called of the call request message belongs to visited network C, if it is, being transferred to step (10), otherwise The message is abandoned, it is without any processing；(94) follow-up in general call routing flow is carried out.
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| CN106550456B (en) * | 2015-09-17 | 2019-08-20 | 中国移动通信集团公司 | A kind of method, apparatus and application server of signaling paths optimization |
| CN105916131B (en) * | 2016-03-30 | 2020-09-25 | 联想(北京)有限公司 | Access control method and device |
| CN109246769B (en) * | 2017-05-05 | 2020-10-09 | 华为技术有限公司 | PDU session establishment method and device |
| CN109429272B (en) * | 2017-08-31 | 2022-02-11 | 华为技术有限公司 | Shunting method in roaming scene and related equipment |
| CN111200809B (en) * | 2018-11-20 | 2022-04-26 | 中国电信股份有限公司 | Method, gateway and system for realizing VOLTE terminal international roaming service |
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| CN101325543A (en) * | 2007-06-15 | 2008-12-17 | 华为技术有限公司 | Method, entity and system for implementing network address conversion |
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| CN101325543A (en) * | 2007-06-15 | 2008-12-17 | 华为技术有限公司 | Method, entity and system for implementing network address conversion |
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