CN104363573A - VoLTE international roam system and method for loopback - Google Patents
VoLTE international roam system and method for loopback Download PDFInfo
- Publication number
- CN104363573A CN104363573A CN201410589841.0A CN201410589841A CN104363573A CN 104363573 A CN104363573 A CN 104363573A CN 201410589841 A CN201410589841 A CN 201410589841A CN 104363573 A CN104363573 A CN 104363573A
- Authority
- CN
- China
- Prior art keywords
- local break
- network
- request message
- call request
- cscf
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- 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
Abstract
The invention discloses a VoLTE international roam system and a VoLTE international roam method for loopback, and belongs to the communication field. The VoLTE international roam system for the loopback comprises a home network A of a calling party and a visited network thereof, a home network B of a called party and a visited network D thereof, wherein the visited network C of the calling party is provided with a strengthened I-CSCF (Interrogating Call Session Control Function) NE (Network Element) capable of processing the loopback information. By adopting the system and method provided by the invention, the operational cost and maintenance cost can be reduced without any new network equipment; furthermore, the network is more flatten, the number of the NEs for processing the information can be reduced, and the average duration for calling can be reduced at the same time.
Description
Technical field
The invention belongs to the communications field, be specifically related to the VoLTE international roaming system and method for a kind of local break-out in VoLTE international roaming situation.
Background technology
VoLTE is the speech business based on IMS.IMS, owing to supporting multiple access and abundant multimedia service, becomes the core net standard architecture in all-IP epoch.After experienced by the past few years full-fledged, IMS has been defined as the standard architecture of mobile voice by 3GPP and GSMA.VoLTE and Voice oVer LTE, it is a kind of IP data transmission technology, and without the need to 2G/3G net, whole service bearer, on 4G network, can realize data and the unification of speech business under consolidated network.
By in August, 2013, the whole world one has 456 LTE network, wherein contains 213 commercial network; Along with the release of LTE commercial service, the LTE total number of users in the whole world also reaches 1.26 hundred million.Along with LTE popularizing in the whole world, international roaming service, as an indispensable part for customer experience, causes the concern of industry, and each side all makes joint efforts as it finds a best solution.VoLTE international roaming, as one of the key technology of LTE, if process is unreasonable, can affect the deployment of IMS potentially.Therefore, VoLTE international roaming service becomes an important and urgent research topic.
Current international roaming technology mainly comprises: current circuit domain international roaming and early stage jejune VoLTE international roaming.
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, after a successful registration, make a call, without the need to being back to home network, (what now serve user is the switch of visited network to call request message, do not need the participation of home network switch), but directly route to called home network from visited network.The charging way of current employing is cascade charging, and cascade billing requirements has on the path of Media Stream also must have corresponding signaling, otherwise cannot carry out charging to user.On same path, there is not any problem in current media and signaling, meets all demands, although Media Stream is not Optimization route.
2, early stage VoLTE international roaming
Early stage VoLTE international roaming framework is as shown in Figure 2: user Alice roams to visited network C, after a successful registration, make a call to user Bob, call request message is back to home network A, carries out follow-up route by home network to call request message.
In early stage current circuit domain international roaming scene, what serve roamer is the network element of visited network, but due to the speech business that VoLTE is based on IMS, in VoLTE international roaming scene, what serve roamer is the S-CSCF network element of home network, this just causes the call request message of roamer route must return home network, and circuit domain international roaming does not need.This is both maximum differences, is also the most basic reason that local break-out pattern is introduced simultaneously.
The shortcoming of this system cannot carry out charging in existing network.Due to the employing of circuit domain roaming is for a long time cascade charging way, and must there be corresponding signaling in the path which requires Media Stream.Early stage VoLTE international roaming, because voice are different from the path of signalling route and cannot carry out charging, this causes early stage VoLTE international roaming framework directly cannot build in existing network, so this framework cannot be disposed in existing network.
The advantage of this system is that media route is best, does not need through called home network.
3, the VoLTE international roaming of improvement
Improve VoLTE international roaming as shown in Figure 3: when roamer makes a call, call request message and Media Stream are back to home network simultaneously, then carry out the general call routing flow process of signaling and media at home network.Compared with early stage VoLTE international roaming, the advantage that the VoLTE international roaming of improvement is maximum is the IPX of sip message through processed voice, can carry out charging, therefore can directly build in existing network and use voice.
The shortcoming of the method is that media route is not good, Media Stream needs to be back to home network from visited network, then carries out follow-up general call routing flow process, and this exacerbates the burden of go-between on the one hand, increase the voice transfer time on the one hand, reduce the experience of user.
4, carry out the VoLTE international roaming of media optimization
Carry out the VoLTE international roaming of media optimization as shown in Figure 4, the program has relevant explanation in the 3 gpp specifications, general flow process is as follows: 1) user is at roaming place successful registration 2) user makes a call 3) PCSCF of visited network receives this call request message, the address of adding TRF network element for this call request message (needs the new network element added, call request message for the treatment of being back to visited network), then will route the request to the home network of calling subscriber.4) after home network receives call request message, carry out routing decision, then this Request routing is back to the TRF in message.5) TRF receives this request, carries out follow-up general call routing flow process.
The advantage of the method is, under the prerequisite of charging, can be optimized medium surface.Shortcoming is: 1) need to introduce the new network equipment, improve operation cost and maintenance cost.2) introduce new network node, the network element number of processing messages increases, and extends the average time of setting up calling.
Summary of the invention
In order to make up two deficiencies existed in above-mentioned framework, the present invention proposes a kind of VoLTE international roaming system and method for local break-out, refinement having been carried out to the local break-out decision logic of home network simultaneously.
A VoLTE international roaming system for local break-out, comprising:
The home network A of calling subscriber and visited network C thereof, the home network B of called subscriber and visited network D thereof;
The visited network C of described calling subscriber is provided with and strengthens I-CSCF network element, it can process local break-out information.
The home network A of described calling subscriber and the home network B of called subscriber are equipped with S-CSCF network element or application server;
The visited network D of described called subscriber is provided with P-CSCF network element.
The communication means utilizing the VoLTE international roaming system of described local break-out to realize, comprising:
(1), start;
(2), calling subscriber roams to its visited network C, is successfully completed registration;
(3), called subscriber roams to its visited network D, is successfully completed registration;
(4), calling subscriber makes a call at visited network C, calling called subscriber, and call request message is routed to the P-CSCF network element of visited network C;
(5), the P-CSCF NE Discovery call request message of visited network C is not from this territory user, but from after the calling of roamer, if visited network C supports local break-out pattern, then in call request message, add header field field Feature-Caps:+g.3gpp.trf, its value is local break-out address, the address of the enhancing I-CSCF network element namely in visited network C, then this call request message is routed to the home network A of calling subscriber, then proceed to step (6); If visited network C does not support local break-out pattern, then the direct home network A this call request message being routed to calling subscriber, then proceeds to step (6);
(6), after the S-CSCF network element of the home network A of calling subscriber or application server receive call request message, carry out local break-out decision-making, if take local break-out pattern, then proceed to step (7); If do not take local break-out pattern, then proceed to step (8);
(7), the S-CSCF network element of the home network A of calling subscriber or application server add local break-out mark in call request message, show that this request is a local break-out message with this, then call request message (being also called call signaling) is sent to the enhancing I-CSCF network element that the local break-out address of carrying in message is corresponding, also namely making call request message be back to visited network C, step (9) is then proceeded to;
(8), Feature-Caps:+g.3gpp.trf header field field deleted by the S-CSCF network element of the home network A of calling subscriber or application server, then proceeds to step (10);
(9), the call request message of calling subscriber is back to the enhancing I-CSCF network element of visited network C, and this enhancing I-CSCF network element processes call request message;
(10), according to general Message routing mechanism, route is carried out to this call request message.
Local break-out decision-making in described step (6) comprises:
(61) check whether visited network supports local break-out:
Check in call request message and whether carry local break-out address, if do not carry, then according to general Message routing mechanism, route is carried out to this call request message, do not carry out local break-out, then proceed to step (64); If carry, then show that visited network C supports local break-out, proceed to step (62);
(62) check whether home network A self supports local break-out:
By inquiring the HSS in this territory or inquiring about the configuration file in this territory, check whether home network A self supports local break-out, if do not support local break-out, then do not carry out local break-out, then step (64) is proceeded to, if support local break-out, then show that visited network C and home network A supports local break-out, proceed to step (63);
(63) when visited network C and home network A supports local break-out, if called subscriber belongs to the situation can not carrying out local break-out, then do not carry out local break-out, then step (64) is proceeded to, if do not belong to the situation can not carrying out local break-out, then carry out local break-out;
(64) local break-out decision-making terminates;
The situation can not carrying out local break-out in described step (63) comprises:
Home network A, visited network C have the situation of specific demand;
Home network A specifies to special group the situation can not carrying out local break-out.
Described step (9) middle enhancing I-CSCF network element carries out process to call request message and comprises:
(91) strengthen I-CSCF and check in call request message whether carry local break-out mark, if carry, then go to step (92), otherwise go to step (93);
(92) delete the local break-out mark in message, then go to step (94);
(93) check whether the called of this call request message belongs to visited network C, if so, then proceed to step (10), otherwise abandon this message, be left intact;
(94) follow-up general call routing flow process is carried out.
Compared with prior art, the invention has the beneficial effects as follows:
1) in VolTE international roaming, under different scenes (when the degree supported local break-out of home network and visited network is similar and different), home network can enable roamer converse normally according to certain strategy.
2) without the need to introducing the new network equipment, operation cost and maintenance cost is reduced.
3) network flattening more, the network element decreased number of processing messages, reduces the average duration of calling simultaneously.
Accompanying drawing explanation
The circuit domain international roaming configuration diagram that Fig. 1 is current
The VoLTE international roaming configuration diagram that Fig. 2 is early stage
The VoLTE international roaming configuration diagram that Fig. 3 improves
Fig. 4 carries out the VoLTE international roaming configuration diagram of media optimization
Fig. 5 VoLTE international roaming of the present invention schematic flow sheet
In Fig. 6 the present invention, home network S-CSCF carries out local break-out decision flow diagram
Fig. 7 VoLTE international roaming of the present invention configuration diagram
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
The core concept of the inventive method is: as shown in Figure 7, in VoLTE international roaming sight, the logic realization in TRF network element is migrated to I-CSCF network element, by the I-CSCF network element strengthened to process local break-out message; The logic of the local break-out decision-making of refinement home network S-CSCF or application server, makes roamer in different scenes, can carry out normal session simultaneously.
As shown in Figure 5, this scene relates to 4 networks to a kind of local break-out scene of the present invention, the home network A of calling subscriber Alice and visited network C thereof, the home network B of called subscriber and visited network D thereof.The important network element that the present invention relates to is the enhancing I-CSCF network element in S-CSCF in calling subscriber's home network or application server and visited network, wherein S-CSCF or application server have increased local break-out decision logic newly, and the I-CSCF network element of enhancing has increased the logic control of process local break-out message newly.
The groundwork step that the present invention comprises is as follows:
(1), start;
(2), calling subscriber roams to visited network, is successfully completed registration;
(3), called subscriber is also successfully completed registration;
(4), calling subscriber makes a call at visited network, calling called subscriber, and call request message routes to the P-CSCF network element of visited network;
(5), the P-CSCF NE Discovery call request message of visited network not from this territory user, but from the calling of roamer.Now, if visited network supports local break-out pattern, then in call request message, add header field field Feature-Caps:+g.3gpp.trf, its value strengthens I-CSCF network element (for local break-out message does the network element of follow-up route) address for this territory, then carries out follow-up general call routing flow process; If visited network does not support local break-out pattern, then directly carry out follow-up general call routing flow process.This call request message is routed to calling subscriber's home network by visited network, then proceeds to step (6);
(6), S-CSCF or the application server network element of calling subscriber's home network receive call request message, carry out local break-out decision-making, if take local break-out pattern, then proceed to step (7); If do not take local break-out pattern, then proceed to step (8);
(7), calling subscriber's home network S-CSCF or application server add local break-out mark in call request message, show that this request is a local break-out message with this.Call signaling is sent to the network element of the local break-out address of carrying in message, also namely calling request message is back to roaming place.Then step (9) is proceeded to;
(8), the S-CSCF of calling subscriber's home network or application server network element delete Feature-Caps:+g.3gpp.trf header field field, then proceed to step (10);
(9), calling request message is back to the enhancing I-CSCF of roaming place, and I-CSCF carries out general call routing to call request message after carrying out relevant treatment to message;
(10), according to general Message routing mechanism, route is carried out to this call request message.
As shown in Figure 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 in call request message and whether carry local break-out address, if do not carry, then carry out general call routing flow process, do not carry out local break-out.If carry, then show that visited network supports local break-out, therefore Media Stream has the possibility of optimization, goes to step (62) and is further processed;
(62) check whether home network self supports local break-out:
By inquiring the HSS in this territory or inquiring about the associated profile in this territory, check whether home network self supports local break-out, if local break-out is not supported in this territory, does not then carry out local break-out.If local break-out is supported in this territory, then show that visited network and home network all support local break-out, go to (63) and be further processed;
(63) when visited network and home network all support local break-out, if called subscriber belongs to home network, visited network has specific demand, (such as home network has when relevant regulations special group and does not carry out local break-out, relevant regulations is such as: the national requirements operator of home network carries out audio monitoring to specific user, now require that Media Stream has to pass through home network, therefore local break-out can not be carried out), carry out follow-up general call routing flow process.In other situations, carry out local break-out;
(64) local break-out decision-making terminates;
The processing logic that caller visited network I-CSCF network element in described (9) step receives call request message is specific as follows:
(91) first I-CSCF checks whether this message is local break-out message (check in message and whether carry local break-out mark), if local break-out message, then go to step (92), otherwise directly go to step (93).This step is also the message processing logic that I-CSCF needs to increase;
(92) delete the local break-out mark in message, then go to step (94);
(93) check whether the called of this call request message belongs to visited network or roam to visited network, if go to step (94), otherwise abandon this message, be left intact;
(94) follow-up general call routing flow process is carried out;
Technique scheme is a kind of local break-out scene execution mode of the present invention, for those skilled in the art, on the basis that the invention discloses application process and principle, be easy to make various types of improvement or distortion, and the method be not limited only to described by the above-mentioned embodiment of the present invention, therefore previously described mode is just preferred, and does not have restrictive meaning.
Claims (6)
1. the VoLTE international roaming system of a local break-out, comprise home network A and the visited network C thereof of calling subscriber, the home network B of called subscriber and visited network D thereof, it is characterized in that: be provided with on the visited network C of described calling subscriber and strengthen I-CSCF network element, it can process local break-out information.
2. the VoLTE international roaming system of local break-out according to claim 1, is characterized in that: on the home network A of described calling subscriber and the home network B of called subscriber, be equipped with S-CSCF network element or application server;
The visited network D of described called subscriber is provided with P-CSCF network element.
3. the communication means utilizing the VoLTE international roaming system of local break-out described in claim 1 or 2 to realize, is characterized in that: described method comprises:
(1), start;
(2), calling subscriber roams to its visited network C, is successfully completed registration;
(3), called subscriber roams to its visited network D, is successfully completed registration;
(4), calling subscriber makes a call at visited network C, calling called subscriber, and call request message is routed to the P-CSCF network element of visited network C;
(5), the P-CSCF NE Discovery call request message of visited network C is not from this territory user, but from after the calling of roamer, if visited network C supports local break-out pattern, then in call request message, add header field field Feature-Caps:+g.3gpp.trf, its value is local break-out address, the address of the enhancing I-CSCF network element namely in visited network C, then this call request message is routed to the home network A of calling subscriber, then proceed to step (6); If visited network C does not support local break-out pattern, then the direct home network A this call request message being routed to calling subscriber, then proceeds to step (6);
(6), after the S-CSCF network element of the home network A of calling subscriber or application server receive call request message, carry out local break-out decision-making, if take local break-out pattern, then proceed to step (7); If do not take local break-out pattern, then proceed to step (8);
(7), the S-CSCF network element of the home network A of calling subscriber or application server add local break-out mark in call request message, show that this request is a local break-out message with this, then call request message is sent to the enhancing I-CSCF network element that the local break-out address of carrying in message is corresponding, also namely making call request message be back to visited network C, step (9) is then proceeded to;
(8), Feature-Caps:+g.3gpp.trf header field field deleted by the S-CSCF network element of the home network A of calling subscriber or application server, then proceeds to step (10);
(9), the call request message of calling subscriber is back to the enhancing I-CSCF network element of visited network C, and this enhancing I-CSCF network element processes call request message;
(10), according to general Message routing mechanism, route is carried out to this call request message.
4. method according to claim 3, is characterized in that: the local break-out decision-making in described step (6) comprises:
(61) check whether visited network supports local break-out:
Check in call request message and whether carry local break-out address, if do not carry, then according to general Message routing mechanism, route is carried out to this call request message, do not carry out local break-out, then proceed to step (64); If carry, then show that visited network C supports local break-out, proceed to step (62);
(62) check whether home network A self supports local break-out:
By inquiring the HSS in this territory or inquiring about the configuration file in this territory, check whether home network A self supports local break-out, if do not support local break-out, then do not carry out local break-out, then step (64) is proceeded to, if support local break-out, then show that visited network C and home network A supports local break-out, proceed to step (63);
(63) when visited network C and home network A supports local break-out, if called subscriber belongs to the situation can not carrying out local break-out, then do not carry out local break-out, then step (64) is proceeded to, if do not belong to the situation can not carrying out local break-out, then carry out local break-out;
(64) local break-out decision-making terminates.
5. method according to claim 4, is characterized in that: the situation can not carrying out local break-out in described step (63) comprises:
Home network A, visited network C have the situation of specific demand;
Home network A specifies to special group the situation can not carrying out local break-out.
6. method according to claim 3, is characterized in that: described step (9) middle enhancing I-CSCF network element carries out process to call request message and comprises:
(91) strengthen I-CSCF and check in call request message whether carry local break-out mark, if carry, then go to step (92), otherwise go to step (93);
(92) delete the local break-out mark in message, then go to step (94);
(93) check whether the called of this call request message belongs to visited network C, if so, then proceed to step (10), otherwise abandon this message, be left intact;
(94) follow-up general call routing flow process is carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410589841.0A CN104363573B (en) | 2014-10-28 | 2014-10-28 | The communication means that a kind of VoLTE international roamings system using local break-out is realized |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410589841.0A CN104363573B (en) | 2014-10-28 | 2014-10-28 | The communication means that a kind of VoLTE international roamings system using local break-out is realized |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104363573A true CN104363573A (en) | 2015-02-18 |
| CN104363573B CN104363573B (en) | 2017-12-22 |
Family
ID=52530786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410589841.0A Active CN104363573B (en) | 2014-10-28 | 2014-10-28 | The communication means that a kind of VoLTE international roamings system using local break-out is realized |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104363573B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105916131A (en) * | 2016-03-30 | 2016-08-31 | 联想(北京)有限公司 | Access control method and access control deice |
| CN106550456A (en) * | 2015-09-17 | 2017-03-29 | 中国移动通信集团公司 | A kind of method of signaling paths optimization, device and application server |
| WO2018201989A1 (en) * | 2017-05-05 | 2018-11-08 | 华为技术有限公司 | Method and device for establishing pdu session |
| WO2019041937A1 (en) * | 2017-08-31 | 2019-03-07 | 华为技术有限公司 | Traffic offloading method and related apparatus in roaming scenario |
| CN111200809A (en) * | 2018-11-20 | 2020-05-26 | 中国电信股份有限公司 | Method, gateway and system for realizing VOLTE terminal international roaming service |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US20120226814A1 (en) * | 2007-12-20 | 2012-09-06 | Brian Stucker | Topology hiding of a network for an administrative interface between networks |
-
2014
- 2014-10-28 CN CN201410589841.0A patent/CN104363573B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US20120226814A1 (en) * | 2007-12-20 | 2012-09-06 | Brian Stucker | Topology hiding of a network for an administrative interface between networks |
Non-Patent Citations (2)
| Title |
|---|
| 3GPP: "3GPP TR 23.850 V11.0.0)", 《3GPP TR 23.850 V11.0.0》 * |
| ITSUMA TANAKA: "VoLTE Roaming and Standard Interconnection Standard Technology", 《NTT DOCOMO TECHNOLOGY JOURNAL》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106550456A (en) * | 2015-09-17 | 2017-03-29 | 中国移动通信集团公司 | A kind of method of signaling paths optimization, device and application server |
| 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 |
| CN105916131A (en) * | 2016-03-30 | 2016-08-31 | 联想(北京)有限公司 | Access control method and access control deice |
| WO2018201989A1 (en) * | 2017-05-05 | 2018-11-08 | 华为技术有限公司 | Method and device for establishing pdu session |
| WO2019041937A1 (en) * | 2017-08-31 | 2019-03-07 | 华为技术有限公司 | Traffic offloading method and related apparatus in roaming scenario |
| US11115801B2 (en) | 2017-08-31 | 2021-09-07 | Huawei Technologies Co., Ltd. | Traffic offloading method and related device in roaming scenario |
| CN111200809A (en) * | 2018-11-20 | 2020-05-26 | 中国电信股份有限公司 | Method, gateway and system for realizing VOLTE terminal international roaming service |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104363573B (en) | 2017-12-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101160881B (en) | Method and communication system for circuit domain users accessing IP multimedia subsystem | |
| RU2389142C1 (en) | Mobile communication method and system for transmitting information, relating to network capabilities | |
| CN1972254B (en) | Method and apparatus for interactive services between voice of terminal and multimedia | |
| CN1898972B (en) | Method and system for maintaining conversation continuity | |
| CN101161023B (en) | Span-domain routing method for a dual-mode terminal, registration system and method, gateway and signaling copy transmitter | |
| CN101568091B (en) | Method, system and equipment for providing service | |
| CN102687582B (en) | Switching delay is optimized | |
| EP2073479A1 (en) | Method and system for call continuity | |
| CN101931925B (en) | Method for one number connecting calling method and service control point | |
| CN101317438B (en) | Method and device for perceiving supplementary service executed by user | |
| CN104363573A (en) | VoLTE international roam system and method for loopback | |
| CN100571468C (en) | A kind of CS domain call ending system and method | |
| CN101090567B (en) | Calling service implementing method for voice calling continuous service | |
| CN105636006A (en) | 2G/3G core network interworking method and system in condition that terminal roams to 4G special network | |
| CN101772155A (en) | Canceling method of centralized service of IP (Internet Protocol) multimedia subsystem | |
| CN108156634B (en) | Service processing method, device and system | |
| CN100555994C (en) | Circuit domain call is routed to the method and system of packet domain | |
| CN101155340B (en) | Method and system for circuit field sensing IMS field conversation charging information | |
| CN101111003B (en) | Multimedia color ring system and its play method | |
| CN101155173B (en) | Method and system for circuit field sensing IMS field multimedia conversation media information | |
| CN101998333B (en) | Method and system for processing urgent attachment | |
| CN101998568B (en) | Method for realizing multi-session service continuity | |
| CN1913504B (en) | Route path control method, system and device | |
| CN101128060B (en) | IMS re-registration method for non IMS centralized service user device roaming | |
| CN109661011B (en) | IMS call routing method, device and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |