CN103107975B - Support communication means and the voice gateways of Multi-Subscriber Number - Google Patents
Support communication means and the voice gateways of Multi-Subscriber Number Download PDFInfo
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Abstract
The invention discloses a kind of communication means and the voice gateways of supporting Multi-Subscriber Number, wherein, the method comprises: 1) voice gateways receive the Client-initiated IP Multimedia System registration request being positioned at other country, according to registration request to domain name system server request dispatching optimal session boarder controller address; 2) domain name system server is according to the list of distribution requesting query Session Border Controller, and voice gateways are handed down in the optimal session boarder controller address obtained; 3) voice gateways initiate registration request according to optimal session boarder controller address to Session Border Controller.The communication means of support Multi-Subscriber Number of the present invention and voice gateways, according to the different talk business demands of user, achieve this user when being in foreign country, no matter dial or answer domestic toll telephone, still dial or answer overseas local phone, the cheap phone of rate can be dialed easily, meet client and reduce the needs that call rate realize communication exchange.
Description
Technical field
The present invention relates to voice call technology in the communications field, particularly, relate to the communication means and terminal of supporting Multi-Subscriber Number.
Background technology
At present, day by day close along with international economy and cultural connection, the commercial exchange of existing telephone subscriber between country variant and immigrant's activity are on the increase, the requirement of communication service low cost and communication terminal capability set reduction is improved constantly, particularly more and more higher to the demand of the networking telephone of high performance-price ratio.
The Chinese telephone subscriber of the existing other country that is in foreign country, had both needed to utilize the networking telephone to dial overseas call, and was in domestic kith and kin and kept in touch, and also needed to have the ability conversed with local call, kept linking up with overseas local personage.But, the solution of these two kinds of demands is realized by different modes respectively at present, as passed through PC accessing Internet, necessary network telephone software is installed, the network number of registration correspondence dials international long-distance telephone, by the overseas local PSTN system of POTS (PlainOldTelephoneService, Plain Old Telephone Service) telephone set access in family, directly dial local call in family in overseas.
In addition, in existing international communication network framework, if the phone number that the mobile operator in China registers is carried into overseas use, the international roaming problem of phone number can be related to again; If directly to overseas originating international trunk call, can be continued by international long-distance communication network (being generally PSTN); No matter adopt phone number international roaming or the mode adopting international long-distance to call out, all can produce the telephone charges of great number, make troubles to the user be in foreign country.
Summary of the invention
The object of the invention is, for being in foreign country in prior art and all logging in same Session Border Controller for the domestic call user of roaming state initiates a session request at every turn and affect the defect of service quality, to propose a kind of communication means and the voice gateways of supporting Multi-Subscriber Number.
For achieving the above object, according to an aspect of the present invention, a kind of communication means supporting Multi-Subscriber Number is provided.
According to the communication means of the support Multi-Subscriber Number of the embodiment of the present invention, comprising:
1) voice gateways receive the Client-initiated IP Multimedia System registration request being positioned at other country, according to registration request to domain name system server request dispatching optimal session boarder controller address;
2) domain name system server is according to the list of distribution requesting query Session Border Controller, and voice gateways are handed down in the optimal session boarder controller address obtained;
3) voice gateways initiate registration request according to optimal session boarder controller address to Session Border Controller.In technique scheme, this communication means also comprises:
4) voice gateways receive the Client-initiated call request being positioned at other country, judge the called number type of this calling according to call request;
5) if called number type is home country's number of user, the IP Multimedia System calling through Internet access user home country is then carried out the process that continues by voice gateways.
In technique scheme, this communication means also comprises:
6) if called number type is the local number of user place other country, the local communication network of calling access user place other country is then carried out the process that continues by voice gateways.
In technique scheme, this communication means also comprises:
7) voice gateways receive the call request of the calling number initiation being positioned at user home country, judge the called number type of this calling according to call request;
8) if called number type is the number that user registers at the IP Multimedia System of its home country, then call through and access the described IP Multimedia System of user home country successively and the mode of Internet continues;
9) if called number type is the local number of user place other country, then the mode calling through access international long-distance communication network is routed on the local communication network of user place other country;
Wherein, calling number is the herd number of IP Multimedia System.
In technique scheme, this communication means also comprises:
10) voice gateways receive the call request of the calling number initiation being positioned at user home country;
11) if the called number of call request is the local number of user place other country, then the mode calling through access international long-distance communication network is routed on the local communication network of user place other country;
Wherein, calling number is the non-registered number of IP Multimedia System.
In technique scheme, in described step 4) in, the called number type of calling is judged according to the national code mark of called number.
For achieving the above object, according to an aspect of the present invention, a kind of voice gateways supporting Multi-Subscriber Number are provided.
According to the voice gateways of the support Multi-Subscriber Number of the embodiment of the present invention, comprising:
Receive request module, for receiving the Client-initiated IP Multimedia System registration request being positioned at other country, according to registration request to domain name system server request dispatching optimal session boarder controller address;
Address accept module, for receiving the optimal session boarder controller address that domain name system server issues;
Registration request module, for initiating registration request according to optimal session boarder controller address to Session Border Controller.In technique scheme, these voice gateways also comprise:
Speech channel judge module, for receiving the Client-initiated call request being positioned at other country, judges the called number type of this calling according to call request;
Route access module, for continuing process to described calling according to called number type:
If called number type is home country's number of user, then the IP Multimedia System calling through Internet and access described user home country is carried out the process that continues;
If called number type is the local number of user place other country, then the local communication network of calling access user place other country is carried out the process that continues.
In technique scheme, these voice gateways also comprise:
Speech channel judge module, also for receiving the call request of the calling number initiation being positioned at user home country, judges the called number type of this calling according to call request;
Route access module, also for continuing process to described calling according to called number type:
If described called number type is the number that user registers at the IP Multimedia System of its home country, then calls through the IP Multimedia System of access user home country and the mode of Internet successively and continue;
If called number type is the local number of user place other country, then the mode calling through access international long-distance communication network is routed on the local communication network of user place other country;
Wherein, calling number is the herd number of described IP Multimedia System.
In technique scheme, these voice gateways also comprise:
Speech channel judge module, also for receiving the call request of the calling number initiation being positioned at user home country;
Route access module, if the local number for the called number of call request being also user place other country, then the mode calling through access international long-distance communication network is routed on the local communication network of user place other country;
Wherein, calling number is the non-registered number of IP Multimedia System.
In technique scheme, in speech channel judge module, judge the called number type of calling according to the national code mark of called number.
The communication means of the support Multi-Subscriber Number of various embodiments of the present invention and voice gateways, to have the user of domestic IMS registration identity and overseas local communication network registration identity simultaneously, according to the different talk business demands of user, achieve this user when being in foreign country, no matter dial or answer domestic toll telephone, still dial or answer overseas local phone, the cheap phone of rate can be dialed easily, meet client and reduce the needs that call rate realize communication exchange.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in write specification, claims and accompanying drawing and obtain.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is according to a kind of structural representation supporting Multi-Subscriber Number communication system of the present invention;
Fig. 2 is the schematic flow sheet according to the outgoing of embodiment of the present invention POTS phone;
Fig. 3 is by the schematic flow sheet of PSTN to POTS incoming telephone call according to the embodiment of the present invention;
Fig. 4 is by the schematic flow sheet of IMS to POTS incoming telephone call according to the embodiment of the present invention;
According to the embodiment of the present invention, Fig. 5 supports that Multi-Subscriber Number method intelligence finds the schematic flow sheet of SBC.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
As shown in Figure 1, the communication system of support Multi-Subscriber Number of the present invention, the domestic call user UE_A be in foreign country by hanging voice gateway equipment under family, realize by Internet Protocol telephone and communication network Telephone Assembly integral, same POTS phone use heterogeneous networks time be suitable for different operators distribute code number.This system uses original POTS phone by user, both phone can be dialed by original conventional telecommunication network, also dial international long-distance telephone by the Internet that rate are cheap, meet client and reduce the needs that call rate realize communication exchange, easy to use.
As shown in Figure 1, for the present invention, one is hung in the voice gateways of user side under family POTS phone, the two-way interface provided by these voice gateways, user UE_A can access overseas local PSTN network and Internet network (being indirectly linked in domestic IMS (IPMultimediaSubsystem, IP Multimedia System)) respectively.
As shown in Figure 1, access way one: user UE_A selects twisted-pair feeder by voice gateway equipment access POTS phone, user is registered to overseas local PSTN (PublicSwitchedTelephoneNetwork by this circuit, PSTN) telephone network, be stored on this voice gateway equipment by overseas local PSTN network allocation coding resource; Access way two: user UE_A selects ethernet line, by access waies such as WAN, ADSL by POTS phone accessing Internet network, this POTS phone can be registered to the IMS network of domestic all-IP by voice gateways subsequently, that is, due to the user's registration information stored in voice gateways, making the user UE_A be in foreign country have dual communications user identity, is the registered user of the IMS of home communications operator, is again the registered user of overseas local PSTN network.
In following embodiments of the invention, the number that the IMS of this user UE_A be in foreign country common carrier at home registers is as 139 ××××s, and the number in overseas local (for the U.S.) PSTN network registered is as 7193695915.
It should be noted that, in following various embodiments of the present invention, if user UE_A is as calling subscriber, its called number is only the number of domestic registration, no matter and whether called number is phone number or fixed line number, the user UE_A that can realize being in foreign country dials the effect of international long-distance telephone by the Internet that rate are cheap; If user UE_A is as called subscriber, be whether only the herd number of IMS network at home according to its calling number, no matter and whether calling number is phone number or fixed line number.
Therefore, this user UE_A also can enjoy the cheap communication effect of telephone expenses easy to use as domestic this locality dials phone in overseas.
embodiment of the method
For the service that domestic IMS network provides, first we need to solve SBC (SessionBorderController, Session Border Controller) intelligence pinpoint the problems, voice gateways VoiceGW is allowed to register according to the SBC that the situation search of roaming place is best and use business during roaming, avoid logging in all needs to get back to a certain fixing SBC and accepts service at every turn, affect service quality, improve cost of serving.Therefore, the general domain name of we configuration SBC in client (VoiceGW), such as SBC.ChinaMobile.Com, client is at the forward direction DNS (DomainNameSystem that initiates a session request, domain name system) Server initiation domain name inquiry request, DNSServer feeds back IP address corresponding to domain name, and the SBC that then client is corresponding to the IP address returned again sends Invite, as shown in Figure 5:
Step S502: client is initiated to the registration request of IMS network, sends request (SBC.ChinaMobile.Com) to dns server, the SBC address of request dispatching optimum;
It should be noted that, implication optimum in above-mentioned steps S502 mainly show the way by recently and network quality best.Such as a user logs in the U.S. and uses this business, but POTS phone is only recorded in the SBC address of China, so POTS phone must enter IP private network by just logging in SBC behind common the Internet to China, but the quality of general internet can not ensure, therefore converse or use the quality of other business also can be poor.If after achieving optimal scheme SBC address, can notify that the POTS phone logged in the U.S. logs in the SBC of the U.S., on network, just can use the service that high-quality IP private network provides so always.
Step S504:DNS server inquires about SBC server list according to domain name SBC.ChinaMobile.Com, and the SBC address of response (Response) optimum is registered to VoiceGW;
Step S506:VoiceGW, according to the IP address of the registration SBC obtained, is initiated to the registration process of SBC, the follow-up initiation completing Invite session request.
The communication means of the support Multi-Subscriber Number of the present embodiment, sends session request according to the SBC that the concrete condition search of roaming place is best, improves the session service quality of client, also reduce the work load of system.
According to the embodiment of the present invention, provide a kind of communication means supporting Multi-Subscriber Number, Fig. 2 is the schematic flow sheet according to the outgoing of embodiment of the present invention POTS phone, and as shown in Figure 2, the present embodiment comprises:
Step S102: in overseas, user UE_A pick up the POTS phone request of making a call in family, extract the call number of called UE _ B;
Step S104: this calling, through voice gateways VoiceGW, is carried out the selection of speech channel, and carried out respective handling according to the called number information that user dials by the route access module in voice gateways;
Step S106: if the called number that dials of user UE_A similar be 0086139 ××××, national code due to this number is designated the IMS network number of only one China, therefore the number of the IMS network being registered in China is enabled in above-mentioned support Multi-Subscriber Number communication system as calling number, first access point SBC (SessionBorderController is nearby routed to via Internet network, Session Border Controller) network element, and access domestic IMS core net, initiate Invite call request by domestic IMS core network control system to called subscriber UE_B;
Step S108: if the called number that dials of user UE_A similar be 0017193695915 or 7193695915, national code mark due to this number is the overseas local number of this POTS phone registration of U.S.'s number or acquiescence, therefore enable above-mentioned support Multi-Subscriber Number communication system and be registered in overseas local number as calling number, initiate subsequent voice calls request;
Step S110: be suitable for overseas local telephone network system (as PSTN system) and initiate subsequent voice calls to called subscriber UE_B.
The communication means of the support Multi-Subscriber Number of the present embodiment, to send caller request in overseas user to the number of domestic or overseas this locality, a POTS phone is registered to overseas local communication system and domestic IMS system respectively, when user dials phone, suitable talking connection path is selected according to called number, facilitate user quick and cheap dial domestic and international phone, meet the communication needs of client.
According to the embodiment of the present invention, provide a kind of communication means supporting Multi-Subscriber Number, Fig. 3 is by the schematic flow sheet of PSTN to POTS incoming telephone call according to the embodiment of the present invention, in the present embodiment, the calling number registered at home in step S204 is as the non-registered number of IP Multimedia System, that is this calling number is not registered in IMS network at home.
As shown in Figure 3, the present embodiment comprises:
Step S202: the user UE_B of calling number uses communication terminal to the POTS phone request of making a call in the user UE_A family be in foreign country, and extracts called number;
Step S204: if the called number that dials of user UE_B similar be 0017193695915 or 7193695915, if calling number is domestic herd number, because called number is an overseas PSTN network number, above-mentioned calling is via existing PSTN route, the PSTN network of this called number registered place country is entered through international gateway, continuing then by overseas local PSTN Systematical control subsequent voice calls, finally this calling is routed to called POTS phone via voice gateways VoiceGW; If calling number is the PSTN number of called POTS phone registered place (namely overseas local), carries out signaling negotiation in the PSTN network that this calling is directly local in overseas, complete follow-up call;
The POTS phone ring of step S206: overseas subscriber UE_A is sounded, and completes follow-up signaling negotiation, sets up call.
It should be noted that, because the calling number registered at home in the present embodiment is not registered in IMS network, if therefore this calling number dials number 139 ×××× that this user UE_A be in foreign country registers in IMS network, due to the existing framework restriction of IMS network, this 139 ×××× number of IMS network None-identified, that is, above-mentioned domestic calling number cannot continue with the user UE_A be in foreign country when dialing 139 ×××× number.
The communication means of the support Multi-Subscriber Number of the present embodiment, caller request is sent by PSTN network to called POTS phone for the calling number in domestic or overseas this locality, completed the process that continues of calling by international or overseas local PSTN, meet the communication needs of client.
According to the embodiment of the present invention, provide a kind of communication means supporting Multi-Subscriber Number, Fig. 4 is by the schematic flow sheet of IMS to POTS incoming telephone call according to the embodiment of the present invention, in the present embodiment, the calling number registered at home is as the herd number of IP Multimedia System, that is, registered in this calling number IMS network at home.
As shown in Figure 4, the present embodiment is that IMS number or PSTN number are divided into two kinds of situations according to called number:
Situation one comprises:
Step S302: the user UE_B being in domestic calling number uses IMS terminal to the POTS phone request of making a call of the user UE_A be in foreign country, and extracts called number;
Step S304: if the called number that dials of UE_B similar be 0086139 ××××, domestic IMS network is according to called number log-on message, find that called subscriber UE_A uses an IMS registration number, initiate subsequent voice calls by this number attribution S-CSCF (i.e. business-CSCF), the POTS phone in overseas subscriber UE_A family is mail in this calling via Internet network;
POTS phone ring in step S306: user UE_A overseas family is sounded, and completes follow-up signaling negotiation, sets up call.
Situation two comprises:
Step S402: the user UE_B being in domestic calling number uses IMS terminal to the POTS phone request of making a call in overseas subscriber UE_A family, extracts called number;
Step S404: if the called number that dials of UE_B similar be 0017193695915 or 7193695915, because this called number is an overseas PSTN network number, then first need this calling to be routed on domestic PSTN network by IMS domain;
Step S406: then by domestic PSTN network control call routing through the PSTN network of international gateway to the POTS phone registered place in user's overseas subscriber UE_A family;
Step S408-S410: last by the follow-up calling to POTS phone of the PSTN network control of POTS phone registered place.
It should be noted that, because the calling number registered at home in the present embodiment is registered in IMS network, if therefore this calling number dials number 139 ×××× that this user UE_A be in foreign country registers in IMS network, this calling is by the POTS phone that is linked into by domestic IMS network and Internet in user UE_A family; If when this calling number dials the number 7193695915 that the user UE_A that is in foreign country in overseas local PSTN network registers, this calling will be walked existing normal international long-distance telephone flow process (being generally PSTN network) and continue.
The communication means of the support Multi-Subscriber Number of the present embodiment, to send caller request by IMS network to the POTS phone in overseas subscriber UE_A family in domestic calling number, be that IMS number or PSTN number are divided into two kinds of situations according to called number, completed the process that continues of calling by IMS domain or overseas local PSTN network, meet the communication needs of client.
device embodiment
According to the embodiment of the present invention, provide a kind of voice gateways supporting Multi-Subscriber Number.The present embodiment comprises:
Receive request module, for receiving the Client-initiated IP Multimedia System registration request being positioned at other country, according to registration request to domain name system server request dispatching optimal session boarder controller address;
Address accept module, for receiving the optimal session boarder controller address that domain name system server issues;
Registration request module, for initiating registration request according to optimal session boarder controller address to Session Border Controller;
Speech channel judge module, for receiving the Client-initiated call request being positioned at other country, judges the called number type of this calling according to call request;
Route access module, for continuing process to calling according to called number type:
If called number type is home country's number of user, then the IP Multimedia System calling through Internet and access described user home country is carried out the process that continues;
If called number type is the local number of user place other country, then the local communication network of calling access user place other country is carried out the process that continues.
Simultaneously:
Speech channel judge module, also for receiving the call request of the calling number initiation being positioned at user home country, judges the called number type of this calling according to call request;
Route access module, also for continuing process to calling according to called number type:
If called number type is the number that user registers at the IP Multimedia System of its home country, then calls through the IP Multimedia System of access user home country and the mode of Internet successively and continue;
If called number type is the local number of user place other country, then the mode calling through access international long-distance communication network is routed on the local communication network of user place other country;
Wherein, calling number is the herd number of described IP Multimedia System.
Simultaneously:
Speech channel judge module, also for receiving the call request of the calling number initiation being positioned at described user home country;
Route access module, if the local number for the called number of call request being also user place other country, then the mode calling through access international long-distance communication network is routed on the local communication network of user place other country;
Wherein, calling number is the non-registered number of described IP Multimedia System.
It should be noted that, in speech channel judge module, judge the called number type of calling according to the national code mark of called number.
The voice gateways of the support Multi-Subscriber Number of the present embodiment, to have the user of domestic IMS registration identity and overseas local communication network registration identity simultaneously, according to the different talk business demands of user, achieve this user when being in foreign country, no matter dial or answer domestic toll telephone, still dial or answer overseas local phone, the cheap phone of rate can be dialed easily, meet client and reduce the needs that call rate realize communication exchange.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. support a communication means for Multi-Subscriber Number, it is characterized in that, comprising:
1) voice gateways receive the Client-initiated IP Multimedia System registration request being positioned at other country, according to described registration request to domain name system server request dispatching optimal session boarder controller address;
2) domain name system server is according to the list of distribution requesting query Session Border Controller, and institute's voice gateway is handed down in the optimal session boarder controller address obtained;
3) institute's voice gateway initiates registration request according to described optimal session boarder controller address to Session Border Controller;
Also comprise:
4) institute's voice gateway received bit is in the Client-initiated call request of other country, judges the called number type of this calling according to described call request;
5) if described called number type is home country's number of described user, institute's voice gateway then calls through the IP Multimedia System that Internet accesses described user home country and carries out described the process that continues.
2. method according to claim 1, is characterized in that, also comprises:
6) if described called number type is the local number of user place other country, the local communication network of the described user place other country of described calling access is then carried out the process that continues by institute's voice gateway.
3. method according to claim 2, is characterized in that, also comprises:
7) call request initiated in the calling number of described user home country of institute's voice gateway received bit, judges the called number type of this calling according to described call request;
8) if described called number type is the number that described user registers at the IP Multimedia System of its home country, then call through described in and access the described IP Multimedia System of user home country successively and the mode of Internet continues;
9) if described called number type is the local number of described user place other country, then the mode calling through access international long-distance communication network described in is routed on the local communication network of described user place other country;
Wherein, described calling number is the herd number of described IP Multimedia System.
4. method according to claim 2, is characterized in that, also comprises:
10) call request initiated in the calling number of described user home country of institute's voice gateway received bit;
11) if the called number of described call request is the local number of described user place other country, then the mode calling through access international long-distance communication network described in is routed on the local communication network of described user place other country;
Wherein, described calling number is the non-registered number of described IP Multimedia System.
5. according to the method in claim 1-4 described in any one, it is characterized in that, in described step 4) in, the called number type of described calling is judged according to the national code mark of called number.
6. support voice gateways for Multi-Subscriber Number, it is characterized in that, comprising:
Receive request module, for receiving the Client-initiated IP Multimedia System registration request being positioned at other country, according to described registration request to domain name system server request dispatching optimal session boarder controller address;
Address accept module, for receiving the optimal session boarder controller address that domain name system server issues;
Registration request module, for initiating registration request according to described optimal session boarder controller address to Session Border Controller;
Also comprise:
Speech channel judge module, for receiving the Client-initiated call request being positioned at other country, judges the called number type of this calling according to described call request;
Route access module, for continuing process to described calling according to described called number type:
If described called number type is home country's number of described user, then calls through the IP Multimedia System that Internet accesses described user home country and carry out described the process that continues;
If described called number type is the local number of user place other country, then the local communication network of the described user place other country of described calling access is carried out the process that continues.
7. voice gateways according to claim 6, is characterized in that, also comprise:
Speech channel judge module, also for receiving the call request of the calling number initiation being positioned at described user home country, judges the called number type of this calling according to described call request;
Route access module, also for continuing process to described calling according to described called number type:
If described called number type is the number that described user registers at the IP Multimedia System of its home country, then calls through described in and access the described IP Multimedia System of user home country successively and the mode of Internet continues;
If described called number type is the local number of described user place other country, then the mode calling through access international long-distance communication network described in is routed on the local communication network of described user place other country;
Wherein, described calling number is the herd number of described IP Multimedia System.
8. voice gateways according to claim 6, is characterized in that, also comprise:
Speech channel judge module, also for receiving the call request of the calling number initiation being positioned at described user home country;
Route access module, if the local number for the called number of described call request being also described user place other country, then the mode calling through access international long-distance communication network described in is routed on the local communication network of described user place other country;
Wherein, described calling number is the non-registered number of described IP Multimedia System.
9. according to the voice gateways in claim 6-8 described in any one, it is characterized in that, in described speech channel judge module, judge the called number type of described calling according to the national code mark of called number.
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| CN201110353416.8A CN103107975B (en) | 2011-11-09 | 2011-11-09 | Support communication means and the voice gateways of Multi-Subscriber Number |
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| CN104917717B (en) * | 2014-03-10 | 2018-09-07 | 中国移动通信集团北京有限公司 | A kind of method of calling, equipment and system |
| CN105657202B (en) | 2016-02-05 | 2018-12-25 | 郑歆明 | A kind of communication means based on voice gateways |
| CN105592239A (en) * | 2016-02-05 | 2016-05-18 | 郑歆明 | Voice gateway |
| CN106941669B (en) * | 2017-02-28 | 2020-01-31 | 华为技术有限公司 | Wireless communication method and P-CSCF (proxy Call Session control function) equipment |
| CN110351701B (en) * | 2019-08-09 | 2022-01-25 | 中国联合网络通信集团有限公司 | Communication method, device and storage medium for international roaming voice service |
| CN115396398B (en) * | 2022-07-29 | 2024-04-26 | 中国电信股份有限公司 | Derived domain name access method, system, device, storage medium and program product |
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| CN101114926A (en) * | 2006-07-28 | 2008-01-30 | 中兴通讯股份有限公司 | Method for fixed user access to IP multimedia subsystem |
| CN101296504A (en) * | 2007-04-26 | 2008-10-29 | 华为技术有限公司 | Method, system and device for implementing IP multimedia subsystem service in roaming network |
| CN101217798A (en) * | 2008-01-09 | 2008-07-09 | 中兴通讯股份有限公司 | A local transferring control method in IP multimedia subsystem |
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