CN104158989A - Fixed telephone roaming system and method - Google Patents
Fixed telephone roaming system and method Download PDFInfo
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Abstract
The invention discloses a fixed telephone roaming system and a method. The fixed telephone roaming system comprises a local fixed telephone, a PSTN system, an IMS system and a roaming fixed telephone. The fixed telephone roaming method comprises the following steps: s10, the roaming fixed telephone connects with IMS system and registers in IMS system, and establishes the corresponding relation between the roaming fixed telephone and the number in different place; s20, when the local fixed telephone calls the roaming fixed telephone, the local fixed telephone is connected with the IMS system through the PSTN system, and the corresponding relation between the roaming fixed telephone and the foreign number on the IMS system is inquired; and S30, calling the remote number through the PSTN system according to the corresponding relation between the roaming fixed telephone and the remote number. The invention realizes the function of fixed telephone number portability roaming by the intercommunication of the IMS system and the existing PSTN network function, and adopts the technical proposal of transmitting signaling messages by the IMS system and transmitting voice media streams by the PSTN system, thereby ensuring the quality of voice call. The invention can be widely applied to various telephone systems.
Description
Technical field
The present invention relates to field of telephone communication, relate in particular to a kind of landline telephone roaming system, the invention still further relates to a kind of landline telephone loaming method.
Background technology
IMS:IP Multimedia Subsystem, IP Multimedia System.
PSTN:Public Switched Telephone Network, PSTN.
FXS: phone interface is exchangeed subscriber in periphery.
FXO: Foreign Exchange Office interface.
E1: a kind of pulse modulation coding standard.
VoIP: the i.e. networking telephone, Voice over Internet Protocol, after overcompression and package, carries out the transmission of speech sound signal, popular namely Internet Protocol telephone or IP phone by the sound signal of simulation in IP network with the form of data packet.
Fixed telephone network is divided different geographic areas in the whole country, the corresponding unique fixing area code in each geographic area; The equipment of whole network composition mainly contains stored-program control exchange, media gateway, storage of subscriber data equipment, service server, counting equipment and telephone terminal etc., and the key equipment that wherein relates to audio call is stored-program control exchange.Stored-program control exchange is distributed in zones of different and is responsible for the access to telephone terminal in one's respective area, is connected to each other and communicates by letter between each stored-program control exchange by E1 relaying.
Fixed-line phone service is mainly provided by Chinese Telecommunication Operator at present, and national fixed telephone number unified planning distributes, and number format is defined as: trunk code+local number.All fixed telephone numbers can only use in one's respective area, do not support the number of taking roaming function, as dialed in Beijing, receive calls taking 010 number as trunk code, and can not the roaming of the number of taking at home and abroad as phone number.
Summary of the invention
In order to solve the problems of the technologies described above, the object of this invention is to provide a kind of landline telephone system that the number of taking is roamed, simple in structure and speech quality is good that realizes.
In order to solve the problems of the technologies described above, another object of the present invention is to provide a kind of number of taking roaming and good landline telephone loaming method of speech quality realized.
The technical solution adopted in the present invention is:
A kind of landline telephone roaming system, it comprises local landline telephone, PSTN system, IMS system and roaming landline telephone.Described PSTN system comprises: local program control switch, is connected with local landline telephone; Strange land stored-program control exchange, is connected with local program control switch.Described IMS system comprises: local Tandem Gateway, for the connecting interface of IMS system and local program control switch is provided; Soft switch, is connected with local Tandem Gateway, strange land Tandem Gateway and service server respectively, for route switching; Service server, is connected with soft switch, for storage and speech business processing capacity are provided; Strange land Tandem Gateway, is connected with strange land stored-program control exchange and roaming landline telephone respectively.
Preferably, described roaming landline telephone is to be connected by IAD with strange land Tandem Gateway.
Preferably, described IAD comprises FXS interface and IP interface, and described IAD is connected, is connected with strange land Tandem Gateway by IP interface with roaming landline telephone by FXS interface.
Preferably, described local Tandem Gateway is connected with the FXS interface of local program control switch by FXO interface.
Preferably, described soft switch is connected with local Tandem Gateway, strange land Tandem Gateway and service server respectively by IP network.
Preferably, described local program control switch is connected with strange land stored-program control exchange by E1 network.
A kind of landline telephone loaming method, it comprises step: S10, roaming landline telephone connects IMS system and in IMS system registry, sets up the corresponding relation of roaming landline telephone and strange land number; S20, when local landline telephone is called out roaming landline telephone, connects IMS system by PSTN system, roams the corresponding relation of landline telephone and strange land number in inquiry IMS system; S30, according to the corresponding relation of roaming landline telephone and strange land number, by PSTN system calling strange land number; S40, according to the corresponding relation of roaming landline telephone and strange land number, by IMS system, is transferred to roaming landline telephone by PSTN system to strange land number call request.
Preferably, described step S10 comprises sub-step: S11, and roaming landline telephone connects IMS system in IMS system registry; S12, the strange land Tandem Gateway of IMS system is received after the registration message of roaming landline telephone, distribute a strange land number to this roaming landline telephone, and record the corresponding relation of roaming landline telephone and strange land number, and this correspondence relationship information is dealt into the soft switch of IMS system; S13, soft switch is reported to the correspondence relationship information of roaming landline telephone and strange land number the service server of IMS system, and service server is preserved this information.
Preferably, described step S20 comprises sub-step: S21, and local landline telephone is initiated the calling to roaming landline telephone to the local program control switch in PSTN system; S22, local program control switch makes a call to the local Tandem Gateway in IMS system by FXS interface; S23, local Tandem Gateway is received after calling, initiates IP call out by soft switch to service server; S24, the correspondence relationship information of inquiry roaming landline telephone and strange land number after service server receives and calls out.
Preferably, described step S30 comprises sub-step: S31, and the service server in IMS system strange land number corresponding to roaming landline telephone call number changes into, returns to local program control switch by soft switch and local Tandem Gateway; S32, local program control switch is initiated the calling to strange land number, by E1 calling network strange land stored-program control exchange; S33, strange land stored-program control exchange is called out corresponding strange land number;
Preferably, described step S40 comprises sub-step: S41, and strange land Tandem Gateway is transferred in the call request of strange land number by strange land stored-program control exchange; S42, strange land Tandem Gateway is received after calling again according to the roaming landline telephone of preserving before this locality and the corresponding relation of strange land number, changes back roaming fixed telephone number called number, makes a call to roaming landline telephone.
The invention has the beneficial effects as follows:
A kind of landline telephone roaming system of the present invention is by the function of IMS system and the existing PSTN network function interworking implementation landline telephone number of taking roaming, and adopt by IMS system signaling message transmission, by the technical scheme of PSTN system transferring voice Media Stream, ensure the quality of voice call, can meet the particular demands of the upper landline telephone number of the taking roaming of some mobile platform (automobile, steamer, aircraft etc.), system configuration is simple, has good economic and social benefit.
Another beneficial effect of the present invention is:
A kind of landline telephone loaming method of the present invention is by the function of IMS system and the existing PSTN network function interworking implementation landline telephone number of taking roaming, and adopt by IMS system signaling message transmission, by the technical scheme of PSTN system transferring voice Media Stream, ensure the quality of voice call, can meet the particular demands of the upper landline telephone number of the taking roaming of some mobile platform (automobile, steamer, aircraft etc.), system configuration is simple, has good economic and social benefit.
The present invention can be widely used in various telephone systems.
Brief description of the drawings
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
Fig. 1 is the structural representation of a kind of embodiment of landline telephone roaming system of the present invention;
Fig. 2 is structural representation of the present invention and call flow diagram.
Embodiment
It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.
As depicted in figs. 1 and 2, a kind of landline telephone roaming system, it comprises local landline telephone, PSTN system, IMS system and roaming landline telephone.
Described PSTN system comprises: local program control switch, is connected with local landline telephone; Strange land stored-program control exchange, is connected with local program control switch.
Described IMS system comprises:
Local Tandem Gateway, for providing the connecting interface of IMS system and local program control switch.
Soft switch, is connected with local Tandem Gateway, strange land Tandem Gateway and service server respectively, for route switching; Soft switch hardware can be made up of a computer, and IP interface (Ethernet interface) is externally provided, and disposes on computers soft switch software.Soft switch mainly realizes terminal use's registration, the functions such as route switching.Soft switch is generally deployed in IMS system group network center.
Service server, is connected with soft switch, for storage and speech business processing capacity are provided; Service server hardware can be made up of a computer, and IP interface (Ethernet interface) is externally provided, and disposes on computers business service software.Service server is mainly realized the Business Processing that voice are relevant.Service server is generally deployed in IMS system group network center.
Strange land Tandem Gateway, is connected with strange land stored-program control exchange and roaming landline telephone respectively.
Local Tandem Gateway and strange land Tandem Gateway hardware mainly form by loop plate, FXO interface and Ethernet interface are externally provided, FXO interface connects the stored-program control exchange of PSTN system, and Ethernet interface connects soft switch by IP network, at the corresponding software of loop plate deploy.Local Tandem Gateway and strange land Tandem Gateway are mainly realized the stored-program control exchange interconnection of IMS system and PSTN system, and PSTN system calling is to the translation function of voip call signaling and Media Stream.Local Tandem Gateway and strange land Tandem Gateway can have multiple, are deployed in all parts of the country, and local and remote side is comparatively speaking, and the on-site Tandem Gateway of calling party is called local Tandem Gateway, and the on-site Tandem Gateway of callee is called strange land Tandem Gateway.
Technical solution of the present invention does not need to revise any configuration of existing PSTN system, just increases an IMS system and PSTN system and interconnects to realize landline telephone roaming by existing interface.
Preferably, described roaming landline telephone is to be connected by IAD with strange land Tandem Gateway.Described IAD comprises FXS interface and IP interface, and described IAD is connected, is connected with strange land Tandem Gateway by IP interface with roaming landline telephone by FXS interface.IAD hardware is mainly made up of phone plate, and FXS interface and Ethernet interface are externally provided, and FXS interface connects roaming landline telephone, and Ethernet interface is connected to strange land Tandem Gateway by netting twine/optical fiber, at the corresponding software of phone plate deploy.IAD is deployed in called location, the main access that realizes roaming landline telephone, and PSTN system calling is to the translation function of VOIP call signaling and Media Stream.
Preferably, described local Tandem Gateway is connected with the FXS interface of local program control switch by FXO interface.
Preferably, described soft switch is connected with local Tandem Gateway, strange land Tandem Gateway and service server respectively by IP network.
Preferably, described local program control switch is connected with strange land stored-program control exchange by E1 network.
In the present invention, PSTN system does not need to do any change, only the telephone wire that was originally connected and fixed phone need be changed into now and connects local Tandem Gateway; Each equipment of IMS internal system is interconnected by IP network, and the unified PXO interface by Tandem Gateway access PSTN system, to roaming landline telephone by the Ethernet interface access of Tandem Gateway; Realize the signaling transfer point of fixed telephone terminal and Tandem Gateway by IAD.
A kind of landline telephone roaming system of the present invention is by the function of IMS system and the existing PSTN network function interworking implementation landline telephone number of taking roaming, and adopt by IMS system signaling message transmission, by the technical scheme of PSTN system transferring voice Media Stream, ensure the quality of voice call, can meet the particular demands of the upper landline telephone number of the taking roaming of some mobile platform (automobile, steamer, aircraft etc.), system configuration is simple, has good economic and social benefit.
A kind of landline telephone loaming method, it comprises step: S10, roaming landline telephone connects IMS system and in IMS system registry, sets up the corresponding relation of roaming landline telephone and strange land number; S20, when local landline telephone is called out roaming landline telephone, connects IMS system by PSTN system, roams the corresponding relation of landline telephone and strange land number in inquiry IMS system; S30, according to the corresponding relation of roaming landline telephone and strange land number, by PSTN system calling strange land number; S40, according to the corresponding relation of roaming landline telephone and strange land number, by IMS system, is transferred to roaming landline telephone by PSTN system to strange land number call request.
Preferably, described step S10 comprises sub-step: S11, and roaming landline telephone connects IMS system in IMS system registry; S12, the strange land Tandem Gateway of IMS system is received after the registration message of roaming landline telephone, distribute a strange land number to this roaming landline telephone, and record the corresponding relation of roaming landline telephone and strange land number, and this correspondence relationship information is dealt into the soft switch of IMS system; S13, soft switch is reported to the correspondence relationship information of roaming landline telephone and strange land number the service server of IMS system, and service server is preserved this information.
Preferably, described step S20 comprises sub-step: S21, and local landline telephone is initiated the calling to roaming landline telephone to the local program control switch in PSTN system; S22, local program control switch makes a call to the local Tandem Gateway in IMS system by FXS interface; S23, local Tandem Gateway is received after calling, initiates IP call out by soft switch to service server; S24, the correspondence relationship information of inquiry roaming landline telephone and strange land number after service server receives and calls out.
Preferably, described step S30 comprises sub-step: S31, and the service server in IMS system strange land number corresponding to roaming landline telephone call number changes into, returns to local program control switch by soft switch and local Tandem Gateway; S32, local program control switch is initiated the calling to strange land number, by E1 calling network strange land stored-program control exchange; S33, strange land stored-program control exchange is called out corresponding strange land number;
Preferably, described step S40 comprises sub-step: S41, and strange land Tandem Gateway is transferred in the call request of strange land number by strange land stored-program control exchange; S42, strange land Tandem Gateway is received after calling again according to the roaming landline telephone of preserving before this locality and the corresponding relation of strange land number, changes back roaming fixed telephone number called number, makes a call to roaming landline telephone.
Move to Shenzhen roaming call below taking landline telephone from Beijing as example, workflow of the present invention is described in detail in detail.(local landline telephone: 010-80005001, roaming landline telephone: 010-80005002).
Step numbers in following step numbers corresponding diagram 2.Wherein, the corresponding register flow path in dotted arrow path, the corresponding call flow in solid arrow path.
Register flow path:
A, IAD agency's roaming landline telephone (010-80005002), to Shenzhen Tandem Gateway (strange land Tandem Gateway) registration, carry the number information of roaming fixed telephone terminal in registration message;
B, Shenzhen Tandem Gateway (strange land Tandem Gateway) are received after the registration message of roaming landline telephone, distribute a local interim strange land number (0755-70004001) to this roaming landline telephone, and record the corresponding relation of roaming landline telephone (010-80005002) and strange land number (0755-70004001), and this correspondence relationship information is dealt into the soft switch of IMS system by registration message;
C, soft switch are reported to service server roaming landline telephone (010-80005002) and the correspondence relationship information of strange land number (0755-70004001), and service server is preserved this information in this locality.
Call flow explanation:
1, Beijing landline telephone (local landline telephone 010-80005001) is dialed the number 010-80005002 of roaming landline telephone;
2, the stored-program control exchange (local program control switch) of Beijing landline telephone ownership detects, collects after called number 010-80005002, or initiates ring by corresponding FXS interface to the FXO interface of the Tandem Gateway (local Tandem Gateway) that is deployed in Beijing Area;
3, the Tandem Gateway of Beijing Area (local Tandem Gateway) is received after the ALERTING message of calling out 010-80005002, judge this number not at this facility registration, turn to IMS system soft switch initiate IP call out, and called number fill out or 010-80005002;
4, soft switch is triggered to service server by calling after receiving calling;
5, service server receives that called number is the calling of 010-80005002, and be 0755-70004001 at local search to number corresponding to 010-80005002, the called number of this calling changed into the backward soft switch of 0755-70004001 and again make a call;
6, soft switch forwards calling to the Tandem Gateway (local Tandem Gateway) of Beijing Area;
7, the calling that the Tandem Gateway of Beijing Area is 0755-70004001 by called number forwards PSTN system to, the local program control switch of PSTN system is analyzed called number 0755-70004001, after completing, analysis will call out the stored-program control exchange (strange land stored-program control exchange) of exhaling to Shenzhen by E1 relaying, called number is to the FXS port initiation ring of corresponding 0755-70004001 by analysis again for the stored-program control exchange (strange land stored-program control exchange) in Shenzhen, and the corresponding fxo port of Tandem Gateway (strange land Tandem Gateway) that is deployed in Shenzhen is received bell signal;
8, Shenzhen Tandem Gateway (strange land Tandem Gateway) is received after the called bell signal for 0755-70004001, again according to the 0755-70004001 preserving before this locality and the corresponding relation of 010-80005002, IP address information while previously registration in conjunction with mobile platform again, initiate voip call to mobile platform, and change back 010-80005002 called number, IAD receives that calling out backward roaming fixed telephone terminal initiates ring, follow-up called off-hook calling and called normal talking.
The function that has realized the landline telephone number of taking roaming by above-mentioned flow process, the media stream path of calling is: local landline telephone-Beijing stored-program control exchange (local program control switch)-Beijing Tandem Gateway (local Tandem Gateway)-Beijing stored-program control exchange (local program control switch)-Shenzhen stored-program control exchange (strange land stored-program control exchange)-Shenzhen Tandem Gateway (strange land Tandem Gateway)-IAD-roaming fixed telephone.
A kind of landline telephone loaming method of the present invention is by the function of IMS system and the existing PSTN network function interworking implementation landline telephone number of taking roaming, and adopt by IMS system signaling message transmission, by the technical scheme of PSTN system transferring voice Media Stream, ensure the quality of voice call, can meet the particular demands of the upper landline telephone number of the taking roaming of some mobile platform (automobile, steamer, aircraft etc.), system configuration is simple, has good economic and social benefit.The present invention can be widely used in various telephone systems.
More than that better enforcement of the present invention is illustrated, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement under the prerequisite without prejudice to spirit of the present invention, and the distortion that these are equal to or replacement are all included in the application's claim limited range.
Claims (11)
1. a landline telephone roaming system, is characterized in that, it comprises local landline telephone, PSTN system, IMS system and roaming landline telephone;
Described PSTN system comprises:
Local program control switch, is connected with local landline telephone;
Strange land stored-program control exchange, is connected with local program control switch;
Described IMS system comprises:
Local Tandem Gateway, for providing the connecting interface of IMS system and local program control switch;
Soft switch, is connected with local Tandem Gateway, strange land Tandem Gateway and service server respectively, for route switching;
Service server, is connected with soft switch, for storage and speech business processing capacity are provided;
Strange land Tandem Gateway, is connected with strange land stored-program control exchange and roaming landline telephone respectively.
2. a kind of landline telephone roaming system according to claim 1, is characterized in that: described roaming landline telephone is to be connected by IAD with strange land Tandem Gateway.
3. a kind of landline telephone roaming system according to claim 2, is characterized in that: described IAD comprises FXS interface and IP interface, and described IAD is connected, is connected with strange land Tandem Gateway by IP interface with roaming landline telephone by FXS interface.
4. a kind of landline telephone roaming system according to claim 1, is characterized in that: described local Tandem Gateway is connected with the FXS interface of local program control switch by FXO interface.
5. a kind of landline telephone roaming system according to claim 1, is characterized in that: described soft switch is connected with local Tandem Gateway, strange land Tandem Gateway and service server respectively by IP network.
6. according to a kind of landline telephone roaming system described in claim 1 to 5 any one, it is characterized in that: described local program control switch is connected with strange land stored-program control exchange by E1 network.
7. a landline telephone loaming method, is characterized in that, it comprises step:
S10, roaming landline telephone connects IMS system and in IMS system registry, sets up the corresponding relation of roaming landline telephone and strange land number;
S20, when local landline telephone is called out roaming landline telephone, connects IMS system by PSTN system, roams the corresponding relation of landline telephone and strange land number in inquiry IMS system;
S30, according to the corresponding relation of roaming landline telephone and strange land number, by PSTN system calling strange land number;
S40, according to the corresponding relation of roaming landline telephone and strange land number, by IMS system, is transferred to roaming landline telephone by PSTN system to strange land number call request.
8. a kind of landline telephone loaming method according to claim 7, is characterized in that, described step S10 comprises sub-step:
S11, roaming landline telephone connects IMS system in IMS system registry;
S12, the strange land Tandem Gateway of IMS system is received after the registration message of roaming landline telephone, distribute a strange land number to this roaming landline telephone, and record the corresponding relation of roaming landline telephone and strange land number, and this correspondence relationship information is dealt into the soft switch of IMS system;
S13, soft switch is reported to the correspondence relationship information of roaming landline telephone and strange land number the service server of IMS system, and service server is preserved this information.
9. a kind of landline telephone loaming method according to claim 7, is characterized in that, described step S20 comprises sub-step:
S21, local landline telephone is initiated the calling to roaming landline telephone to the local program control switch in PSTN system;
S22, local program control switch makes a call to the local Tandem Gateway in IMS system by FXS interface;
S23, local Tandem Gateway is received after calling, initiates IP call out by soft switch to service server;
S24, the correspondence relationship information of inquiry roaming landline telephone and strange land number after service server receives and calls out.
10. a kind of landline telephone loaming method according to claim 7, is characterized in that, described step S30 comprises sub-step:
S31, the service server in IMS system strange land number corresponding to roaming landline telephone call number changes into, returns to local program control switch by soft switch and local Tandem Gateway;
S32, local program control switch is initiated the calling to strange land number, by E1 calling network strange land stored-program control exchange;
S33, strange land stored-program control exchange is called out corresponding strange land number.
11. a kind of landline telephone loaming methods according to claim 8, is characterized in that, described step S40 comprises sub-step:
S41, strange land Tandem Gateway is transferred in the call request of strange land number by strange land stored-program control exchange;
S42, strange land Tandem Gateway is received after calling again according to the roaming landline telephone of preserving before this locality and the corresponding relation of strange land number, changes back roaming fixed telephone number called number, makes a call to roaming landline telephone.
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| CN201410363436.7A CN104158989B (en) | 2014-07-28 | 2014-07-28 | Fixed telephone roaming system and method |
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| Publication number | Publication date |
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| CN104158989B (en) | 2016-08-24 |
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