CN104767708A - Communication method and device - Google Patents
Communication method and device Download PDFInfo
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- CN104767708A CN104767708A CN201410001310.5A CN201410001310A CN104767708A CN 104767708 A CN104767708 A CN 104767708A CN 201410001310 A CN201410001310 A CN 201410001310A CN 104767708 A CN104767708 A CN 104767708A
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Abstract
The invention discloses a communication method and device. The method comprises the following steps: receiving a call request of a calling terminal specific to a called terminal of an IMS (IP Multimedia Subsystem) network by an MGCF (Media Gateway Control Function) of a circuit switched domain (CS) network, adding the description information of the MGCF into the call request, and transmitting the call request added with the description information forwards to the IMS network; after a call response returned by the called terminal is received, forwarding the call response to the calling terminal; and after call connection is established between the calling terminal and the called terminal, forwarding media streams for interaction between the calling terminal and the called terminal. According to the method and device disclosed by the invention, a calling end office selects the entrance of a local MGCF into a called network by means of configuration of route data during communication between the CS network and the IMS network, so that media is prevented from detouring to a called area, and route detouring during communication between the CS network and the IMS network is reduced.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of communication means and device.
Background technology
IP multimedia system (IP Multimedia Subsystem, IMS) has obtained disposing more and more widely, simultaneously along with the deployment IMS of VoLTE becomes the core net of next generation communication especially.And a large amount of legacy circuit-switched domain (Circuit Switched Domain, the CS) network user also will deposit with IMS user over a period to come, therefore the intercommunication of CS and IMS will become a kind of very general communication scenes.
CS and IMS intercommunication comprises several scenes, wherein calls out and is initiated by CS, and again get back to the scene of CS after carrying out Business Processing via IMS, business realizing may comprise following situation:
The caller of CS network initiates a call to VoLTE user, carries out determining after the selection of territory to continue at CS through called IMS;
CS initiates a call to IMS user, this calling by forward to another CS user.
Wherein, the interworking point of IMS and CS network is MGCF entity (Media GatewayControl Function, MGCF).
The major defect of the routing mechanism of existing IMS and CS intercommunication is when selecting interworking point MGCF, the MGCF that CS enters IMS selects respectively with the MGCF being entered CS by IMS, so twice selection can cause routed path to increase, thus media route is caused to there is problem more roundabout.
Summary of the invention
The invention provides a kind of communication means and device, when method and apparatus provided by the present invention solves the intercommunication of CS and IMS in prior art, there is problem more roundabout in route.
First aspect, the invention provides a kind of communication means, comprising:
The call request that the terminal that the MGCF entity MGCF of circuit commutative field CS network receives ownership sends as calling terminal, the terminal called of described call request is IP multimedia system IMS user terminal, after described MGCF adds the descriptor of self to described call request, the forward pass call request message that with the addition of described descriptor is forwarded to IMS network;
After described MGCF receives the call answering that described terminal called returns for described forward pass call request, described call answering is transmitted to described calling terminal; Wherein, described call answering is that the Breakout Gateway Control Function entity B GCF that described terminal called belongs to forwards according to the described descriptor of carrying in described forward pass call request;
Described MGCF, after described calling terminal and described terminal called establish call connection, forwards described calling terminal and the mutual Media Stream of described terminal called; Wherein, described terminal called sends media according to the described descriptor of carrying in described call request and flows to described MGCF.
Optionally, after described MGCF adds the descriptor of self to described call request, the forward pass call request message that with the addition of described descriptor is forwarded to IMS network to comprise:
Described MGCF adds the descriptor of self header field of described call request to, and the forward pass call request message that with the addition of described descriptor is forwarded to IMS network.
Optionally, the address information of described MGCF is at least comprised in described descriptor.
Second aspect, the present invention also provides another communication means, and when calling terminal initiates the calling to the terminal called of IP multimedia system IMS network from circuit commutative field CS network, the method comprises:
After the Breakout Gateway Control Function entity B GCF of terminal called receives the call request of sending from the current on-site MGCF entity MGCF of described calling terminal, from described call request, obtain the address information of described MGCF; Call request is transmitted to terminal called, and after setting up communication link to make terminal called between calling terminal, the interaction data with calling terminal is issued described calling terminal by described MGCF by the address information according to the MGCF carried in call request;
After described BGCF receives the call that described terminal called returns, described responsive feedback is given described calling terminal by the MGCF determined by described address information, makes calling terminal and terminal called set up communication link.
Optionally, the address information obtaining described MGCF from described call request comprises:
Detect in the header field of described call request and whether be added with the first mark, from described first mark, obtain the address information of described MGCF.
The third aspect, method according to first aspect, the present invention also provides a kind of MGCF entity, and this MGCF entity comprises:
Receiver module, the call request that the terminal for receiving ownership sends as calling terminal, the terminal called of described call request is IP multimedia system IMS user terminal;
Information adds module, after adding the descriptor of self to described call request, the forward pass call request message that with the addition of described descriptor is forwarded to IMS network;
Forwarding module, after receiving call answering that described terminal called returns for described forward pass call request, is transmitted to described calling terminal by described call answering; Wherein, described call answering is that the Breakout Gateway Control Function entity B GCF that described terminal called belongs to forwards according to the described descriptor of carrying in described forward pass call request; And after described calling terminal and described terminal called establish call connection, forward described calling terminal and the mutual Media Stream of described terminal called; Wherein, described terminal called sends media according to the described descriptor of carrying in described call request and flows to described MGCF.
Optionally, information adds module also for the descriptor of self being added to the header field of described call request, and the forward pass call request message that with the addition of described descriptor is forwarded to IMS network.
Optionally, information adds the address information at least comprising described MGCF in the described descriptor of module interpolation.
Fourth aspect, method according to second aspect, the present invention also provides a kind of Breakout Gateway Control Function entity, when calling terminal initiates the calling to the terminal called of IP multimedia system IMS network from circuit commutative field CS network, the Breakout Gateway Control Function entity of terminal called ownership comprises:
Request receiving module, for receiving the call request of sending from the current on-site MGCF entity MGCF of described calling terminal;
Address information acquisition module, for obtaining the address information of described MGCF from described call request; Call request is transmitted to terminal called, and after setting up communication link to make terminal called between calling terminal, the interaction data with calling terminal is issued described calling terminal by described MGCF by the address information according to the MGCF carried in call request;
Feedback module, after receiving call that described terminal called returns, described responsive feedback is given described calling terminal by the MGCF determined by described address information, makes calling terminal and terminal called set up communication link.
Optionally, whether described address information acquisition module is also added with the first mark for detecting in the header field of described call request, obtains the address information of described MGCF from described first mark.One or two in technique scheme, at least has following technique effect:
Apply method and apparatus provided by the present invention, when CS network and IMS network intercommunication, by being configured route data, making originating switch select local MGCF to enter called network, avoiding media roundabout to dialed field; In call request, have recorded the address information of the MGCF forwarding this call request, so when calling enters CS by IMS again, then before can being selected by the address information of carrying in call request, the MGCF of record carries out route.By said method, calling can be made to make media through same MGCF in the process of IMS, and this MGCF and originating switch are contiguous, and then media route are approximately equal to directly arrive called end office by originating switch, realize media routing optimality.
Accompanying drawing explanation
The schematic flow sheet of a kind of communication means that Fig. 1 provides for the embodiment of the present invention one;
The schematic flow sheet of a kind of communication means that Fig. 2 provides for the embodiment of the present invention two;
The schematic flow sheet of a kind of communication means that Fig. 3 provides for the embodiment of the present invention three;
Fig. 4 is the structural representation of a kind of MGCF entity of the embodiment of the present invention;
Fig. 5 is the structural representation of a kind of Breakout Gateway Control Function entity of the embodiment of the present invention.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
A kind of communication means that the embodiment of the present invention provides, specifically comprises:
The call request that the terminal that the MGCF entity MGCF of circuit commutative field CS network receives ownership sends as calling terminal, the terminal called of described call request is IP multimedia system IMS user terminal, after described MGCF adds the descriptor of self to described call request, the forward pass call request message that with the addition of described descriptor is forwarded to IMS network;
After described MGCF receives the call answering that described terminal called returns for described forward pass call request, described call answering is transmitted to described calling terminal; Wherein, described call answering is that the Breakout Gateway Control Function entity B GCF that described terminal called belongs to forwards according to the described descriptor of carrying in described forward pass call request;
Described MGCF, after described calling terminal and described terminal called establish call connection, forwards described calling terminal and the mutual Media Stream of described terminal called; Wherein, described terminal called sends media according to the described descriptor of carrying in described call request and flows to described MGCF.
The method that the application embodiment of the present invention provides, when CS network and IMS network intercommunication, by being configured route data, making originating switch select local MGCF to enter called network, avoiding media roundabout to dialed field; In call request, have recorded the address information of the MGCF forwarding this call request, so when calling enters CS by IMS again, then before can being selected by the address information of carrying in call request, the MGCF of record carries out route.By said method, calling can be made to make media through same MGCF in the process of IMS, and this MGCF and originating switch are contiguous, and then media route are approximately equal to directly arrive called end office by originating switch, realize media routing optimality.
Embodiment one, as shown in Figure 1, the embodiment of the present invention provides a kind of communication means, is described in detail to the specific embodiment of the present invention below in conjunction with Figure of description:
Step 101, the call request that the terminal that the MGCF entity MGCF of circuit commutative field CS network receives ownership sends as calling terminal, the terminal called of described call request is IP multimedia system IMS user terminal, after described MGCF adds the descriptor of self to described call request, the forward pass call request message that with the addition of described descriptor is forwarded to IMS network;
Wherein, after described MGCF adds the descriptor of self to described call request, the forward pass call request message that with the addition of described descriptor is forwarded to IMS network to comprise:
Described MGCF adds the descriptor of self header field of described call request to, and the forward pass call request message that with the addition of described descriptor is forwarded to IMS network.
In order to the request-reply making to return CS network can again by the on-site MGCF of described caller, so at least comprise the address information of described MGCF in described descriptor.
The described call request of the application of reality be by session initiation protocol (Session Initiation Protocol, SIP) message send, then by the descriptor of self, the specific implementation of adding in call request can be MGCF:
MGCF adds a special SIP head territory when sending session initiation protocol (Session Initiation Protocol, SIP) message, and in described SIP head territory, record the address information of self.
Step 102, after described MGCF receives the call answering that described terminal called returns for described forward pass call request, is transmitted to described calling terminal by described call answering; Wherein, described call answering is that the Breakout Gateway Control Function entity B GCF that described terminal called belongs to forwards according to the described descriptor of carrying in described forward pass call request;
Step 103, described MGCF, after described calling terminal and described terminal called establish call connection, forwards described calling terminal and the mutual Media Stream of described terminal called; Wherein, described terminal called sends media according to the described descriptor of carrying in described call request and flows to described MGCF.
Embodiment two, as shown in Figure 2, the embodiment of the present invention also provides another communication means, and when calling terminal initiates the calling to the terminal called of IP multimedia system IMS network from circuit commutative field CS network, the method specifically comprises step:
Step 201, after the Breakout Gateway Control Function entity B GCF of terminal called receives the call request of sending from the current on-site MGCF entity MGCF of described calling terminal, obtains the address information of described MGCF from described call request; Call request is transmitted to terminal called, and after setting up communication link to make terminal called between calling terminal, the interaction data with calling terminal is issued described calling terminal by described MGCF by the address information according to the MGCF carried in call request;
Wherein, the address information obtaining described MGCF from described call request comprises:
Detect in the header field of described call request and whether be added with the first mark, from described first mark, obtain the address information of described MGCF.
Step 202, after described BGCF receives the call that described terminal called returns, described responsive feedback is given described calling terminal by the MGCF determined by described address information, makes calling terminal and terminal called set up communication link.
As shown in Figure 3, embodiment three, in conjunction with above-mentioned two kinds of communication meanss, in order to more know the method that detailed description the invention process provides, below in conjunction with system configuration the communication means that the embodiment of the present invention provides is described in further detail, when calling terminal initiates the calling to the terminal called of IP multimedia system IMS network from circuit commutative field CS network, specifically comprise:
Step 301, the call request that described calling terminal is initiated routes to default with the MGCF entity MGCF of originating switch in same districts and cities by the circuit domain switch that calling terminal is corresponding;
Step 302, described call request is forwarded to the Breakout Gateway Control Function entity B GCF of described terminal called ownership place by described MGCF, and in described call request, add the address information of self;
Step 303, described call request is forwarded to described terminal called by described BGCF;
Step 304, described MGCF receives the request-reply that terminal called sends according to the address information of carrying in described call request, and described call answering is forwarded to calling terminal, makes terminal called set up communication link between calling terminal;
Step 305, calling terminal and terminal called forward interactive media data flow by described MGCF.
Embodiment four, as shown in Figure 4, the method embodiment of the present invention according to embodiment also provides a kind of MGCF entity, and this MGCF entity comprises:
Receiver module 401, the call request that the terminal for receiving ownership sends as calling terminal, the terminal called of described call request is IP multimedia system IMS user terminal;
Information adds module 402, after adding the descriptor of self to described call request, the forward pass call request message that with the addition of described descriptor is forwarded to IMS network;
Forwarding module 403, after receiving call answering that described terminal called returns for described forward pass call request, is transmitted to described calling terminal by described call answering; Wherein, described call answering is that the Breakout Gateway Control Function entity B GCF that described terminal called belongs to forwards according to the described descriptor of carrying in described forward pass call request; And after described calling terminal and described terminal called establish call connection, forward described calling terminal and the mutual Media Stream of described terminal called; Wherein, described terminal called sends media according to the described descriptor of carrying in described call request and flows to described MGCF.
Wherein, described information adds module 402 also for the descriptor of self being added to the header field of described call request, and the forward pass call request message that with the addition of described descriptor is forwarded to IMS network.
In addition, in order to make the request-reply returning CS network again by the on-site MGCF of described caller, can at least comprise the address information of described MGCF in the described descriptor that described information interpolation module 402 is added.
Embodiment five, as shown in Figure 5, a kind of Breakout Gateway Control Function entity is also provided according to the method embodiment of the present invention that embodiment two provides, when calling terminal initiates the calling to the terminal called of IP multimedia system IMS network from circuit commutative field CS network, the Breakout Gateway Control Function entity of terminal called ownership comprises:
Request receiving module 501, for receiving the call request of sending from the current on-site MGCF entity MGCF of described calling terminal;
Address information acquisition module 502, for obtaining the address information of described MGCF from described call request; Call request is transmitted to terminal called, and after setting up communication link to make terminal called between calling terminal, the interaction data with calling terminal is issued described calling terminal by described MGCF by the address information according to the MGCF carried in call request;
Wherein, whether address information acquisition module 502 described in this is also added with the first mark for detecting in the header field of described call request, obtains the address information of described MGCF from described first mark.
Feedback module 503, after receiving call that described terminal called returns, described responsive feedback is given described calling terminal by the MGCF determined by described address information, makes calling terminal and terminal called set up communication link.
Above-mentioned one or more technical scheme in the embodiment of the present application, at least has following technique effect:
The method and apparatus that the application embodiment of the present invention provides, when CS network and IMS network intercommunication, by being configured route data, making originating switch select local MGCF to enter called network, avoiding media roundabout to dialed field;
In addition, have recorded the address information of the MGCF forwarding this call request in call request, so when calling enters CS by IMS again, then before can being selected by the address information of carrying in call request, the MGCF of record carries out route.By said method, calling can be made to make media through same MGCF in the process of IMS, and this MGCF and originating switch are contiguous, and then media route are approximately equal to directly arrive called end office by originating switch, realize media routing optimality.
Method of the present invention is not limited to the embodiment described in embodiment, and those skilled in the art's technical scheme according to the present invention draws and other execution mode belongs to technological innovation scope of the present invention equally.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a communication means, is characterized in that, comprising:
The call request that the terminal that the MGCF entity MGCF of circuit commutative field CS network receives ownership sends as calling terminal, the terminal called of described call request is IP multimedia system IMS user terminal, after described MGCF adds the descriptor of self to described call request, the forward pass call request message that with the addition of described descriptor is forwarded to IMS network;
After described MGCF receives the call answering that described terminal called returns for described forward pass call request, described call answering is transmitted to described calling terminal; Wherein, described call answering is that the Breakout Gateway Control Function entity B GCF that described terminal called belongs to forwards according to the described descriptor of carrying in described forward pass call request;
Described MGCF, after described calling terminal and described terminal called establish call connection, forwards described calling terminal and the mutual Media Stream of described terminal called; Wherein, described terminal called sends media according to the described descriptor of carrying in described call request and flows to described MGCF.
2. the method for claim 1, is characterized in that, after described MGCF adds the descriptor of self to described call request, the forward pass call request message that with the addition of described descriptor is forwarded to IMS network and comprises:
Described MGCF adds the descriptor of self header field of described call request to, and the forward pass call request message that with the addition of described descriptor is forwarded to IMS network.
3. the method for claim 1, is characterized in that, at least comprises the address information of described MGCF in described descriptor.
4. a communication means, is characterized in that, when calling terminal initiates the calling to the terminal called of IP multimedia system IMS network from circuit commutative field CS network, the method comprises:
After the Breakout Gateway Control Function entity B GCF of terminal called receives the call request of sending from the current on-site MGCF entity MGCF of described calling terminal, from described call request, obtain the address information of described MGCF; Call request is transmitted to terminal called, and after setting up communication link to make terminal called between calling terminal, the interaction data with calling terminal is issued described calling terminal by described MGCF by the address information according to the MGCF carried in call request;
After described BGCF receives the call that described terminal called returns, described responsive feedback is given described calling terminal by the MGCF determined by described address information, makes calling terminal and terminal called set up communication link.
5. method as claimed in claim 4, it is characterized in that, the address information obtaining described MGCF from described call request comprises:
Detect in the header field of described call request and whether be added with the first mark, from described first mark, obtain the address information of described MGCF.
6. a MGCF entity, is characterized in that, this MGCF entity comprises:
Receiver module, the call request that the terminal for receiving ownership sends as calling terminal, the terminal called of described call request is IP multimedia system IMS user terminal;
Information adds module, after adding the descriptor of self to described call request, the forward pass call request message that with the addition of described descriptor is forwarded to IMS network;
Forwarding module, after receiving call answering that described terminal called returns for described forward pass call request, is transmitted to described calling terminal by described call answering; Wherein, described call answering is that the Breakout Gateway Control Function entity B GCF that described terminal called belongs to forwards according to the described descriptor of carrying in described forward pass call request; And after described calling terminal and described terminal called establish call connection, forward described calling terminal and the mutual Media Stream of described terminal called; Wherein, described terminal called sends media according to the described descriptor of carrying in described call request and flows to described MGCF.
7. MGCF entity as claimed in claim 6, it is characterized in that, information adds module also for the descriptor of self being added to the header field of described call request, and the forward pass call request message that with the addition of described descriptor is forwarded to IMS network.
8. MGCF entity as claimed in claim 6, is characterized in that, information adds the address information at least comprising described MGCF in the described descriptor of module interpolation.
9. a Breakout Gateway Control Function entity, is characterized in that, when calling terminal initiates the calling to the terminal called of IP multimedia system IMS network from circuit commutative field CS network, the Breakout Gateway Control Function entity of terminal called ownership comprises:
Request receiving module, for receiving the call request of sending from the current on-site MGCF entity MGCF of described calling terminal;
Address information acquisition module, for obtaining the address information of described MGCF from described call request; Call request is transmitted to terminal called, and after setting up communication link to make terminal called between calling terminal, the interaction data with calling terminal is issued described calling terminal by described MGCF by the address information according to the MGCF carried in call request;
Feedback module, after receiving call that described terminal called returns, described responsive feedback is given described calling terminal by the MGCF determined by described address information, makes calling terminal and terminal called set up communication link.
10. Breakout Gateway Control Function entity as claimed in claim 9, it is characterized in that, whether described address information acquisition module is also added with the first mark for detecting in the header field of described call request, obtains the address information of described MGCF from described first mark.
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| CN104767708B (en) | 2018-11-02 |
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