CN1553668A - Method for inter-communication between virtual media gates - Google Patents
Method for inter-communication between virtual media gates Download PDFInfo
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- CN1553668A CN1553668A CNA031363717A CN03136371A CN1553668A CN 1553668 A CN1553668 A CN 1553668A CN A031363717 A CNA031363717 A CN A031363717A CN 03136371 A CN03136371 A CN 03136371A CN 1553668 A CN1553668 A CN 1553668A
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Abstract
This invention is relative to a method for the interconnection among the Virtual Media Gateway (VMGW), and implementing the interconnection among the VMGW in the same physical media gateway (MGW). It includes following steps: configures inner carrying resources between the MGW and VMGW; the Media Gateway Controller (MGC) takes the above configuring information; MGW decides if making the operation to the inner terminal, if deciding to add a inner terminal, then further decides if its company's terminal is existing, if yes, then makes these two inner terminal context incident and combined into one context. As retransferring the inner carrying, only message the combined context is used and isn't processed by inner terminal, namely the message can be retransferred directly between the two external terminals to reach purpose of inner interconnection.
Description
Technical field
The present invention relates to equipment of the core network MGW and MGC in WCDMA system and the NGN system, the method for virtual support medium gateway internal intercommunication on MGW equipment.
Background technology
In the WCDMA system and in the NGN system, the switching equipment of core net realizes that carrying separates with controlled function, be that original switching equipment is separated into two equipment MGC and MGW, MGC equipment is realized CCF, MGW realizes carrying control and carrying interactive function, the carrying media that MGW supports can be TDM, ATM or IP, and MGC passes through H.248/MGCP agreement control MGW.In the WCDMA system, separate the back structure as shown in Figure 1.Among the figure
The GERAN:GSM Access Network;
The UTRAN:WCDMA Access Network;
HLR: attaching position register.
The general communication process brief description of two MGW is as follows: suppose to have two MGW, be respectively MGW1 and MGW2, be carried as TDM (being Nb interface) between them, two MGW are controlled by same MGC, communication interface between MGW and the MGC is a Mc interface, and H.248 communications protocol is.When needing at the user User1 of MGW1 and during in the user User2 of MGW2 communication, calling control flow as shown in Figure 2:
(1) MGC selects the gateway MGW1 of user User1 side, and notice MGW1 increases the end points T1 of User1 side, returns MGC after MGW is intact;
(2) MGC selects the gateway MGW2 of user User2 side, the carrying end T2 that notice MGW1 increases and MGW2 links, and MGW1 is changed to connection status to T1 and T2 automatically, returns MGC after finishing;
(3) MGC notice MGW2 increases the carrying end T3 that is connected with MGW1, and T2 end points on MGW1 under the TDM carrying situation and T3 end points acquiescence are in connection status, return MGC after finishing;
(4) MGC notice MGW2 increases user User2 side point T4, then T3 and T4 end points is coupled together, and returns MGC.Such two users have just set up annexation by four end points;
(5) other process is omitted at this.
According to agreement regulation, a MGW is controlled by a MGC only, if MGW will be subjected to the control of a plurality of MGC, needs to divide Virtual Media Gateway, promptly the media gateway device of a physics, is divided into the media gateway device of a plurality of logics.Each media gateway in logic is called Virtual Media Gateway (VMGW), can independently accept the control of a MGC equipment.Like this, two VMGW entities on same physics MGW equipment are equivalent to two independent MGW equipment concerning MGC, and they need communication mutually, and concerning MGC equipment, their mutual communication is considered to the communication of equipment room.
The applicable cases of VMGW intercommunication is a lot, as MGW during as comprehensive gateway exchange, two systems of NGN and WCDMA need pass through this MGW intercommunication, then can mark two VMGW, each VMGW is subjected to the MGC control of NGN system respectively and controlled by the MGC of WCDMA system, and the problem of two system's intercommunications has just become the problem of intercommunication between the VMGW.
The intercommunication of two VMGW can be used as two autonomous devices and equally carries out PERCOM peripheral communication, a kind of method that realizes intercommunication is that the bearing resource between them is set to IP, route winding by the external IP network, can send to another one VMGW to the IP bag that sends from a VMGW, need not do special processing in MGW inside.But this method by the external network intercommunication has significant disadvantages, once being if VMGW supported IP carrying originally, utilize IP carrying carrying out intercommunication again, a VMGW just occurring, both direction is arranged is IP carrying, and issuing the direction that can't indicate the IP end points when increasing the order of IP end points by standard MGC, unless so MGC carries additional information, if as indicating the sign or the office direction of IP network, MGW has no idea to handle this situation; Communication at two logic entities of a physical equipment inside need obviously not conform to convention by external network in addition, has promptly wasted used devices communicating ability and the external network bearing resource of intercommunication, can cause the time delay of communication to increase again.So need the inner interoperability methods of a kind of simple and high-efficient.
Summary of the invention
The purpose of this invention is to provide a kind of method of between the VMGW of same physics MGW inside, carrying out inner intercommunication, effectively reduce the resource cost and the communication delay of communication between two VMGW.
The method of carrying out inner intercommunication between the realization VMGW of the present invention comprises the following steps:
A) the inside bearing resource of intercommunication between the configuration VMGW in MGW;
B) Media Gateway Controller (MGC) obtains above-mentioned configuration information;
C) MGW judges whether it is that inner terminal is operated according to the message that configuration information and MGC issue, if not, after then handling by normal messages, echo reply message; If then carry out step D;
D) judge whether it is to increase an inner terminal, if not, then inner terminal is carried out respective handling by the normal running flow process after, echo reply message; If then carry out step e;
E) judge whether its partner's end points exists, if not, then increase the end points Message Processing, and this terminal point information is inserted an inner terminal information table, echo reply message by normal; If, then with the context relation of two inner terminals, being merged into a context, external terminal is by this context direct communication, echo reply message then in back voice or the data forwarding process.
Described inner bearing resource can be IP carrying, ATM carrying or TDM carrying.
Described step B can realize by the resource distribution of configuration inside bearing resource consistent with MGW on MGC or the audit function acquisition MGW by MGCP.
Described step C judges whether it is that inner terminal is operated, and comprising:
C1) configuration information of searching on the MGW according to TDM carrying time slot is judged;
C2), judge whether inner carrying, in this carrying if then the ATM endpoint that distributes is exactly an inner terminal, otherwise is external terminal according to the configuration information of ATM carrying;
C3), judge whether inner carrying, in this carrying if then the IP end points that distributes is exactly an inner terminal, otherwise is external terminal according to the configuration information of IP carrying.
Among the described step C2,, then judge according to the configuration of this ATM bearer network if having only an ATM bearer network; If a plurality of ATM bearer networks are arranged, then, judge whether it is inner carrying according to this configuration information at first according to the configuration information of the ATM bearer network of the office direction information searching correspondence of carrying in the message; Among the described step C3,, then judge according to the configuration of this IP bearer network if having only an IP bearer network; If a plurality of IP bearer networks are arranged, then, judge whether it is inner carrying according to this configuration information at first according to the configuration information of the IP bearer network of the office direction information searching correspondence of carrying in the message.
Described step e comprises:
E1) if increase a TDM inner terminal newly, in the inner terminal information table, search,, think that then partner's end points exists, otherwise think that partner's end points does not exist if this TDM termination is present in the information table according to the gap information in the Endpoint ID;
E2) when increasing an IP inner terminal newly,, if the order that receives is to prepare carrying, then returns partner's end points and do not exist, and local terminal IP terminal point information is inserted the inner terminal information table if use IPBCP to set up carrying; If the order that receives is to set up carrying, after IPBCP consults to finish, obtain the IP address and the port number information of partner's end points, search the inner terminal information table, obtain the context of partner's end points; If MGC by change order notice peer IP address and port numbers, if the order that receives is to prepare carrying, then returns partner's end points and does not exist, and local terminal IP terminal point information is inserted the inner terminal information table; When IP address that receives change order notice inner terminal and port number information, search the inner terminal information table according to this IP address and port numbers, obtain partner's end points context;
E3) if newly-increased end points is the ATM inner terminal, is identified at according to bearer network and searches partner's end points in the inner terminal information table,, then return partner's terminal point information if find.
The context relation of described two inner terminals comprises:
If have only an inner terminal to distribute context, and the Context identifier of two VMGW do not conflict, and the inner terminal that then increases newly uses partner's end points context distributed;
If distributed context respectively in two VMGW, in MGW inside two Context identifier are inserted a context relation information table, merge two contextual contents, become a context.
Described to inner terminal carry out respective handling comprise to inner terminal make amendment, reporting events, playback, deletion or audit operation.
Use method of the present invention can effectively solve the direct mutually communication issue in inside between the VMGW.
Description of drawings
Fig. 1 is carrying and system construction drawing after controlled function is separated in the WCDMA system.
Fig. 2 is the process schematic diagram that two media gateway realization are called out.
Fig. 3 is the basic model figure that communicates by letter between two VMGW among the physics MGW.
Fig. 4 is the inside and outside bearing resource configuration schematic diagram of a physics MGW.
Fig. 5 is an inner interoperability methods flow chart between the realization VMGW of the present invention.
Embodiment
The present invention reaches the purpose of supporting the VMGW intercommunication by changing the processing procedure of MGW equipment to message related to calls.Below explanation is a universal process, applicable to all MGC and the call flow between the MGW.
Between the MGW basic model of communication as shown in Figure 3, wherein
Inner terminal: the end points that refers to be used between the VMGW inner intercommunication;
External terminal: refer to the end points that a physics MGW externally embodies;
Inner terminal T1 and T2 be partner's end points each other; External terminal T3 and T4 be partner's end points each other.
Below the outside refers to physics MGW outside in the explanation, and inside refers to concern between two VMGW of physics MGW inside.
1, the configuration of inner intercommunication resource between the VMGW
Two VMGW are presented as independently MGW equipment to MGC Server, the inside bearing resource that needs configuration intercommunication between two VMGW, as IP, ATM or TDM, these inner bearing resources are except that taking the address resource, there is not and does not need to carry out actual communication process in the actual physical link circuit resource on MGW, and MGC Server can use identical configuration information or obtain the resource distribution situation of MGW by the audit function of MGCP (H.248/MGCP).Can configuration of IP between two VMGW, among ATM, the TDM any be as inner bearing resource, as shown in Figure 4.
In order to satisfy requirement professional and that use, need inner bearing resource be limited according to the configuring condition restriction of external bearer resource.
(1) if the external bearer resource all is the TDM carrying, then inner bearing resource also is configured to the TDM carrying; Because, can cause the encoding and decoding speech conversion and control complicated as if configuration packet IP or ATM carrying between two TDM carryings.
(2) if the external bearer resource has at least one to be IP carrying or ATM carrying, if inner carrying also is configured to IP or ATM carrying, cause that a VMGW is a packet bearer on both direction, then need MGC when notice MGW increases IP of packet or ATM endpoint, to indicate office direction information.
(3) if the external bearer resource all is IP carrying or ATM carrying, then inside carries not that proposed arrangement is the TDM carrying; Because in WCDMA uses, inner bearing resource is configured to the TDM carrying, can influence the TrFO business, in other is used, also can cause the complicated of the conversion of encoding and decoding or control operation.
(4) can to dispose inner bearing resource arbitrarily be IP/ATM/TDM to other situation, need illustrate in the configuration information on MGW: the VMGW that office direction information, carrying are corresponding etc.
Above-mentioned configuration order can have multiple implementation, as configuration order is:
AddRes VMGW1 IN IP
First field is order; Second field indicates it is which VMGW is configured; The 3rd field indicates it is which direction, also can be for 1,2,3, or the like; The 4th field represents that bearing resource is IP.
2, intercommunication basic process
Method flow such as Fig. 5 specify as follows as showing:
(1) after MGW receives the message of MGC, judges whether inner terminal is operated,, return after then handling by normal messages if not inner terminal is operated; If inner terminal is operated, change (2);
(2) judge whether to increase inner terminal message, if not, then inner terminal is carried out other processing; If, judge whether partner's end points has been present in certain context, if partner's end points does not exist, then then this end points is inserted in the inner terminal description list by the normal end points Message Processing that increases, return; If partner's end points exists, change (3);
(3), be merged into a context the context relation of inner partner's end points; Such two external partners end points reach the purpose of inner intercommunication by the direct communication of this context.
3, judge the inner terminal process
The inner intercommunication carrying of the VMGW that disposes on MGC Sever and MGW can be the IP/ATM/TDM carrying, and different different the judging whether that carry are to carry out method of operating at inner terminal.
(1) TDM carrying
Search configuration information according to TDM carrying time slot, should identify whether internal time slot of each time slot in the TDM configuration information.
(2) ATM carrying
Search ATM carrying configuration information, if having only an ATM bearer network, then the configuration information according to this ATM bearer network judges whether to be the inside carrying; If a plurality of ATM bearer networks are arranged, at first, judge whether inner carrying according to configuration information again according to the configuration information of the ATM bearer network of the office direction information searching correspondence of carrying in the message, if, then the ATM endpoint that distributes in this carrying is exactly an inner terminal, otherwise is external terminal.
(3) IP carrying
Search IP carrying configuration information,, then judge whether to be the inside carrying according to this bearer network configuration information if having only an IP bearer network; If a plurality of ATM bearer networks are arranged, at first, judge whether inner carrying according to configuration information again according to the configuration information of the ATM bearer network that increases the office direction information searching correspondence of carrying in the end points message, if, then the IP end points that distributes in this carrying is exactly an inner terminal, otherwise is external terminal.
4, inquiry partner end points process
Inner carrying can be three kinds of carryings of ATM/IP/TDM, the process difference of the inquiry partner end points of different bearer.
(1) TDM termination
When increasing a TDM termination newly, the implicit TDM gap information that comprises of TDM termination sign, the character of the time slot unanimity at two ends during according to the TDM intercommunication, search the inner terminal information table, if this TDM termination is present in the information table, think that then another terminal point information has been added into context, therefrom can obtain the place contextual information, and this end points is also added the inner terminal information table;
If an existing more than identical TDM termination exists in the table, then point out error message, return failed message.
(2) IP end points
IP carrying establish two kinds of processes: use IPBCP to set up carrying and MGC Server notifies peer IP address and port number information by the change order.
I, if use IPBCP to set up carrying, the order that receives as VMGW is that then this moment, partner's end points did not also increase when preparing carrying, and local terminal IP terminal point information is inserted the inner terminal information table, returns partner's end points and does not exist; The order that receives as VMGW is to set up carrying, and after IPBCP consulted to finish, information such as the IP address of acquisition partner end points and port numbers were searched the inner terminal information table, obtain the context of partner's end points, return;
II, if MGC Server by change order notice peer IP address and port numbers, VMGW prepares carrying when increasing end points receiving, and terminal point information is inserted the inner terminal information table, does not have partner's terminal point information, returns partner's end points and does not exist; When receiving the information such as IP address of change order notice inner terminal, according to information searching inner terminal information tables such as peer IP address, obtain partner's terminal point information, return.
(3) ATM endpoint
Judge that inner ATM endpoint can only carry out when the process of setting up carrying increases ATM endpoint, when preparing to increase ATM endpoint in the process of carrying, another ATM endpoint does not also increase, and only needs terminal point information is inserted the inner terminal information table.
After MGW receives and sets up ATM carrying order,, be identified at according to bearer network and search partner's terminal point information in the inner terminal information table, if search successfully, return partner's terminal point information, otherwise return unusual if inner terminal need not to carry out the Q.AAL2 bearer negotiation.
5, context relation process
When the contextual information of two inner partner's end points and they identified, then two context relations.
(1) if two inner terminals have only one to distribute context, and the Context identifier of two VMGW do not conflict, and increases inner terminal newly and uses partner's end points context distributed, and promptly context merges;
(2) if distribute context respectively in two VMGW, externally be presented as two contexts, in MGW inside two Context identifier inserted the context relation information table, merge two context, actual have only a context to exist;
(3) merge the back context and comprise original two contextual all information, promptly relevant with inner terminal information also all is included in the context, and MGC Server cannot see merging process, can also carry out various operations respectively to these two inner terminals;
(4) when the inner beared information of MGW is transmitted, only use the context after merging, just between two external terminals, directly transmit beared information,, reach inner intercommunication purpose without the processing of inner terminal.
6, the processing method behind the context relation
After context merged, MGC Server can also operate inner terminal, comprises modification, reporting events, playback, deletion, audit etc.To some operation of inner terminal,, can directly in context, operate on the external terminal of inner terminal correspondence as incident, signal etc.Behind the deletion inner terminal, two contexts recover independence.
The invention provides a kind of method of between the VMGW of same physics MGW inside, carrying out inner intercommunication, effectively reduce the resource cost and the communication delay of communication between two VMGW, increased the flexibility that VMGW uses.
Claims (8)
1, the method for intercommunication between a kind of Virtual Media Gateway (VMGW) is implemented between the inner VMGW of same physical media gateway (MGW) and carries out inner intercommunication, comprises the following steps:
A) the inside bearing resource of intercommunication between the configuration VMGW in MGW;
B) Media Gateway Controller (MGC) obtains above-mentioned configuration information;
C) MGW judges whether it is that inner terminal is operated according to the message that configuration information and MGC issue, if not, after then handling by normal messages, echo reply message; If then carry out step D;
D) judge whether it is to increase an inner terminal, if not, then inner terminal is carried out respective handling by the normal running flow process after, echo reply message; If then carry out step e;
E) judge whether its partner's end points exists, if not, then increase the end points Message Processing, and this terminal point information is inserted an inner terminal information table, echo reply message by normal; If, then with the context relation of two inner terminals, being merged into a context, external terminal is by this context direct communication, echo reply message then in back voice or the data forwarding process.
2, the method for intercommunication between the Virtual Media Gateway as claimed in claim 1 (VMGW) is characterized in that: described inner bearing resource can be IP carrying, ATM carrying or TDM carrying.
3, the method for intercommunication between the Virtual Media Gateway as claimed in claim 1 (VMGW) is characterized in that: described step B can realize by the resource distribution of configuration inside bearing resource consistent with MGW on MGC or the audit function acquisition MGW by MGCP.
4, the method for intercommunication between the Virtual Media Gateway as claimed in claim 1 (VMGW), it is characterized in that: described step C judges whether it is that inner terminal is operated, and comprising:
C1) configuration information of searching on the MGW according to TDM carrying time slot is judged;
C2), judge whether inner carrying, in this carrying if then the ATM endpoint that distributes is exactly an inner terminal, otherwise is external terminal according to the configuration information of ATM carrying;
C3), judge whether inner carrying, in this carrying if then the IP end points that distributes is exactly an inner terminal, otherwise is external terminal according to the configuration information of IP carrying.
5, the method for intercommunication between the Virtual Media Gateway as claimed in claim 4 (VMGW) is characterized in that: among the described step C2, if having only an ATM bearer network, then judge according to the configuration of this ATM bearer network; If a plurality of ATM bearer networks are arranged, then, judge whether it is inner carrying according to this configuration information at first according to the configuration information of the ATM bearer network of the office direction information searching correspondence of carrying in the message; Among the described step C3,, then judge according to the configuration of this IP bearer network if having only an IP bearer network; If a plurality of IP bearer networks are arranged, then, judge whether it is inner carrying according to this configuration information at first according to the configuration information of the IP bearer network of the office direction information searching correspondence of carrying in the message.
6, the method for intercommunication between the Virtual Media Gateway as claimed in claim 1 (VMGW), it is characterized in that: described step e comprises:
E1) if increase a TDM inner terminal newly, in the inner terminal information table, search,, think that then partner's end points exists, otherwise think that partner's end points does not exist if this TDM termination is present in the information table according to the gap information in the Endpoint ID;
E2) when increasing an IP inner terminal newly,, if the order that receives is to prepare carrying, then returns partner's end points and do not exist, and local terminal IP terminal point information is inserted the inner terminal information table if use IPBCP to set up carrying; If the order that receives is to set up carrying, after IPBCP consults to finish, obtain the IP address and the port number information of partner's end points, search the inner terminal information table, obtain the context of partner's end points; If MGC by change order notice peer IP address and port numbers, if the order that receives is to prepare carrying, then returns partner's end points and does not exist, and local terminal IP terminal point information is inserted the inner terminal information table; When IP address that receives change order notice inner terminal and port number information, search the inner terminal information table according to this IP address and port numbers, obtain partner's end points context;
E3) if newly-increased end points is the ATM inner terminal, is identified at according to bearer network and searches partner's end points in the inner terminal information table,, then return partner's terminal point information if find.
7, the method for intercommunication between the Virtual Media Gateway as claimed in claim 1 (VMGW), it is characterized in that: the context relation of described two inner terminals comprises:
If have only an inner terminal to distribute context, and the Context identifier of two VMGW do not conflict, and the inner terminal that then increases newly uses partner's end points context distributed;
If distributed context respectively in two VMGW, in MGW inside two Context identifier are inserted a context relation information table, merge two contextual contents, become a context.
8, the method for intercommunication between the Virtual Media Gateway as claimed in claim 1 (VMGW) is characterized in that: described to inner terminal carry out respective handling comprise to inner terminal make amendment, reporting events, playback, deletion or audit operation.
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| WO2008151559A1 (en) * | 2007-06-11 | 2008-12-18 | Huawei Technologies Co., Ltd. | A method, apparatus and system for selection of virtual media gateway |
| US8165126B2 (en) | 2007-06-11 | 2012-04-24 | Huawei Technologies Co., Ltd. | Method, apparatus and system for selecting VMG |
| CN101123612B (en) * | 2007-08-02 | 2010-04-21 | 华为技术有限公司 | Method and communication device for virtual media capability negotiation |
| CN101378535B (en) * | 2007-08-27 | 2011-12-07 | 华为技术有限公司 | Method, system and apparatus for controlling message by transmission medium flow |
| CN101394445B (en) * | 2008-10-22 | 2012-05-16 | 中兴通讯股份有限公司 | System and method for implementing encoding and decoding conversion function |
| CN102404135A (en) * | 2010-09-14 | 2012-04-04 | 中兴通讯股份有限公司 | Internet protocol (IP) bearer optimizing determining method and system based on virtual media gateway |
| CN102404135B (en) * | 2010-09-14 | 2015-06-03 | 中兴通讯股份有限公司 | Internet protocol (IP) bearer optimizing determining method and system based on virtual media gateway |
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| CN100387031C (en) | 2008-05-07 |
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