CN101515936B - Multi-domain intercommunicating method, system and device - Google Patents

Multi-domain intercommunicating method, system and device Download PDF

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Publication number
CN101515936B
CN101515936B CN200910127161.6A CN200910127161A CN101515936B CN 101515936 B CN101515936 B CN 101515936B CN 200910127161 A CN200910127161 A CN 200910127161A CN 101515936 B CN101515936 B CN 101515936B
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China
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called
caller
domain
media
address
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CN101515936A (en
Inventor
苏炜
任慧鹏
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN200910127161.6A priority Critical patent/CN101515936B/en
Publication of CN101515936A publication Critical patent/CN101515936A/en
Priority to PCT/CN2010/071062 priority patent/WO2010105547A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/102—Gateways
    • H04L65/1023—Media gateways
    • H04L65/103—Media gateways in the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H04L61/251—Translation of Internet protocol [IP] addresses between different IP versions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H04L61/2521—Translation architectures other than single NAT servers
    • H04L61/2528—Translation at a proxy

Abstract

The invention discloses a multi-domain intercommunicating method, comprising: receiving user request; analyzing the user request to obtain the medium direction from the calling to the called and the domain mark of the called; and sending the medium direction from the calling to the called and the domain mark of the called. The embodiment of the invention further provides a system and a device for the multi-domain intercommunication. According to the medium direction and the domain mark, the embodiment of the invention can indicates the end of the current message to be processed, thereby, the multi-domain intercommunication can be achieved.

Description

Multi-domain intercommunicating method and system and device
Technical field
The present invention relates to communication technical field, be specifically related to multi-domain intercommunicating method and system and device.
Background technology
The IP multimedia subsystem, IMS (IMS, IPMultimedia Subsystem) of internet protocol-based (IP, Internet Protocol) is the subsystem of the support IP multimedia service of 3G (Third Generation) Moblie partnership proposition.The important feature of IMS is to the extensive adaptability of various input fields and powerful interoperability.IMS user's face mainly is comprised of Internet protocol the 4th edition (IPv4) and Internet protocol the 6th edition (IPv6) at present based on IP carrying.The IPv4 agreement is the Internet Protocol of present widespread deployment.Along with the fast development of internet, there have been the problems such as address space is not enough, routing table list item quantity is excessive in IPv4.In order to solve the inadequate problem in address, third generation partner program (3GPP/TISPAN) has been introduced network address port conversion-protocol conversion (NAPT-PT, Network Address Port Transfer-ProtocolTransfer) scheme.
In existing technical scheme, by Interconnection Border Control Function entity (IBCF, InterconnectionBorder Control Function) passes through the control of Gq ' interface based on the policy deciding functional entity (SPDF of service, Service-based Policy Decision Function), then finish NAPT-PT by SPDF by Ia interface control intercommunication border medium gateway function entity (I-BGF, Interconnection Border GatewayFunction).When IBCF receives from first request (such as INVITE Offer), according to far-end (IP1, Port1) application IP addresses to then local terminal address (IP3, Port3); When IBCF receives from second request (such as INVITE Answer), according to far-end (IP4, Port4) application IP addresses to then local terminal address (IP2, Port2).Right by these two address mappings, can realize the mapping of NAPT-PT media.
In the research and practice process to prior art, the present inventor finds in existing technical scheme, comparatively simple and Gq ' the interface control ability of NAPT-PT scheme a little less than, it mainly is that IBCF passes through Gq ' and issues binding information (Binding-Information) and media and form (Media-Component-Description) information of description and issue the media map information, but these two message can only realize the intercommunication of single domain, can not realize the problem of multi-domain intercommunicating by this NAPT-PT scheme and Gq ' interface.
Summary of the invention
The embodiment of the invention provides a kind of multi-domain intercommunicating method and corresponding system and device.
A kind of multi-domain intercommunicating method method comprises:
Receive user's request;
Analyze the caller of described user's acquisition request to called media direction and called domain identifier;
Send described caller to called media direction and described called domain identifier.
A kind of multi-domain intercommunicating system comprises:
The Interconnection Border Control Function entity is used for receiving user's request, analyzes the caller of described user's acquisition request to called media direction and called domain identifier, sends described caller to called media direction and called domain identifier;
The gateway function entity is used for receiving caller to called media direction and called domain identifier, specifies called media address according to described caller to called media direction and called domain identifier.
A kind of Interconnection Border Control Function entity comprises:
Receiving element is used for receiving user's request;
Analytic unit is used for analyzing the caller of described user's acquisition request to called media direction and called domain identifier;
Transmitting element is used for sending described caller to called media direction and described called domain identifier.
A kind of gateway function entity comprises:
Receiving element is used for receiving caller to called media direction and called domain identifier;
Designating unit is used for specifying called media address according to described caller to called media direction and described called domain identifier.
The embodiment of the invention can indicate the end points that needs to process current message by media direction and domain identifier, thereby can realize the intercommunication between the multiple domain.
Description of drawings
Fig. 1 is the schematic diagram of a kind of multi-domain intercommunicating method of the present invention;
Fig. 2 is the flow chart of a kind of another embodiment of multi-domain intercommunicating method of the present invention;
Fig. 3 is the signaling process figure for a kind of another embodiment of multi-domain intercommunicating method of the present invention;
Fig. 4 is the structure chart of a kind of multi-domain intercommunicating of the present invention embodiment of system;
Fig. 5 is the structure chart for an embodiment of a kind of Interconnection Border Control Function entity of the present invention;
Fig. 6 is the structure chart of an embodiment of a kind of gateway function entity of the present invention.
Embodiment
The embodiment of the invention provides a kind of multi-domain intercommunicating method, by media direction and domain identifier, can indicate the end points that needs to process current message, thereby can realize the intercommunication between the multiple domain.Such as the intercommunication between the address field (IPV4) that can finish intercommunication between the public and private net of identical address field (IPV4), address overlap, intercommunication between the different address field (IPv4-IPv6) and realize intercommunication between the multiple domain by a gateway function entity (I-BGF, Interconnection Border Gateway Function).The embodiment of the invention also provides corresponding system and device.Below be elaborated respectively.
The embodiment of the invention mainly realizes the intercommunication of multimedia address field by the concept of territory (domain name).Network interconnection agreement (IP Internet Protocol) IP multimedia subsystem, IMS (IMS IP Multimedia Subsystem) is different according to command transmitting and carrying, can be divided into signaling plane and loading end, the embodiment of the invention is divided into different territories with loading end with respect to the difference of Interconnection Border Control Function entity I-BGF position, with inner (Inner) territory and the difference of territory, outside (Outer).The Inner territory with respect to I-BGF, represents the different territory in this territory; The Outer territory, with respect to I-BGF, the different territory of expression foreign lands.
By exemplary being described as follows of Fig. 1.Terminal A 1 and A2 are positioned at the Inner territory with respect to I-BGF; Terminal B 1 and B2 are positioned at the Outer territory with respect to I-BGF.In addition, apart from the closer end points of I-BGF, Local can be called, apart from the distant end points of I-BGF, Remote can be called.Thereby end points 1 can be called the Remote end points in the Inner territory of terminal A 1, and end points 1` can be called the Local end points in the Inner territory of terminal A 1, and end points 1 and 1` are respectively the source and destination end points of terminal A 1 physical medium stream.In like manner, end points 2 can be called long-range (Remote) end points in the Outer territory of terminal B 1, and end points 2` can be called the Local end points in the Outer territory of terminal B 1; Terminal A 2 and terminal B 2 can so be divided equally.In addition, the domain identifier of supposing terminal A 1 is territory (Domain) 1; The domain identifier of terminal A 2 is Domain2; The domain identifier of terminal B 1 is Domain3; The domain identifier of terminal B 2 is Domain4.
In embodiments of the present invention, the direction of definition carrying, namely the direction of media shows that carrying is from the Inner territory to the Outer territory, perhaps from the Outer territory to the Inner territory.Such as Interconnection Border Control Function entity (IBCF, Interconnection Border Control Function) creating the territory that issues simultaneously the I-BGF both sides when media shine upon, as from Inner territory or Outer territory, and indicate the direction of media (i.e. carrying) mapping of this time establishment: INNER TO OUTER, perhaps OUTER TO INNER.
As the IBCF request of receiving (such as INVITE Offer), can be according to end points 1 (the Remote end points in Inner territory) application IP addresses to end points 2` (the Local end points in Outer territory) address then; In like manner, as the IBCF request of receiving (such as INVITE Answer), can be according to end points 2 (the Remote end points in Outer territory) application IP addresses to end points 1` (the Local end points in Inner territory) address then.Thereby it is right to set up the address mapping.
Describe in detail below by specific embodiment.
Embodiment one, see also the flow chart that Fig. 2 is an embodiment of a kind of multi-domain intercommunicating method of the present invention.
Step 101, reception user request;
Step 102, the caller of the described user's acquisition request of analysis are to called media direction and called domain identifier;
The caller of analysis user acquisition request can comprise to called media direction:
Described user request is analyzed, obtained caller and belong to external domain or interior fields, called external domain or the interior fields of belonging to, according to caller and called external domain or the interior fields of belonging to, obtain caller to called media direction.Belong to interior fields such as caller, the called external domain that belongs to, then caller is that interior fields is pointed to external domain to called media direction; Belong to external domain such as caller, the called interior fields that belongs to, then caller is that external domain points to interior fields to called media direction; Belong to interior fields such as caller, the called interior fields that belongs to, then caller is that interior fields is pointed to interior fields to called media direction; Belong to external domain such as caller, the called external domain that belongs to, then caller is that external domain points to external domain to called media direction.
Further, can the calling Uniform Resource Identifier URI in the call request be analyzed, obtains described called external domain or the interior fields of belonging to:
When described URI is SIP URI, obtain the IP address according to described URI, obtain called external domain or the interior fields of belonging to according to described IP address search allocation list;
When described URI is TEL URI, according to number section inquiry IP address, obtain called external domain or the interior fields of belonging to according to described IP address search allocation list.
User's request is carried by message.
Step 103, the described caller of transmission are to called media direction and described called domain identifier.
Further, can also comprise the domain identifier of analyzing the caller of described user's acquisition request.
Further, described method also comprises:
The message of called media address is carried in reception;
Media address in described user's request is revised as described called media address, transmits described amended user and ask called.
Transmit described amended user ask called after, can further include:
Receive the called message of returning;
Analyze described message and obtain the media direction that is called into caller and called domain identifier;
Send described media direction and the described called domain identifier that is called into caller.
The media direction that is called into caller can adopt the method described in the step 2 to obtain.
The embodiment of the invention can indicate the end points that needs to process current message by media direction and domain identifier, thereby can realize the intercommunication between the multiple domain.In the prior art, Gq ' issues binding information and media form the media map information that description issues an end points owing to employing IBCF passes through, and can only realize the intercommunication between the single domain.
Further, the embodiment of the invention issues the domain identifier in territory, intercommunication end points place by sending domain identifier and media direction in session, and indicates the end points of processing current message by the media direction, thereby realizes the intercommunication between the multiple domain.
Seeing also Fig. 3 is the signaling process figure of an embodiment of a kind of multi-domain intercommunicating method of the present invention.
Step 201, IBCF receive user's request, analyze the caller of described user's acquisition request to called media direction and called domain identifier;
After IBCF receives user's request, obtain the media address of caller in the Session Description Protocol (SDP, Session Description Protocol) from described user's request.
Can dispose a table at IBCF and realize, obtain caller by the media address inquiry of caller and belong to external domain or interior fields.It is as shown in table 1,
IP SipDomain INNER territory whether
192.168.1.0 Domain1 Y
172.168.1.0 Domain3 N
。。 。。。 。。。
Table 1
Lets call is from 192.168.1.0, and by above-mentioned analysis, then caller belongs to interior fields, i.e. this calling comes from interior fields.
Further, can obtain the domain identifier of caller according to the media address inquiry of caller, lets call is from 192.168.1.0, and then the domain identifier of caller is Domain1.
Suppose can not get the IP address of caller, the domain name Sip Domain query configuration table in signaling territory that equally can be by caller obtains caller and belongs to external domain or interior fields.Lets call is from Domain1, and then caller belongs to interior fields.
Certainly be not limited to media address and the Sip Domain of caller, other information of caller also can be used for obtaining caller and belong to external domain or interior fields.
Analyze calling out Uniform Resource Identifier (URI, Uniform Resource Identifier), can obtain called external domain or the interior fields of belonging to.
For SIP URI, IBCF can obtain the IP address according to URI, and obtains called interior fields or the external domain of belonging to according to IP address search table 1, i.e. this calling is exhaled toward interior fields or external domain.Can certainly judge called interior fields or the external domain of belonging to by SipDomain.
For TEL URI, IBCF needs the basis section to inquire corresponding IP address, obtains called interior fields or the external domain of belonging to according to IP address search table 1, i.e. this calling is exhaled toward interior fields or external domain.Can certainly judge called interior fields or the external domain of belonging to by SipDomain.
Take SIP URI as the example explanation as Domain3, it be 172.168.1.0 that IBCF can obtain the IP addresses according to SIP URI question blank 2, and question blank 1 again, and whether " INNER territory " is " N ", namely shows the called OUTER of belonging to territory.Because caller belongs to the INNER territory, the called OUTER territory that belongs to, then caller is arrived external domain (INNER_TO_OUTER) to called media direction for territory internally.And the domain identifier of called media is Domain3.
Be described as follows as an example of TEL URI example: obtain called number by TEL URI, see which number segment scope the number that obtains belongs in.Suppose the called 139******* of belonging to number segment in this example, by question blank 2, obtaining IP is 172.168.1.0, and question blank 1 again, and whether " INNER territory " is " N ", namely shows the called OUTER of belonging to territory.Because caller belongs to the INNER territory, the called OUTER territory that belongs to, then caller is arrived external domain (INNER_TO_OUTER) to called media direction for territory internally.And the domain identifier of called media is Domain3.
Number segment SipDomain IP MediaDomain
139******* Domain3 172.168.1.0 Domain3
133******* Domain0 172.168.2.0 Domain4
。。 。。。 。。。 。。。
Table 2
In the table 2, the domain name (SipDomain) in the domain name of media domain (MediaDomain) and signaling territory can be identical, can be not identical yet, and the present invention does not limit this.
Further, can judge called network type based on the number analysis to URI, may be IPV4, also may be IPV6.
In addition, table 1 and table 2 be exemplarily explanation just, can certainly not adopt the form of form, take any form can, as long as can obtain corresponding information.If adopt the form of form, also can table 1 and the synthetic table of table 2.
Step 202, IBCF are to policy deciding functional entity (SPDF, Service-based Policy DecisionFunction) sends resource authorization request (AAR), wherein carry caller and called domain identifier, and caller is to called media direction, be specifically as follows in the present embodiment, (INNER:Domain1-〉OUTER:Domain3).I-BGF distributes called media address by the SPDF request.
Further described resource authorization request can also be carried called affiliated network type.
Step 203, SPDF send according to the AAR message of receiving increases terminal message (ADDTermination) to I-BGF;
Preferably, SPDF can carry out the local policy inspection to AAR message, if meet local policy then send to increase terminal message (ADD Termination) to I-BGF, application distributes called media address.
Step 204, I-BGF are called appointment media address after receiving and increasing terminal message (ADD Termination);
I-BGF is according to increasing called domain identifier that terminal message (ADD Termination) carries and caller to called media direction, determine called after, be called allocation medium address.
Step 205, I-BGF send increases terminal message (ADD Termination) response message to SPDF;
After described I-BGF is called allocation medium address, by increasing terminal message (ADDTermination) response message, the described called media address of distributing is sent to described SPDF.
Step 206, SPDF send resource authorization response (AAA) message to IBCF after receiving and increasing terminal message (ADD Termination) response message;
Preferably, SPDF can preserve increases terminal message (ADD Termination) response results, and by AAA message the called media address that I-BGF distributes is returned to IBCF.
Step 207, IBCF revise the user's request of transmitting;
IBCF receives AAA message, the called media address that the I-BGF that preservation AAA message comprises distributes, and with the called media address that SDP in the original user request is revised as the address I-BGF distribution, then transmit described user and ask called.
Step 208, IBCF receive called return 183, analyze described message and obtain the media direction that is called into caller and the domain identifier of caller;
IBCF receives 183 response messages, and wherein said 183 response messages carry called subscriber's SDP.From SDP, obtain media address, obtain simultaneously the media direction that is called into caller.Can obtain the media direction that is called into caller according to the method that step 201 is introduced, and domain identifier.Owing to be that called returning pointed to 183 of caller, be that external domain points to interior fields, namely (OUTER_TO_INNER) so be called into the media direction of caller herein;
Caller and called domain identifier can be that preceding step obtains rear preservation.
Step 209, IBCF send resource authorization request (AAR) to SPDF, wherein carry caller and called domain identifier, and the media direction that is called into caller, in the present embodiment, be specifically as follows (OUTNER:Domain3-〉INNER:Domain1), by the media address of SPDF request I-BGF distribution caller.
Further described resource authorization request can also be carried called affiliated network type.
Step 210, SPDF send according to the AAR message of receiving increases terminal message (ADDTermination) to I-BGF;
SPDF carries out the local policy inspection to AAR, if meet local policy then send to increase the media address that terminal message (ADD Termination) application distributes caller to I-BGF.
Step 211, I-BGF receive increases the rear media address of distributing caller of terminal message (ADD Termination);
I-BGF is according to the domain identifier that increases terminal message (ADD Termination) caller and be called into the media direction of caller, determine caller after, distribute the media address of caller.
Step 212, I-BGF send increases terminal message (ADD Termination) response message to SPDF;
After described I-BGF is caller allocation medium address, by increasing terminal message (ADDTermination) response message, the media address of the caller that distributes is sent to described SPDF.
Step 213, SPDF send AAA message to IBCF;
Preferably, SPDF can preserve increases terminal message (ADD Termination) response results, and the media address of the caller that I-BGF is distributed by AAA message returns to IBCF.
Step 214, IBCF transmit 183 (SDP4);
IBCF preserves the caller media address of the I-BGF appointment of AAA, and then the caller media address that the I-BGF appointment is revised as in address among the SDP is transmitted 183.
Media Stream intercommunication after IBCF receives invitation Invite 200OK.
The embodiment of the invention can indicate the end points that needs to process current message by media direction and domain identifier, thereby can realize the intercommunication between the multiple domain.In the prior art, Gq ' issues binding information and media form the media map information that description issues an end points owing to employing IBCF passes through, and can only realize the intercommunication between the single domain.
Can solve the intercommunication (IPv4-IPv6) between the multiaddress territory in different IP territory in the embodiment of the invention.As above UE1 comes from Vlan1, if its up territory is IPv6, when IBCF receives UE1 Invite (SDPOffer), issue Inner territory (Domain1), Outer territory (Domain3), direction INNER TOOUTER (Domain1-〉Domain3), I-BGF can distribute IPv6 address in the address pool according to Domain3; If its up territory is IPv4, IBCF issues Inner territory (Domain1), Outer territory (Domain4), direction INNER TO OUTER (Domain1 to Domain4), and I-BGF can distribute IPv4 address in the address pool according to Domain4.By this scheme, I-BGF can carry out the differentiation in purpose territory, realizes the intercommunication from IPv4-Ipv6.
The intercommunication of realization multiple exit address field also can be adopted the described flow process of present embodiment, come from Domain1 such as UE1, IBCF finds that by call analysis the UE1 call intent is Domain3, this moment IBCF to issue its purpose territory be Domain3, therefore I-BGF is created to the mapping of Domian3; If the UE1 call intent is Domain4, it is Domain4 that IBCF issues the purpose territory, and therefore I-BGF is created to the mapping of Domian4.Realize so the not intercommunication between the same area on the I-BGF.
Realize intercommunication for the method that adopts the embodiment of the invention to provide between the multiaddress territory of address overlap.For example UE1 comes from Vlan1, and its territory is (domain1, binding eth0, IP:192.168.1.1), and up by I-BGF eth7 interface, it is 172.1.1.1:10000 that I-BGF distributes the address.Come from Vlan2 such as UE2, its territory is (domain2, binding eth1, IP:192.168.1.1), and up by I-BGF eth7 interface, it is 172.1.1.1:10002 that I-BGF distributes the address.When receiving that UE1 invites (SDP Offer), IBCF issues Inner territory (Domain1), Outer territory (Domain4), SDP direction INNER TOOUTER (Domain1-〉Domain4), I-BGF distributes the media address of corresponding Domain4 address pool; When receiving UE2 183 (SDPAnswer), IBCF issues Inner territory (Domain1), Outer territory (Domain4), direction OUTER TO INNER (Domain4-〉Domain1), I-BGF distributes the media address of corresponding Domain1 address pool; The calling of initiating for UE2 also is like this.I-BGF can distinguish according to initial not same area (Domain1 and Domian2), with the intercommunication of the address field of realizing address overlap.
The embodiment of the invention can realize the intercommunication between the address field (IPV4) of intercommunication, address overlap between the public and private net of the identical address field of IMS (IPV4), the intercommunication between the different address field (IPv4-IPv6) and realize intercommunication between the multiple domain by an I-BGF.Effectively solved the interconnection and interflow in various IP address fields and the identical ip addresses territory, flexible and effective networking plan is provided.
Embodiment three, see also the structure chart that Fig. 4 is an embodiment of a kind of multi-domain intercommunicating match system of the present invention;
The embodiment of the invention is to adopt the system of above-described embodiment method, specifically comprises:
Interconnection Border Control Function entity 301 is used for receiving user's request; Analyze the caller of described user's acquisition request to called media direction and called domain identifier; Send described caller to called media direction and described called domain identifier;
In one embodiment, 301 pairs of described user's requests of described Interconnection Border Control Function entity are analyzed, obtain caller and belong to external domain or interior fields, called external domain or the interior fields of belonging to, according to caller and called external domain or the interior fields of belonging to, obtain caller to called media direction.
Concrete, calling Uniform Resource Identifier (URI in 301 pairs of call requests of Interconnection Border Control Function entity, Uniform Resource Identifier) analyzes, obtain described called external domain or the interior fields of belonging to: when described URI is SIP URI, obtain the IP address according to described URI, obtain called external domain or the interior fields of belonging to according to described IP address search allocation list;
When described URI is TEL URI, according to number section inquiry IP address, obtain called external domain or the interior fields of belonging to according to described IP address search allocation list.
Further, by the analysis to URI, can obtain called domain identifier.
Further, described Interconnection Border Control Function entity 301 is analyzed according to the SDP in the call request and is obtained the domain identifier of caller, and described domain identifier refers to belong to interior fields or external domain.
Gateway function entity 303 is used for receiving caller to called media direction and called domain identifier; Specify called media address according to described caller to called media direction and called domain identifier.
Further, the embodiment of the invention can also comprise: policy deciding functional entity 302.Described Interconnection Border Control Function entity 301 sends to described policy deciding functional entity 302 and carries caller to the request of called media direction and called domain identifier; Described policy deciding functional entity 302 is used for receiving that described Interconnection Border Control Function entity sends carries described caller to the request of called media direction and called domain identifier, and sends described caller to called media direction and called domain identifier to described gateway function entity.
In one embodiment of the invention, described policy deciding functional entity is used for receiving that described Interconnection Border Control Function entity sends carries described caller to the request of called media direction and described called domain identifier, described request is carried out the local policy inspection, then send increase terminal message ADD Termination to described gateway function entity if meet local policy, described increase terminal message ADD Termination carries caller to called media direction and called domain identifier.
Further, described gateway function entity 303 returns the called media address of distribution to policy deciding functional entity 302 by response message after also being used to specify called media address;
After described gateway function entity 303 is specified called media address, by increasing terminal (ADDTermination) response message, the described called media address of appointment is sent to described policy deciding functional entity 302; Described policy deciding functional entity 302 is preserved increases terminal message (ADD Termination) response results, and by AAA message the called media address of described gateway function entity 303 appointments is returned to described Interconnection Border Control Function entity 301; The called media address of gateway function entity 303 appointments that described Interconnection Border Control Function entity 301 preservation AAA message comprise, and SDP address in the described user request is revised as the called media address of described gateway function entity 303 appointments, then transmit described user's request according to described amended called media address.
Policy deciding functional entity 302 is preserved response messages, and by AAA message the described called media address of gateway function entity 303 appointments is sent to Interconnection Border Control Function entity 301;
Interconnection Border Control Function entity 301 is preserved described called media address, and call address in described user's request is revised as described called media address, transmits described amended user and asks called.
Further, described Interconnection Border Control Function entity 301 receives the called message of returning;
Analyze described message and obtain the media direction that is called into caller and the domain identifier of caller;
Send the described media direction of caller and the domain identifier of described caller of being called into.
The described called message of returning can be 183 response messages;
Interconnection Border Control Function entity 301 requires gateway function entity 303 to specify the media address of caller according to described 183 response messages by described policy deciding functional entity 302.
Seeing also Fig. 5 is the structure chart of an embodiment of a kind of Interconnection Border Control Function entity of the present invention;
The embodiment of the invention is to realize the device of the described method and system of above-described embodiment, is specially:
Receiving element 401 is used for receiving user's request;
Analytic unit 402 is used for analyzing the caller of described user's acquisition request to called media direction and called domain identifier;
Transmitting element 403 is used for sending described caller to called media direction and described called domain identifier.
Further, the described user's acquisition request media direction of described analytic unit 402 analyses comprises:
Analytic unit is analyzed 402 described users request, obtains caller and belongs to external domain or interior fields, called external domain or the interior fields of belonging to, and according to caller and called external domain or the interior fields of belonging to, obtains caller to called media direction.
Described receiving element 401 also is used for receiving the called message of returning;
Described analytic unit 402 also is used for analyzing described message and obtains the media direction that is called into caller and the domain identifier of caller;
Described transmitting element 403 also is used for sending being called into the media direction of caller and the domain identifier of described caller.
The Interconnection Border Control Function entity requires the gateway function entity to specify the media address of caller according to the described called message of returning.
Seeing also Fig. 6 is the structure chart of an embodiment of a kind of gateway function entity of the present invention;
Receiving element 501 is used for receiving caller to called media direction and called domain identifier;
Designating unit 502 is used for specifying called media address according to described caller to called media direction and described called domain identifier.
Further, described gateway function entity can also comprise:
Transmitting element 503 is for the called media address that sends described appointment.
The embodiment of the invention can indicate the end points that needs to process current message by media direction and domain identifier, thereby can realize the intercommunication between the multiple domain.In the prior art, Gq ' issues binding information and media form the media map information that description issues an end points owing to employing IBCF passes through, and can only realize the intercommunication between the single domain.
Further, the embodiment of the invention issues the domain identifier in territory, intercommunication end points place by sending domain identifier and media direction in session, and indicates the end points of processing current message by the media direction, thereby realizes the intercommunication between the multiple domain.
One of ordinary skill in the art will appreciate that all or part of step in the whole bag of tricks of above-described embodiment is to come the relevant hardware of instruction finish by program, this program can be stored in the computer-readable recording medium, and storage medium can comprise: ROM, RAM, disk or CD etc.
More than multi-domain intercommunicating media address distribution method that the embodiment of the invention is provided and system and device be described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims (11)

1. a multi-domain intercommunicating method is characterized in that, comprising:
Receive user's request;
Analyze the caller of described user's acquisition request to called media direction and called domain identifier;
Send described caller to called media direction and described called domain identifier;
The message of called media address is carried in reception;
Media address in described user's request is revised as described called media address, transmits described amended user and ask called;
Receive the called message of returning;
Analyze described message and obtain the media direction that is called into caller and the domain identifier of caller;
Send the described media direction of caller and the domain identifier of described caller of being called into.
2. multi-domain intercommunicating method according to claim 1 is characterized in that, analyzes the caller of described user's acquisition request and comprises to called media direction:
Described user request is analyzed, obtained caller and belong to external domain or interior fields, called external domain or the interior fields of belonging to, according to caller and called external domain or the interior fields of belonging to, obtain caller to called media direction.
3. multi-domain intercommunicating method according to claim 2 is characterized in that, the Uniform Resource Identifier URI in the call request is analyzed, and obtains described called external domain or the interior fields of belonging to,
When described URI is SIP URI, obtain the IP address according to described URI, obtain called external domain or the interior fields of belonging to according to described IP address search allocation list;
When described URI is TEL URI, according to number section inquiry IP address, obtain called external domain or the interior fields of belonging to according to described IP address search allocation list.
4. arbitrary described multi-domain intercommunicating method is characterized in that according to claim 1-3, and described method also comprises the domain identifier of analyzing the caller of described user's acquisition request.
5. a multi-domain intercommunicating system is characterized in that, comprising:
The Interconnection Border Control Function entity is used for receiving user's request, analyzes the caller of described user's acquisition request to called media direction and called domain identifier, sends described caller to called media direction and called domain identifier; The message of called media address is carried in reception, and media address in described user's request is revised as described called media address, transmits described amended user and asks called; Receive the called message of returning, analyze described message and obtain the media direction that is called into caller and the domain identifier of caller, send the described media direction of caller and the domain identifier of described caller of being called into;
The gateway function entity, be used for receiving caller to called media direction and called domain identifier, specify called media address according to described caller to called media direction and called domain identifier, send to described Interconnection Border Control Function entity by the policy deciding functional entity based on service and carry the resource authorization response message of called media address; Receive described Interconnection Border Control Function entity by the described increase terminal message that sends based on the policy deciding functional entity of service, described increase terminal message carries the described media direction of caller and the domain identifier of described caller of being called into.
6. multi-domain intercommunicating according to claim 5 system is characterized in that the caller of the described user's acquisition request of described Interconnection Border Control Function entity analysis comprises to called media direction:
Described user request is analyzed, obtained caller and belong to external domain or interior fields, called external domain or the interior fields of belonging to, according to caller and called external domain or the interior fields of belonging to, obtain caller to called media direction.
7. multi-domain intercommunicating according to claim 5 system, it is characterized in that, described system also comprises policy deciding functional entity, be used for receiving that described Interconnection Border Control Function entity sends carries described caller to the request of called media direction and called domain identifier, and send described caller to called media direction and called domain identifier to described gateway function entity.
8. multi-domain intercommunicating according to claim 7 system is characterized in that described policy deciding functional entity is used for:
What receive that described Interconnection Border Control Function entity sends carries described caller to the request of called media direction and described called domain identifier, described request is carried out the local policy inspection, then send increase terminal message ADD Termination to described gateway function entity if meet local policy, described increase terminal message ADD Termination carries caller to called media direction and called domain identifier.
9. an Interconnection Border Control Function entity is characterized in that, comprising:
Receiving element is used for receiving user's request;
Analytic unit is used for analyzing the caller of described user's acquisition request to called media direction and called domain identifier;
Transmitting element is used for sending described caller to called media direction and described called domain identifier;
Described Interconnection Border Control Function entity also is used for receiving the message of carrying called media address;
Described Interconnection Border Control Function entity also is used for described user's request media address is revised as described called media address, transmits described amended user and asks called;
Described receiving element also is used for receiving the called message of returning;
Described analytic unit also is used for analyzing described message and obtains the media direction that is called into caller and the domain identifier of caller;
Described transmitting element also is used for sending the described media direction of caller and the domain identifier of described caller of being called into.
10. Interconnection Border Control Function entity according to claim 9 is characterized in that, described analytic unit is analyzed described user's acquisition request media direction and comprised:
Analytic unit is analyzed described user request, obtains caller and belongs to external domain or interior fields, called external domain or the interior fields of belonging to, and according to caller and called external domain or the interior fields of belonging to, obtains caller to called media direction.
11. a gateway function entity is characterized in that, comprising:
Receiving element is used for receiving caller to called media direction and called domain identifier;
Designating unit is used for specifying called media address according to described caller to called media direction and described called domain identifier;
Transmitting element is for the called media address that sends described appointment; Described gateway function entity also be used for to receive the increase terminal message that the Interconnection Border Control Function entity sends by the policy deciding functional entity based on service, and described increase terminal message carries the media direction that is called into caller and the domain identifier of caller.
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