CN101159744A - Inter-network interconnection protocol network intercommunicating method of different version - Google Patents
Inter-network interconnection protocol network intercommunicating method of different version Download PDFInfo
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Abstract
The invention relates to the intercommunication of IP networks of different versions, disclosing a method for achieving intercommunication of interconnected protocol networks of different versions to reduce the unnecessary conversion and ALG/NAT-PT treatment, reduce the pressure of ALG/NAT-PT equipment and achieving better intercommunication effect among IP networks of different versions. The method for achieving intercommunication among IP networks of different versions carries out conversion or uses ALG/NAT-PT function only under the condition that the communication can not be continued unless carrying out IP version conversion when the IP version of the current node is different from that of the next jump node. Specifically, the method comprises inquiring whether the IP version of the next jump node is consistent with that of the current node, and directly transmitting information direction if so, or else, transmitting the information after IP version conversion. The consistency inquiry of the IP version can be carried out according to the local configuration information or DNS.
Description
Technical field
The present invention relates to the intercommunication of different editions IP network, the intercommunication of the IP network of particularly relevant different editions with internet protocol multimedia core network subsystem system (IMS).
Background technology
Mobile communication system can satisfy the requirement that people communicate whenever and wherever possible, has just obtained development rapidly after it occurs.Along with 3G (Third Generation) Moblie (The Third Generation, be called for short " 3G ") proposition of technology and further developing, mobile network's bandwidth increases greatly, mobile communication will not only be confined to traditional voice communication, will carry out gradually in conjunction with the multimedia service of multiple medium types such as audio frequency, video, picture and text.Mobile communication with present business (presence), short message, web page browsing, locating information, push professional (PUSH), the combination of data services such as file-sharing, can provide more service selection for the user, the for example instant message of messaging service class and chatroom, multimedia short message, the amusement of video traffic class, multimedia messages, daily interchange, the catalogue of ecommerce class, search engine, shopping cart, order management, payment, the solitaire game of game class, group's recreation, the missing of positioning service class, guide, report to the police, the address book of personal assistant class, schedule, the bookmark management, file storage, event notification, Email can better meet user's multiple demand.
Consider internetworking agreement (Internet Protocol, abbreviation " IP ") application of network more and more widely, third generation partner program (3rd Generation Partnership Project, be called for short " 3GPP ") and third generation partner program 2 (3rd Generation Partnership Project 2, be called for short " 3GPP2 ") etc. normal structure all formulated mobile communications network to full grouping, the standard of the direction evolution of all-IP, IP-based IP multimedia subsystem, IMS framework has been proposed, purpose is to use a kind of structure of standardized opening to realize diversified multimedia application in the mobile network, offers more selection of user and abundanter impression.
Wherein, 3GPP has introduced IP Multimedia System (IP Multimedia Subsystem is called for short " IMS ") territory in version 5 (Release 5, are called for short " the R5 ") stage, is superimposed upon on the packet field network.IMS is by CSCF (Call Session Control Function, abbreviation " CSCF "), MGCF (Media Gateway Control Function, abbreviation " MGCF "), media resource function (Multimedia Resource Function, be called for short " MRF ") and home signature user server functional entity compositions such as (Home Subscriber Server are called for short " HSS ").CSCF can be divided into serving CSCF (Serving CSCF is called for short " S-CSCF "), proxy CSCF (Proxy CSCF is called for short " P-CSCF ") and three logic entities of inquiry CSCF (Interrogating CSCF is called for short " I-CSCF ") again.Wherein, S-CSCF is the service switching center of IMS, carries out session control, and peace preservation association's speech phase is in charge of user profile, produces charge information etc.; P-CSCF is the access point of terminal user access to IMS, finishes user's registration, is responsible for QoS control and safety management etc.; I-CSCF is responsible for the intercommunication between the IMS territory, and network topology and configuration are externally hidden in the distribution of management S-CSCF, produce metering data etc.The MGCF control gateway realizes the intercommunication of IMS network and other network, and MRF provides media resource, as the folding and unfolding sound, and encoding and decoding and multimedia conferencing bridge.HSS is a customer data base, storage IMS user's subscription data and configuration information etc.
Because it is irrelevant that the structure of IMS network has been accomplished with the bottom bearer network, therefore the IMS network of 3GPP definition also can be applied on other packet networks outside the packet field network of 3GPP definition, such as the packet network that defines among the 3GPP2, WLAN (wireless local area network) (Wireless Local Area Network, be called for short " WLAN "), and next generation network (Next Generation Network, be called for short " NGN ") etc., realized using the independence and and the independence of access network type of terminal type with the user.Here do not limit IMS and only be applied in relevant network of 3GPP and the application, the access network of other types and the business of bearer network and application also can realize with the IMS framework.
In IMS, use the signaling control protocol of conversation initialized protocol (Session Initiation Protocol is called for short " SIP ") as IP multimedia session.Wherein, Session Initiation Protocol is the IP phone signaling protocol that is proposed by the Internet engineering duty group (Internet Engineering Task Force is called for short " IETF ").As what its name implied, SIP is used for initiation session, it can control the foundation and the termination of the Multimedia session of a plurality of participants' participation, and can dynamically adjust and revise session attribute, as session bandwidth require, the code/decode format of the medium type (voice, video and text etc.) of transmission, medium, to the support of multicast and clean culture etc.
3GPP is when formulating the IMS related specifications, consider the 4th edition (InternetProtocol version 4 of internetworking agreement, abbreviation " IPv4 ") there are problems such as address space is about to exhaust, routing table explosion, and the extensive use of IMS requires a large amount of available IP addresses, in realizing the next generation network that multiple medium type merges, safety, quality and the mobility of network are all had higher requirement, therefore, when 3GPP clearly stipulated to realize IP multimedia service, user terminal must support to use the IPv6 address to carry out communication.For the mobile network feature entity, the all functions entity of IMS, comprise subscriber equipment (UserEquipment, be called for short " UE "), CSCF, MGCF, MRF and application server (ApplicationServer, be called for short " AS ") all must support IPv6, gateway GPRS supporting node (GGSN) (GPRSGateway Support Node, be called for short " GGSN ") with IMS interface is arranged, also must support the 6th edition (Internet Protocol version 6 of internetworking agreement, be called for short " IPv6 "), for supporting dynamic address resolution, GGSN also need support the DHCP (Dynamic HostConfiguration Protocol is called for short " DHCP ") of IPv6.
But along with the variation in market and the development of technology, the commercial speed that does not reach original expectation at present of IPv6 scale, lack all supports simultaneously and will make IMS application delay based on IPv6 based on the IPv6 product, mobile operator is for by providing abundanter multimedia service to 3G subscription, promote Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiple Access, abbreviation " WCDMA ") IMS's is commercial as early as possible, attract more user, promote the development of 3G network, advise to 3GPP, consider in the realization of IMS, to support that IPv4 satisfies early stage commercial demand.Simultaneously, the another kind of mainstream system CDMA 2000 of 3G (Code Division Multiple Access 2000, abbreviation " CDMA2000 ") multimedia domain, MMD (the Multimedia Domain that the 3GPP2 of standardization body formulates, be called for short " MMD ") can realize based on IPv4 or IPv6, and Internet is last existing much based on the commercial sip terminal of IPv4, and this will cause the IMS and outside intercommunication problem based on IPv4 network of 3GPP based on IPv6.Therefore, to increase support in the 3GPP decision IMS product in the early stage to IPv4, make IMS support IPv6 and/or IPv4 simultaneously, 3GPP just needs to study the IMS that how to introduce based on IPv4 like this, and based on the problems such as intercommunication between the intercommunication between IPv4 and the IPv6 IMS and roaming, IMS and the IPv4 SIP application.
3GPP technical report (Technical Report, abbreviation " TR ") 23.98 1 pairs of various intercommunication problems that may exist are analyzed, comprise: the IP version type that UE supports, the IP version type of IMS network support, the IP version type that GPRS network is supported, consider the situation of roaming, intercommunication scene end to end relates to professional IP version intercommunication etc.Realize the place use network address translation and protocol conversion (the Network Address Translation and ProtocolTranslation of IP version intercommunication at needs, be called for short " NAT-PT ") and ALG (Application Layer Gateway, be called for short " ALG ") function, wherein, the NAT-PT function is used to realize network address transmission and protocol conversion, and the ALG function is used to realize the address mapping that application layer is relevant.
Because use NAT-PT and ALG function just to mean the time delay that increases session at every turn, reduced service quality, this number of times that just means the IP address transition is few more, quality of service impacts to session is more little, and then alleviated pressure to the equipment of realizing NAT-PT and ALG function, reduced the number of network bottleneck, therefore when IPv4 and IPv6 intercommunication, just needed to consider to introduce NAT-PT and ALG function when, can be so that realize that the conversion times of process in the intercommunication process end to end is minimum.
The scheme of IPv4 and IPv6 intercommunication is proposed by 3GPP among the existing solution IMS.In the prior art scheme, UE only supports the IPv4 protocol stack, only supports the IPv6 protocol stack, perhaps supports the two stacks of IPv4 and IPv6 simultaneously; Equally, other functional entitys that relate in session is set up all may be only to support IPv4 as opposite end UE, AS, CSCF, GGSN etc., only support IPv6, perhaps support two stacks simultaneously.
The trend of considering IMS network development from now on is all to use the IPv6 address, simultaneously because the anxiety of existing IPv4 address space, a lot of operators use private network IP address, when causing carrying out intercommunication with other IP territory networks must be public network IP address with private network IPv4 address spaces, therefore, the prior art scheme proposals uses the IPv6 address as far as possible, can reduce the situation of using the ALG/NAT-PT function like this, thereby improves the service quality of session.
In relating to professional IP version intercommunication, the scheme of carrying out instant messaging between IPv4 UE of realization of 3GPP suggestion and the IPv6 UE as shown in Figure 1.
Wherein UE A supports IPv4, transmitting instant message in the UE B, does not relate to the negotiation of medium composition, directly uses the SIP signaling to carry relevant information, and UE B supports Pv6, and its home network is different with UE A.In initiator's one side, the ownership S-CSCF of UE A supports two stacks, and the sip message of being responsible for using IPv4 to transmit is converted into the sip message that uses IPv6 to transmit, and continues to send to recipient UE B then.
In the time of the UE initiation session in the IMS network, the processing procedure in the existing intercommunication scheme as shown in Figure 2.
Wherein, IMS-ALG refers to the ALG functional entity in the IMS network, and TrGW is network address translation-protocol conversion (Network Address Translator-ProtocolTranslator is called for short " the NAT-PT ") functional entity in the IMS network.Description according to Fig. 2, session initiator UEA supports IPv6, the ownership S-CSCF at its place is by DNS (Domain Name System, being called for short " DNS ") mechanism judgement recipient such as inquiry can't communicate by IPv6, then by and IMS-ALG and TrGW mutual, replace the relevant information of IPv6 version in the sip message, use IPv4 and user side B to continue the session negotiation process then, set up the media delivery path.
As can be seen, the scheme of intercommunication has been determined the IP version that communicating pair UE supports earlier between the existing different IP version, be that the initiator uses IPv4, the recipient uses IPv6, then according to this prerequisite, in the place that can use the ALG/NAT-PT function the earliest, promptly support the initiator UE ownership S-CSCF place of two stacks, the mapping of execution IP version relevant information.Those of ordinary skill in the art are appreciated that existing technical scheme preferentially uses IPv6, promptly as long as next functional entity can be supported IPv6, just carry out the conversion of IPv4 to IPv6.
In actual applications, there is following problem in such scheme: existing technical scheme is considered not comprehensive to the situation of different IP version intercommunication among the IMS, and when the intercommunication of different IP version, may need to finish unnecessary version conversion, increase the pressure of realizing the equipment of ALG/NAT-PT, influenced the service quality of session.
Cause the main cause of this situation to be, at first, existing technical scheme thinks that the initiator uses IPv4, the recipient uses IPv6, and actual conditions are really not so, early stage commercial IMS only supports IPv4 owing to the poor availability of professional restriction and IPv6 equipment probably, the IMS network of Shi Xianing is then for the consideration of forward compatibility and backward compatibility after a while, can support two stacks simultaneously, when technology more stable, when market is more ripe, may only realize the IMS network of IPv6, so this IMS network of three types needs all in the IP version intercommunication to consider, especially IMS network initial stage of using, also need to consider and existing in a large number IPv4 network and business between intercommunication, otherwise may have the conversion between a large amount of avoidable IP versions, such as only supporting IPv4 when the caller home network, called home network is supported two stacks, and calling UE and called UE can not carried out the address information conversion of IPv4 to IPv6 when all being to use the IPv4 address fully in the caller home network.
Secondly, in the time of actual the realization, caller ownership S-CSCF can't know the IP address class type that purpose UE uses in advance, can only know the address style in the IP territory at purpose UE home network place, when purpose UE has roamed in another network, in the time of by roaming network distributing IP address, the IP version that this UE uses has only its ownership S-CSCF to know, according to prior art, after the mapping of IP version relevant information is carried out in the place that can use ALG/NAT-PT the earliest, after the home network that arrives purpose UE, need to carry out new ALG/NAT-PT conversion probably, such as, when the caller home network is only supported IPv4, and called home network is supported two stacks, and calling UE and called UE all be to use the IPv4 address, and in fact these conversions can not carried out fully, have caused the conversion between the unnecessary IP version.
Summary of the invention
In view of this, main purpose of the present invention is to provide the method for the different inter-network interconnection protocol network intercommunicating of a kind of version, when making application IMS, having reduced unnecessary conversion and ALG/NAT-PT handles, alleviated the pressure of ALG/NAT-PT equipment, made the intercommunication better effects if of the different IP network of version.
For achieving the above object, the invention provides the method for the different inter-network interconnection protocol network intercommunicating of a kind of version, comprise following steps:
The home calling State Control function device of C calling subscriber equipment judges whether the home network of called subscriber equipment supports the internetworking protocol version of described calling subscriber equipment, if then will directly be transmitted to the home calling State Control function device of described called subscriber equipment, otherwise this message is carried out being transmitted to after the internetworking protocol version conversion home calling State Control function device of described called subscriber equipment from the message of described calling subscriber equipment;
The home calling State Control function device of the described called subscriber equipment of D responds described message, judge whether described called subscriber equipment supports the internetworking protocol version of described message, if then described message directly is transmitted to described called subscriber equipment, otherwise described message is carried out send to described called subscriber equipment after the conversion of internetworking protocol version.
Wherein, described method also comprised following steps before step C:
Whether the internetworking protocol address that the home calling State Control function device of the described calling subscriber equipment of A is judged initiation session and sent the calling subscriber equipment of message is privately owned address, if then enter step B, otherwise enters step C;
B judges whether called subscriber equipment is in the same home network with described calling subscriber equipment, if then directly communicate, otherwise the application network address-translating device is converted to the laggard step C of going in publicly-owned address with described privately owned address.
Among the described step C, the home calling State Control function device of described caller obtains the internetworking protocol version type that described called home network is supported by inquiring about local configuration or DNS.
Among described step C and the D, the step that described CSCF equipment carries out the conversion of internetworking protocol version to described message also further comprises following substep:
Described CSCF equipment is judged media description in the described session, if described session has media description, then use application layer gateway equipment and network address translation and protocol conversion device to realize the conversion of internetworking protocol version information, if described session does not have media description, then directly in described CSCF equipment, realize the conversion of internetworking protocol version information.
Described CSCF equipment carries the next hop address that is used for the subsequent message route when transmitting message to described application layer gateway equipment.
Can adopt the H.248 message or the MGCP communication of expansion between described application layer gateway equipment and network address translation and the protocol conversion device.
Described message can be conversation initialization protocol message.
By relatively finding, technical scheme difference with the prior art of the present invention is, the present invention is only inconsistent at the IP version of this node and next-hop node, does not just change or use the ALG/NAT-PT function if do not carry out under the situation that IP version conversion just can't continue to communicate by letter.That is to say that the ALG/NAT-PT conversion is placed on callee side as much as possible to be finished.Specifically, whether the IP version of inquiry next-hop node is consistent with this node earlier, if then directly send information, otherwise through sending information again after the IP version conversion.The consistency inquiry that can carry out IP version according to the configuration information or the DNS of this locality.
Difference on this technical scheme, brought comparatively significantly beneficial effect, promptly at first, because the present invention program transmits according to the IP version of caller as far as possible, only just change in the time of just can't continuing to communicate by letter not carrying out IP version conversion, therefore can avoid the conversion of many unnecessary IP versions, reduced the access times of ALG/NAT-PT in the session, therefore can reduce the time delay of session transmissions, improve service quality.
The second, because the access times of ALG/NAT-PT can significantly reduce, therefore reduced the burden of ALG/NAT-PT equipment in the system, improved the performance of system.
The 3rd; pay the utmost attention to the scheme that adopts the IPv6 transmission in the prior art because the present invention program is different from, IPv4 and IPv6 are put on an equal footing, therefore compatible performance is better; each stage that the network provider uses can be applied in, the investment of operator can be protected to greatest extent.
Description of drawings
Fig. 1 is the scheme of carrying out instant messaging between the IPv4 UE of realization of 3GPP suggestion and the IPv6 UE;
Fig. 2 is in the time of the UE initiation session in the IMS network, the processing procedure in the existing intercommunication scheme;
Fig. 3 is a flow process of setting up the different IP network intercommunication of the version of process according to the session that has media negotiation of a preferred embodiment of the present invention;
Fig. 4 is the message conveying flow between each functional entity in the flow process of setting up according to the session that has media negotiation end to end of a preferred embodiment of the present invention;
Fig. 5 is the transmission schematic diagram according to message in the method for carrying out instant messaging between IPv4 UE of realization of a preferred embodiment of the present invention and the IPv6 UE.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Basic principle of the present invention at first is described.In order to reduce the conversion between the unnecessary IP version, the present invention program is placed on callee side as much as possible with the ALG/NAT-PT conversion and finishes, unless the functional entity of Calling Side processing session does not carry out the ALG/NAT-PT conversion and just can't continue follow-up communication, otherwise does not just carry out the ALG/NAT-PT conversion.Can reduce unnecessary ALG/NAT-PT conversion as much as possible like this, make the scheme of the different IP network intercommunication of version optimize the better effects if of intercommunication more.
The present invention is elaborated the present invention program in order better to illustrate below in conjunction with accompanying drawing.
What need explanation in advance is, the present invention program runs angle consideration easily from the IMS Virtual network operator, think each IMS functional entity that is arranged in same IMS network, be that P-CSCF, I-CSCF are identical with the IP version that S-CSCF is supported, otherwise, IMS operator oneself also will consider to net the multiple intercommunication scene that may exist between the interior difference in functionality entity, has increased the complexity of the network planning for no reason.
The flow process of setting up the different IP network intercommunication of the version of process according to the session that has media negotiation of a preferred embodiment of the present invention as shown in Figure 3.
At first enter step 100, caller makes a call.Wherein, caller can adopt sip message to make a call.
Then enter step 110, the ownership S-CSCF of caller judges whether the IP address of caller is private IP address, if then enter step 120, otherwise enters step 140.Because the anxiety of IPv4 address, a lot of websites have all adopted private network IPv4 address on the existing IPv4 network, when needs insert public network, carry out the mapping of private net address and public network address at the edge of private network and public network.
In step 120, the ownership S-CSCF of caller judges that whether called home network is identical with the home network of caller, if then enter step 170, otherwise enters step 130.In this step, if the home network of called home network and caller is identical, illustrate that then caller is in the identical private network simultaneously with called, IP version is also identical.
In step 130, the ownership S-CSCF of caller uses NAT that the private IP address of caller is mapped to public network IP address, then enters step 140.Wherein, private IP address is conventionally known to one of skill in the art to the mapping method of public network IP address, does not describe in detail at this.
In step 140, the ownership S-CSCF of caller judges whether called home network supports the IP version of caller, if then enter step 160, otherwise enters step 150.The ownership S-CSCF of caller can obtain the IP version of called home network by the method for inquiry or configuration.For example, when the ownership S-CSCF of caller obtain be called home network domain name the time, can send query requests to DNS according to the current IP version that oneself uses, need to prove, what inquiry obtained here only is the address of the I-CSCF of called UE place network external interface, but be based on consideration above, think that the address style of I-CSCF can represent the IP address class type of its place IMS network.According to the address style that dns server returns, the ownership S-CSCF of caller can determine whether and can directly communicate by letter with the opposite end without the ALG/NAT-PT conversion.In a preferred embodiment of the present invention, the current IPv4 message of receiving of the ownership S-CSCF of caller, then whether the ownership S-CSCF of caller has corresponding IPv4 address according to called home network domain name inquiry earlier, if dns server has returned the address of IPv4 type, called home network support IPv4 is described or supports two stacks, otherwise dns server can only return corresponding IPv6 address.Those of ordinary skill in the art are appreciated that, except the inquiry dns server, can also be directly the IP version type information of called address or home network domain name and its place home network support be configured among S-CSCF or the I-CSCF, also can determine whether can direct and called place home network external interface I-CSCF communicate by letter.
In step 150, send after the conversion of the ownership S-CSCF of caller use ALG/NAT-PT execution IP version information, then enter step 180.In a preferred embodiment of the present invention, the ALG functional entity that the ownership S-CSCF of caller is forwarded to the caller home network with sip message is carried out the IP address version information translation of application layer, and ALG control NAT-PT carries out user's face IP address version information translation.Wherein, can use H.248 agreement or MECAGO agreement to communicate between ALG and the NAT-PT.Need to prove that the ownership S-CSCF of caller is used for the subsequent message route transmitting the address of carrying next jumping when message is given the ALG functional entity simultaneously.
In step 160, the ownership S-CSCF of caller directly sends to message called ownership S-CSCF/I-CSCF, then enters step 180.In this step, called home network is supported the IP version of caller, and the conversion that does not need to carry out IP version also can direct communication, therefore is placed on the principle that callee side is finished based on changing as far as possible, and the ownership S-CSCF of caller directly sends message.
In step 170, the ownership S-CSCF of caller does not carry out the IP version conversion and directly handles the whole flow process of back end.In this step, caller is identical with called home network, does not need to carry out the IP version conversion and gets final product direct communication, and relevant processing method and prior art are identical, do not describe in detail at this.
In step 180, called ownership S-CSCF judges the called IP version of whether supporting caller, if then enter step 210, otherwise enters step 190.Wherein, called IP version is kept at this locality, can directly inquire about and learn.
In step 190, called ownership S-CSCF sends a message to the ALG functional entity and carries out the conversion of application layer IP version.Wherein, the ALG functional entity in this step is the ALG functional entity in the called home network, and called ownership S-CSCF is used for the subsequent message route transmitting the address of carrying next jumping when message is given the ALG functional entity simultaneously.
Then enter step 200, ALG control NAT-PT carries out the conversion of user's face IP version.Wherein, can use H.248 agreement or MeGaCo agreement to communicate between ALG and the NAT-PT.
Then enter step 210, forwards is given the P-CSCF of called correspondence.Those of ordinary skill in the art are appreciated that the IP version of P-CSCF of called correspondence is identical with called IP version.
Then enter step 220, called P-CSCF sends to message called.Wherein, the IP version of message can be supported by called in this step.
So far, finish the flow process of setting up of a session that has media negotiation end to end.
The technical staff in field of the present invention is appreciated that, when carrying out private IP address in the step 130 to carry out the equipment of ALG/ANT-PT function in the NAT device of public ip address conversion and step 150 be different equipment, realize according to above-mentioned flow process so, otherwise the private IP address of carrying out in the step 130 can realize with the conversion of execution ALG/NAT-PT in the step 150 together to the conversion of public ip address.
According to above-mentioned flow process, the session that has media negotiation end to end of a preferred embodiment of the present invention set up in the flow process message conveying flow between each functional entity as shown in Figure 4.The message conveying flow of this preferred embodiment shown in Figure 4 is more clearly, and those of ordinary skill in the art is readily appreciated that with reference to the explanation of Fig. 3.
For being described as follows of the message conveying flow of Fig. 4:
At first, UE1 initiates an IMS conversation request and gives UE2, and this message is to use IPv4 to transmit;
Then, P-CSCF1 transmits the home network S-CSCF1/I-CSCF1 that this conversation request message is given UE1;
Then, S-CSCF1/I-CSCF1 can support the IPv4 version that current S-CSCF1 uses according to DNS inquiry or the definite UE2 place of local configuration home network, and therefore decision continues the S-CSCF2/I-CSCF2 that this conversation request message of forwarding is given UE2 place home network;
Then, S-CSCF2/I-CSCF2 compares according to the IP address class type that the IP address of the UE2 that preserves and the request message received use, and finds inconsistently, must use the ALG/NAT-PT function to change, then this forwards is arrived ALG, the address of carrying P-CSCF2 simultaneously;
Then, ALG carries out the conversion of IP address version relevant information from IPv4 to IPv6, because relate to modification to user's face, therefore, H.248 the message of use expansion or MGCP (Media Gataway Control Protocal is called for short " MEGACO ") and NAT-PT equipment are mutual;
After mutual the end, ALG sends to the P-CSCF2 of the current place of UE2 network with the conversation request message of neotectonics, and this message uses IPv6 to transmit, and media description is modified;
Then, P-CSCF2 transmits this conversation request message and gives UE2;
At last, follow-up Signalling exchange will carry out between UE1, S-CSCF2/I-CSCF2, ALG and UE2, and promptly the session signaling path among Fig. 4 is set up; Follow-up medium will carry out between UE1, NAT-PT and UE2 alternately, and promptly the media path among Fig. 4 is set up.
Need to prove, to have only the SIP signaling not have media negotiation exactly, at this moment, just need ALG to carry out the information such as IP address of IP address information mapping such as instant message if a kind of IP version intercommunication scene that relates to business does not need media negotiation.In this case, the principle of different IP version intercommunication is identical with the principle of above-mentioned flow process, because message is shorter, does not therefore need Media Stream, just finish of the mapping of an IP version, do not need to use the ALG/NAT-PT function to another IP version by called ownership S-CSCF.In message intercommunication, the IP version of next jumping can obtain by inquiring about local setting or DNS equally.
According to the transmission schematic diagram of message in the method for carrying out instant messaging between the IPv4 UE of realization of a preferred embodiment of the present invention and the IPv6 UE as shown in Figure 5.
Wherein UE A transmitting instant message in the UE B, does not relate to the negotiation of medium composition, directly uses the SIP signaling to carry relevant information, and the home network of UE B is different with UE A.In callee's one side, the ownership S-CSCF of UE B supports two stacks, and the sip message of being responsible for using IPv4 to transmit is converted into the sip message that uses IPv6 to transmit, and continues to send to recipient UE B then.
Those of ordinary skill in the art as can be seen, the present invention is by judging the IP address class type of caller and called support or the IP version of home network support at the S-CSCF place, only under the inconsistent situation of both sides' version, just use the ALG/NAT-PT function, otherwise just be placed on last S-CSCF of end-to-end flow process, be that the terminating S-CSCF place uses ALG/NAT-PT or only is the mapping of carrying out IP version, thereby can farthest reduce access times the ALG/NAT-PT function; In addition, this method is put on an equal footing IPv4 and IPv6, at the initial stage that IMS uses, because use the message of IPv4 more, therefore, result according to each inquiry DNS or configuration, to use IPv4 to transmit as far as possible, wait until when the later stage uses IPv6 to become main flow, and use this method will use IPv6 to transmit message in a large number, therefore compatibility is good, can be applied in each stage of IMS commercialization.
Though by reference some preferred embodiment of the present invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that, can do various changes to it in the form and details, and the spirit and scope of the present invention that do not depart from appended claims and limited.
Claims (7)
1. the method for the different inter-network interconnection protocol network intercommunicating of a version is characterized in that, comprises following steps:
The home calling State Control function device of C calling subscriber equipment judges whether the home network of called subscriber equipment supports the internetworking protocol version of described calling subscriber equipment, if then will directly be transmitted to the home calling State Control function device of described called subscriber equipment, otherwise this message is carried out being transmitted to after the internetworking protocol version conversion home calling State Control function device of described called subscriber equipment from the message of described calling subscriber equipment;
The home calling State Control function device of the described called subscriber equipment of D responds described message, judge whether described called subscriber equipment supports the internetworking protocol version of described message, if then described message directly is transmitted to described called subscriber equipment, otherwise described message is carried out send to described called subscriber equipment after the conversion of internetworking protocol version.
2. the method for the inter-network interconnection protocol network intercommunicating that version according to claim 1 is different is characterized in that, described method also comprised following steps before step C:
Whether the internetworking protocol address that the home calling State Control function device of the described calling subscriber equipment of A is judged initiation session and sent the calling subscriber equipment of message is privately owned address, if then enter step B, otherwise enters step C;
B judges whether called subscriber equipment is in the same home network with described calling subscriber equipment, if then directly communicate, otherwise application network address transition and protocol conversion device are converted to the laggard step C of going in publicly-owned address with described privately owned address.
3. the method for the inter-network interconnection protocol network intercommunicating that version according to claim 1 is different, it is characterized in that, among the described step C, the home calling State Control function device of described caller obtains the internetworking protocol version type that described called home network is supported by inquiring about local configuration or DNS.
4. the method for the inter-network interconnection protocol network intercommunicating that version according to claim 1 is different, it is characterized in that, among described step C and the D, the step that described CSCF equipment carries out the conversion of internetworking protocol version to described message also further comprises following substep:
Described CSCF equipment judges whether media description is arranged in the described session, if described session has media description, then use application layer gateway equipment and network address translation and protocol conversion device to realize the conversion of internetworking protocol version information, if described session does not have media description, then directly in described CSCF equipment, realize the conversion of internetworking protocol version information.
5. the method for the inter-network interconnection protocol network intercommunicating that version according to claim 4 is different is characterized in that, described CSCF equipment carries the next hop address that is used for the subsequent message route when transmitting message to described application layer gateway equipment.
6. the method for the inter-network interconnection protocol network intercommunicating that version according to claim 1 is different, it is characterized in that, can adopt the H.248 message or the MGCP message communicating of expansion between described application layer gateway equipment and described network address translation and the protocol conversion device.
7. the method for the inter-network interconnection protocol network intercommunicating that version according to claim 1 is different is characterized in that, described message can be conversation initialization protocol message.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101945362A (en) * | 2010-09-20 | 2011-01-12 | 华为技术有限公司 | Network message processing method, device and communication system |
| CN101764813B (en) * | 2009-12-16 | 2012-11-07 | 华为技术有限公司 | IMS network communication method and device |
| CN105075213A (en) * | 2013-12-11 | 2015-11-18 | 华为技术有限公司 | Internet protocol address allocation method and device |
| CN112887452A (en) * | 2021-03-26 | 2021-06-01 | 中星科源(北京)信息技术有限公司 | Communication method and system between local area networks and NAT gateway |
| WO2024174436A1 (en) * | 2023-02-24 | 2024-08-29 | 通号通信信息集团有限公司 | Method for implementing interconnection and interworking, electronic device, and computer-readable medium |
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- 2004-10-05 CN CNA2007101677052A patent/CN101159744A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101764813B (en) * | 2009-12-16 | 2012-11-07 | 华为技术有限公司 | IMS network communication method and device |
| CN101945362A (en) * | 2010-09-20 | 2011-01-12 | 华为技术有限公司 | Network message processing method, device and communication system |
| WO2011147332A1 (en) * | 2010-09-20 | 2011-12-01 | 华为技术有限公司 | Method, apparatus and communication system for processing network messages |
| CN105075213A (en) * | 2013-12-11 | 2015-11-18 | 华为技术有限公司 | Internet protocol address allocation method and device |
| CN105075213B (en) * | 2013-12-11 | 2019-04-19 | 华为技术有限公司 | Internet protocol address distribution method and device |
| CN112887452A (en) * | 2021-03-26 | 2021-06-01 | 中星科源(北京)信息技术有限公司 | Communication method and system between local area networks and NAT gateway |
| CN112887452B (en) * | 2021-03-26 | 2022-11-04 | 中星科源(北京)信息技术有限公司 | Communication method and system between local area networks and NAT gateway |
| WO2024174436A1 (en) * | 2023-02-24 | 2024-08-29 | 通号通信信息集团有限公司 | Method for implementing interconnection and interworking, electronic device, and computer-readable medium |
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