CN101156401A - Bridging connection system and method for IP multimedia subsystem - Google Patents
Bridging connection system and method for IP multimedia subsystem Download PDFInfo
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Abstract
A bridging system in the IP multimedia subsystem comprises an Interrogating Call Session Control Function (I-CSCF, 2), a Breakout Gateway Control Function (BGCF, 4), a Serving Call Session Control Function (S-CSCF, 2) and a Media Gateway Control Function (MGCF, 6). Further a bridging method in the IP multimedia subsystem comprises the following steps: user terminal communicates with the other user terminals according to the routing rule of the I-CSCF (2); standing by the routing rule, the I-CSCF (2) performs the routing according to the network which the calling or called user belongs to. In the network according to this invention, the MGCF (6) and S-CSCF (1) could interconnect with the entity in the same network. Further, only the I-CSCF (2) (or via the Interconnecting Border Control Function unit (I-BCF, 5)) and the BGCF (4) could interconnect with the entity in the outer network, so the network is simplified and the unified management of the whole routing function is advantage to perform. Alternatively the IP routing is performed only via the Interconnecting Border Control Function unit (I-BCF, 5), so the security risk could be reduced from the topological concealing viewpoint.
Description
The present invention relates to a kind of communication technology for a kind of bridge system of IP multimedia subsystem and method and technology field, and in particular to bridge system and method in a kind of IP multimedia subsystem.Background technology
IMS (IP multimedia subsystem）It is 3GPP (third generation co-operative projects）The subsystem of the support IP multimedia service proposed in the versions of Release 5.It is used as NGN (next generation networks）, IMS core employs SIP (session initiation protocols）, and be unrelated with access technology.IMS can be advantageously used in supporting real-time user to user's mobile service, such as multi-media voice and visual telephone business.IMS can support user to the communication service of user by a series of mechanism.These mechanism include session negotiation and management, service quality（) and mobile management etc. QoS.Art is helped by IMS, operator can also release non real-time user to customer service（Such as chat and instant messaging）, multi-user service（Such as multimedia conferencing and chatroom）And server is to customer service（Such as dynamic pushing-type business and Click To Dial）Deng.
Because IMS core processing agreement employs SIP, so it can be PSTN (PSTNs）User, IMS user and other SIP networks（Non- IMS SIP network）User provides a unified core net processing platform.It is this using IMS domain as platform is uniformly processed, the technology for providing unified Call- Control1 for the user based on heterogeneous networks is referred to as IMS bridge joints（IMS Bridging ).As shown in figure 1, it can provide a kind of method of unified Call- Control1 technology for two two intercommunicatings between IMS user, PS1K user, other SIP networks user.
As shown in table 1, in the prior art, as current 3GPP has been defined for the situation of several IMS bridge joints.Entity is relatively more in IMS domain, and a call request can route the entity for having routing function in forwarded calls request, whole IMS domain by some entities in every kind of situation I-CSCF (query call session control modules）, S-CSCF (service call session control modules）, BGCF (egress gateways control modules）, MGCF (media gateway control modules）.
The defined IMS of table 1 bridges situation
Feelings caller is called shape
((((A runs (A operators to A to A operations CSCF to 1 IMS user services inquiry CSCF serving CSCFs IMS user for A operations）Operator）Business）Business）Business）
2 IMS user services inquiry CSCF serving CSCFs IMS user (CSCF (A (B operators of A suitable battalion）(B runs (B operators）Operator）Business）Business）
3 IMS user services BGCF (A this pass through MGCF (A run CSCF (A seek business）Business is used to PSTN）Operator）Family（A operators）
((by MGCF, (A runs CSCF, and (A seeks business to B to A fortune BGCF to 4 IMS user services BGCF）Operator）Business is used to PSTN）Operator）Family（B operators）
5 IMS user services other SIP nets (A operation CSCF (A network user business）Operator）
6 inquire about CSCF (A (A operations (A operation MGCF (the A operators of business CSCF IMS user users from PSTN）Business）Business）Operator）
(((A runs operator to A to 7 other SIP net inquiry K^- CSCF IMS user network users CSCF for A operations）Business）Business）As shown in table 1, the routing function of each entity in the prior art is described below：
• I-CSCF:With Incoming Routing, (network route）Function, the S-CSCF (situation 1,2,6,7) of the entity of forward always network.
• S-CSCF:With Outgoing Routing (go out networking by）Function, the entity of forward has situations below：
If it is IMS user that ■ is called, and called and S-CSCF belongs to same carrier network, then asks just to be transmitted to the I-CSCF (situation 1) of the carrier network.
If it is IMS user that ■ is called, and called and S-CSCF belongs to different operators network, then asks just to be transmitted to the I-CSCF (situation 2) of called carrier network.
If it is PSTN user that ■ is called, ask just to be transmitted to the BGCF (situation 3,4) of network.
If ■ opposite ends are to be forwarded directly to other SIP networks with some other SIP network user, request（Situation 5).
• BGCF:Only when it is PSTN user to be called, the entity just plays route.It can have
Having Incoming Routing, (network route）Function, and can have Outgoing Routing (go out networking by）Function, the entity of forward has situations below：
If ■ is called and BGCF belongs to same carrier network, ask just to be transmitted to the MGCF (situation 3) of the carrier network.
If Geld is called and BGCF belongs to different operators network, ask just to be transmitted to the BGCF (situation 4) of called carrier network.
• MGCF:Only when caller is PSTN user, the entity just plays route,
If it is IMS user that ■ is called, and the called and MGCF belongs to same carrier network, then asks just to be transmitted to network I-CSCF (situation 6).
In order to support some other possible bridge joint situation, be currently suggested increases ENUM (tElephone NUmber Mapping, telephone number mapping in MGCF）To strengthen MGCF routing function, so that with S-CSCF routing functions relatively, the I-CSCF and other SIP networks for MGCF is directly netted with BGCF, other operators are realized to be route MGCF（As shown in table 2）.
Table 2
As shown in table 2,
Situation 8 represents other SIP networks user calling PSTN user.
Situation 9 represents PSTN user call IMS user（Calling and called belong to different operators）.
Situation 10 represents PSTN user calling PSTN user（Calling and called belong to same operator）.
Situation 11 represents PST user calling PSTN user（Calling and called belong to different operators）.
Situation 12 represents that PSTN user calls other SIP networks user.
Fig. 2 is according to each inter-entity routing interface figure of situation 1-12.The part routed path for the scene accordingly numbered in numbering expression table 2 in figure.As can be seen from the figure：If according to existing bridge joint scheme, I-CSCF, S-CSCF, BGCF, MGCF can be with Home Networks（Same carrier network）And outer net（Other carrier networks）Some entities realize intercommunication.First, there is excessive intercommunication interface in IMS network, the routing management of whole network can be caused sufficiently complex.Secondly, the routing function of each entity excessively disperses, and is unfavorable for the unified management of whole routing function.Furthermore, BGCF, S-CSCF. I-CSCF and MGCF be required for outer net interconnecting, accordingly, it would be desirable to the topology information of these entities is exposed into Xi Bu circle, certain risk thus is come to the safety belt of network.The content of the invention
It is an object of the invention to provide a kind of bridge system of IP multimedia subsystem and method.Can cylinder whole network, the security of raising network.The invention discloses a kind of bridge system of IP multimedia subsystem, including query call session control module（I-CSCF), service call session control module (S-CSCF),
I-CSCF is used to judge whether calling and/or called belongs to same operator, or whether belongs to the user of PSTN networks, IMS network or other SIP networks, so as to>It is judged that the result of unit is transferred；
The egress gateways control module (BGCF) or I-CSCF that S-CSCF is netted for this operator net IMS user terminals with this operator are transferred.
Described I-CSCF also includes：
Whether judging unit, for judging whether calling and/or called belongs to same operator, or belong to the user of PSTHSi networks, IMS network or other SIP networks；
Adapter unit, is transferred for the result according to judging unit.
The invention also discloses a kind of bridge system of IP multimedia subsystem, including query call session control module（) and media network control module I-CSCF（MGCF ) ,
I-CSCF is used to judge whether calling and/or called belongs to same operator, or whether belongs to the user of PSTN networks, IMS network or other SIP networks, so that the result according to judging unit is transferred；
MGCF is used for this operator network users terminal and the I-CSCF of this operator net " is transferred between ^.
The bridge joint Xi System further comprise egress gateways control module (BGCF), and it is used to be transferred between the user terminal and this operator net or other operators net PSTN user terminal that this operator nets.
Described I-CSCF also includes：,
Whether judging unit, for judging whether calling and/or called belongs to same operator, or belong to
PSTN Wang Network, IMS network or other SIP networks user；
Adapter unit, is transferred for the result according to judging unit.
The invention also discloses the bridging method in a kind of IP multimedia subsystem, including：
User terminal is communicated according to I-CSCF routing rule with other user terminals, and the routing rule is：Real-time performance routes of the I-CSCF according to where calling subscribe.
Real-time performance routes of the described step I-CSCF according to where calling subscribe includes：
When caller is IMS user, networks of the I-CSCF according to where called user terminal is route；When caller is PSTN user, networks of the I-CSCF according to where called user terminal is route；When caller is other SIP networks user, networks of the I-CSCF according to where called user terminal is route.
Described step is when caller is IMS user, and networks of the I-CSCF according to where called user terminal carries out route and further comprised：
If called is IMS user, and calling and called belong to same operator, then turn to the called S-CSCF of this carrier network;
If called is IMS user, and calling and called belong to different operators, then turn to the I-CSCF of called carrier network;
If called is other SIP network users, directly to other SIP networks.
Described step is when caller is PSTN user, and networks of the I-CSCF according to where called user terminal carries out route and further comprised：
If called is IMS user, and calling and called belong to same operator, then turn to this operator net
The called S-CSCF of network;
If called is IMS user, and calling and called belong to different operators, then turn to the I-CSCF of called carrier network;
If called is PSTN user, the BGCF of network is turned to;
If called is other sip users, other SIP networks are turned to.
Described step is when caller is other SIP networks user, and networks of the I-CSCF according to where called user terminal carries out route and further comprised：
If called is IMS user, directly to the S-CSCF of called network;
If called is PSTN user, directly to the BGCR of network
The invention also discloses a kind of query call session control module, including：
Whether judging unit, for judging whether calling and/or called belongs to same operator, or belong to the user of PSTN network, IMS network or other SIP networks；
Adapter unit, is transferred for the result according to judging unit.
Invention additionally discloses a kind of Interconnection Border Control Function unit, including：
Adapter unit, the sip message of external network node is sent for receiving internal network nodes, and the sip message forwarding of reception is sent to external network node, the adapter unit is additionally operable to receive the sip message from external network, and sip message is forwarded to the corresponding node device inside net silk ribbon.
Described Interconnection Border Control Function unit also includes：ALG unit, for different IP version intercommunications.
The Interconnection Border Control Function unit being confused also includes：Control unit is carried, for controlling bearing resource during network interworking.
Described Interconnection Border Control Function unit can be individually present, and may also be arranged in I-CSCF and/or ALG.
Therefore, according to the present invention, in a network, intercommunication can be realized by I-CSCF and BGCF and outer net entity, so reduce some intercommunication interfaces, so that cylinder network.Or the only Interconnection Border Control Function unit by newly increasing（I-BCF intercommunication) is carried out with extraneous network, further simplifies network.
Brief description of the drawings Fig. 1 shows the schematic diagram of IMS bridge joints；
Fig. 2 shows the schematic diagram of the route of bridge system in the prior art；
Fig. 3 shows the schematic diagram of the route of the bridge system of the present invention；
Fig. 4 shows the schematic diagram of the route of another bridge system of the present invention.Embodiment understands and realized the present invention for the ease of persons skilled in the art, and embodiments of the invention are described in conjunction with accompanying drawing.
As shown in figure 3, the bridge system of the present invention includes I-CSCF, BGCF, S-CSCF and MGCF, in the bridge system of the present invention, the entity with routing function only has I-CSCF and BGCF between outer net.Illustrate I-CSCF, BGCF, S-CSCF and MGCF function with reference to Fig. 3.
I-CSCF is used to judge whether calling and/or called belongs to same operator, or whether belongs to the user that PST networks, IMS network or other SIP net Network, to be transferred according to judged result.Specifically, it may be implemented in is transferred between other SIP networks or the user terminal of IMS network and the user terminal of present networks of other operators；When other net PSTN user terminals are communicated with the user terminal of Home Network, after being transferred through BGCF, then transferred through I-CSCF；When Home Network PSTN user terminal is communicated with the user terminal of Home Network, transferred again through I-CSCF after MGCF.The I-CSCF includes：Judging unit, for judging whether calling and/or called belongs to same operator or whether belong to PSTN networks or IMS network；Adapter unit, is transferred for the result according to judging unit.
BGCF is used to be transferred between this operator network users terminal and this operator net or other operators net PST i user terminal.
The BGCF or I-CSCF that S-CSCF is netted for this operator net IMS user terminals with this operator are transferred.
MGCF is used for this operator net PSTN user terminals and transferred with seeking the I-CSCF of business's net.It should be understood that above-mentioned I-CSCF adapter unit is a logic unit, its can with I-CSCF or
MGCF is closed and set, or as independent physical entity.As shown in figure 4, above-mentioned I-CSCF adapter unit is a completely self-contained Interconnection Border Control Function unit（I-BCF), it is used for when calling and/or called is not belonging to local operator, according to the configuration of operator, transferred in transmission/reception sip message by the unit, to avoid S-CSCF, I-CSCF directly with external network communication, so as to prevent from present networks topology information (information such as quantity, ability, address of such as serving CSCF) being exposed to other networks.Further, since the functional unit is the boundary point with external network intercommunication, so can also integrated ALG on the unit（ALG) function so that present networks with other networks if there is IP version it is different when（Such as IPv6 networks and IPv4 networks）, application layer IP version intercommunication is realized in the unit.Furthermore, can be with integrated bearer control function, to control bearing resource during intercommunication in the unit.So, when the functional unit communicated in existing network with outside SIP networks or outside IP network receives the sip message of the past external network of forwarding, the sip message of forwarding is forwarded to I-BCF first, corresponding external network node is forwarded to by I-BCF again, in addition, all sip messages from external network are dealt into I-BCF first, then sip message is forwarded to by I-BCF the corresponding node device of network internal.Therefore, described Interconnection Border Control Function unit includes：Adapter unit, for sip message of transferring, to hide the topology information of network, specifically, described adapter unit is used to receive the sip message that internal network nodes send external network node, and the forwarding of the sip message of reception is sent to external network node, the adapter unit is additionally operable to receive the sip message from external network, and sip message is forwarded to the corresponding node device of network internal；ALG (ALG) unit, to realize the different IP version intercommunications of application layer during network interworking；Control unit is carried, for controlling bearing resource during network interworking.
I-BCF may be provided at ALG (ALGs）, I-CSCF or be individually present.Describe for convenience, following examples are so that Interconnection Border Control Function unit is arranged in I-CSCF as an example.
In the bridging method of the present invention, MGCF and S-CSCF can only realize intercommunication with this network entity, can realize that the entity of route only has I-CSCF and BGCF with outer network entity.So using the routed path of some situations in the present invention, situation 1-12 just to be changed.Table 3 lists the situation of all changes.
Feelings caller is called shape
2 IMS users（A fortune serving CSCF (A inquiry CSCF inquiry CSCF serving CSCF IMS users（B
Seek business）Operator）(A operators）(B runs (B operators）Operator）Business）
5 IMS users（(A Check ask other SIP Wang Network of CSCF battalion business to A fortune serving CSCF）Operator）(A operators）User
(A fortune passes through MGCF to 8 other SIP networks inquiry CSCF BGCF
User (A operators）Seek business）To PSTN user
(A operators）
9 inquire about the blunt business CSCF IMS users of CSCF Λ from PSTN with inquiry CSCF（MGCF (A (the A operators at B families）(B runs (B operators）Operator）Operator）Business）
10 from PSTN inquiry CSCF BGCF (MGCF (A (the A operators that A fortune passes through MGCF families）Seek business）To PSTN user operator）(A operators）
11 from PSTN inquiry CSCF BGCF (A BGCF (MGCF (A (the A operators that B fortune passes through MGCF families）Operator）Seek business）To PST user operator) (B operators）
12 from MGCF (A (A operators of the PSTN with other SIP network families of inquiry CSCF）User operator）As shown in table 3, all transferred in these route situations by I-CSCF, script is completed by S-CSCF by I-CSCF or the routing function that ENUM MGCF is realized is added.Numbering represents the part routed path of scene 8 ~ 12 in the present invention in please referring also to Fig. 3, the figure.The routing procedure under the situation is described by taking situation 2,9 and 11 as an example below.
Situation 2, IMS user call IMS user（Caller belongs to different operators with called).When S-CSCF receives the request message that IMS user sends, judge simultaneously it is called be not PSTN user after, then forwarding request is to I-CSCF, then I-CSCF judges that called is to belong to different operators, then by the I-CSCF of message forwarding to called operator, the I-CSCF of called operator obtains the S- CSCF addresses of called subscriber, final called subscriber is forwarded to finally by the S-CSCF by being interacted with HSS.
Situation 9, PSTN user call IMS user（Caller belongs to different operators with called）.After MGCF receives the request message that PSTN user sends, with regard to direct forwarding request to I-CSCF, I- CSCF judge that called belonged to after different operators with ENUM mechanism, just message is continued to be forwarded to the I-CSCF of called operator, called I-CSCF with HSS by interacting, the S-CSCF addresses of called subscriber are obtained, final called subscriber is forwarded to finally by the S-CSCF.
Situation 11, PSTN user calling PSTN user（Caller belongs to different operators with called）.After MGCF receives the request message that PSTN user sends, with regard to direct forwarding request to I-CSCF,
I-CSCF judges that called is to belong to PSTN user with ENUM mechanism, then by message forwarding to BGCF, BGCF judges that called belonged to after different operators, continues forwarding message to called BGCF, final called PSTN user is forwarded to finally by called MGCF.
With reference to Fig. 3 and table 3, I-CSCF, BGCF, S-CSCF and MGCF work(^ in the present invention under description
I-CSCF has concentrated many routing functions, and it can realize route, including situations below between Home Network, the entity of outer net：
Lan when caller is IMS user,
If called is IMS user, and the called S-CSCF for belonging to same operator with caller, then routeing that forward entity is this carrier network;
If called is IMS user, and the called I-CSCF for belonging to different operators with caller, then routeing that forward entity is called carrier network;
If called is other SIP network users, other SIP networks are routed directly to.
■ as caller PSTN user,
If called is IMS user, and the called S-CSCF for belonging to same operator with caller, then routeing that forward entity is ^ battalion business's network;
If called is IMS user, and the called I-CSCF for belonging to different operators with caller, then routeing that forward entity is called carrier network;
If called is PSTN user, route forward entity is the BGCF of Home Network.
If called is other sip users, other SIP networks are routed directly to.
■ when caller is other SIP networks user,
If called is IMS user, the S-CSCF of Home Network is routed directly to.
If called is PSTN user, the BGCF of Home Network is routed directly to.
BGCF routing function is identical with the prior art that table 1 is described, and is not discussed herein.
S-CSCF can only realize route between the entity of Home Network, and the entity of forward includes situations below：If it is PST i users that Geld is called, ask just to be transmitted to the BGCF of Home Network.
If it is non-PSTN user that ■ is called, ask just to be transmitted to the I-CSCF of Home Network.
MGCF is only when caller is PSTN user, and the entity just plays route, no matter the I-CSCF of which kind of situation MGCF route forward entity always Home Network.
Therefore, according to the present invention, in a network, due to only having I-CSCF and BGCF and outer net entity to realize intercommunication, so reduce some intercommunication interfaces, so that cylinder network.In addition, no matter the route forward entity of which kind of situation MGCF and other SIP networks always I-CSCF, so allowing for I-CSCF has concentrated many routing functions, be conducive to the unified management of whole routing function.Furthermore, only retain BGCF and I-CSCF as external route point, the angle hidden from topology decreases the security risk of network.
Although depicting the present invention by embodiment, it will be appreciated by the skilled addressee that without departing from the spirit and substance in the present invention, so that it may the present invention is had many deformations and change, the scope of the present invention is limited to the appended claims.
Claims (12)
- Claim1st, a kind of bridge system of IP multimedia subsystem, it is characterised in that including query call session control module (I-CSCF), service call session control module（S-CSCF ) ,I-CSCF is used to judge whether calling and/or called belongs to same operator, or whether belongs to the user of PSTN networks, IMS network or other SIP networks, so that the result according to judging unit is transferred；The egress gateways control module (BGCF) or I-CSCF that S-CSCF is netted for this operator net IMS user terminals with this operator are transferred.2nd, the bridge system of IP multimedia subsystem according to claim 1, it is characterised in that described I-CSCF also includes：Whether judging unit, for judging whether calling and/or called belongs to same operator, or belong to the user of PSTN network, IMS network or other SIP networks；Adapter unit, for just blunt it is judged that the result of unit is transferred.3rd, a kind of bridge system of IP multimedia subsystem, it is characterised in that including query call session control module（) and media network control module (MGCF), I-CSCFI-CSCF is used to judge whether calling and/or called belongs to same operator, or whether belongs to the user of PSTN networks, IMS network or other SIP networks, so that the result according to judging unit is transferred；MGCF is used to be transferred between the I-CSCF of PSTN user terminals and this operator net nets in this operator.4th, the bridge system of IP multimedia subsystem according to claim 3, it is characterised in that the bridge system further comprises egress gateways control module（), BGCF it is used to be transferred between the user terminal and this operator net or the user terminal of other operators net that this operator nets.5th, the bridge system for the IP multimedia subsystem being confused according to claim 3 or 4, it is characterised in that described I-CSCF also includes：Whether judging unit, for judging whether calling and/or called belongs to same operator, or belong to the user of PSTN network, IMS network or other SIP networks；Adapter unit, is transferred for the result according to judging unit. 6th, the bridging method in a kind of IP multimedia subsystem, it is characterised in that including：User terminal is communicated according to I-CSCF routing rule with other user terminals, and the routing rule is：Real-time performance routes of the I-CSCF according to where calling subscribe.7th, the bridging method in IP multimedia subsystem according to claim 6, it is characterised in that real-time performance routes of the described step I-CSCF according to where calling subscribe includes：When caller is IMS user, networks of the I-CSCF according to where called user terminal is route；When caller is PSTN user, networks of the I-CSCF according to where called user terminal is route；When caller is other SIP networks user, networks of the I-CSCF according to where called user terminal is route.8th, the bridging method in IP multimedia subsystem according to claim 7, it is characterised in that described step is when caller is IMS user, and networks of the I-CSCF according to where called user terminal carries out route and further comprised：Such as bright be called is IMS user, and calling and called belong to same operator, then turns to the called S-CSCF of this carrier network;If called is IMS user, and calling and called belong to different operators, then turn to the I-CSCF of called carrier network;Such as bright be called is other SIP network users, then directly to other SIP networks.9th, the bridging method in IP multimedia subsystem according to claim 7, it is characterised in that described step is as caller ^JPSTN user, and networks of the I-CSCF according to where called user terminal carries out route and further comprised：If called is IMS user, and calling and called belong to same operator, then turn to the called S-CSCF of this carrier network;If called is IMS user, and calling and called belong to different operators, then turn to the I-CSCF of called carrier network;If called is PSTN user, the BGCF of network is turned to;Such as bright be called is other sip users, then turns to other SIP networks.10th, the bridging method in IP multimedia subsystem according to claim 7, it is characterised in that Described step is when caller is other SIP networks user, and networks of the I-CSCF according to where called user terminal carries out route and further comprised：If called is IMS user, directly to the S-CSCF of called network;If called is PSTN user, directly to Wang Network BGCF.11st, a kind of query call session control module, it is characterised in that including：Whether judging unit, for judging whether calling and/or called belongs to same operator, or belong to the user of PSTN network, IMS net Network or other SIP networks；Adapter unit, is transferred for the result according to judging unit.12nd, a kind of Interconnection Border Control Function unit, it is characterised in that including：Adapter unit, the sip message of external network node is sent for receiving internal network nodes, and the sip message forwarding of reception is sent to external network node, the adapter unit is additionally operable to receive the sip message from external network, and sip message is forwarded to the corresponding node device of network internal.13rd, Interconnection Border Control Function unit according to claim 12, it is characterised in that described Interconnection Border Control Function unit also includes：ALG unit, for different IP version intercommunications.14th, the Interconnection Border Control Function unit according to claim 12 or 13, it is characterised in that described Interconnection Border Control Function unit also includes：Control unit is carried, for controlling bearing resource during network interworking.15th, the Interconnection Border Control Function unit according to claim 12 or 13, it is characterised in that described Interconnection Border Control Function unit can be individually present, and may also be arranged in I-CSCF and/or ALG.16th, Interconnection Border Control Function unit according to claim 14, it is characterised in that described Interconnection Border Control Function unit can be individually present, and may also be arranged in I-CSCF and/or ALG.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510093677 | 2005-09-01 | ||
| CN200510093677.5 | 2005-09-01 | ||
| CN200610000282.0 | 2006-01-10 | ||
| PCT/CN2006/001810 WO2007025443A1 (en) | 2005-09-01 | 2006-07-24 | A bridging system in the ip multimedia subsystem and the method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101156401A true CN101156401A (en) | 2008-04-02 |
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|---|---|---|---|
| CNA2006800116355A Pending CN101156401A (en) | 2005-09-01 | 2006-07-24 | Bridging connection system and method for IP multimedia subsystem |
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| CN (1) | CN101156401A (en) |
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2006
- 2006-07-24 CN CNA2006800116355A patent/CN101156401A/en active Pending
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