CN101854612B

CN101854612B - IMS domain dialogue control method, system and supplementary business server

Info

Publication number: CN101854612B
Application number: CN 200910081149
Authority: CN
Inventors: 甘亮; 王钊
Original assignee: China Mobile Communications Group Co Ltd
Current assignee: China Mobile Communications Group Co Ltd
Priority date: 2009-04-03
Filing date: 2009-04-03
Publication date: 2012-12-26
Anticipated expiration: 2029-04-03
Also published as: CN101854612A

Abstract

The invention relates to the filed of mobile communication, and provides an IMS domain dialogue control method, a system and a supplementary business server, which can be used for realizing coloring ring back tone forwarding no reply business of an IMS domain. In the technical scheme provided by the embodiment of the invention, when the supplementary business server taking as a second called user has no reply, the coloring ring back tone forwarding no reply business is triggered, the dialogue is utilized to update and notify a forwarding user set in the second user by a first calling user to initiate the media negotiation capability process, thereby realizing the coloring ring back tone forwarding no reply business; further, even if the calling port and other media capacity information changes in the calling process, the calling can normally listen to or watch coloring ring back tone customized by the forwarding user because of second negotiation.

Description

A kind of IMS domain dialogue control method, system and supplementary business server

Technical field

The present invention relates to mobile communication technology, particularly a kind of IMS territory CRBT Call Forwarding No Reply technology.

Background technology

IMS (IP Multimedia Subsystem, IP Multimedia System) has become one of focus of mobile communication technology at present as a kind of new technology that realizes call.CRBT is realized through following functional entity in the IMS territory as a kind of value-added service:

CSCF (Call Session Control Function; CSCF) is call conversation control function entity; This functional entity can be divided into: P-CSCF (Proxy-CSCF; Proxy CSCF), I-CSCF (Interrogating-CSCF, inquiry CSCF) and S-CSCF (Serving-CSCF, serving CSCF).Wherein S-CSCF is whole server, supports SIP (Session Initial Protocol, Session initiation Protocol) agreement, is responsible for subscription authentication, session processing and service trigger etc.;

The medium color ring server is claimed CRBT AS (Application Server, application server) or MRBT (Multimedia Ring Back Tone, multimedia audible ringing tone) AS again.The SIP signaling of being responsible for Ring Back Tone service is consulted the broadcast of switching and control CRBT, is used to control the realization of media ring function etc.;

MRF (Media Resource Function, media resource function) entity is responsible for the negotiation of media capability and is used for the broadcast of CRBT medium, and MRF can independently be provided with, and also can be arranged on the medium color ring server.

Referring to shown in Figure 1, the signaling process of a kind of CRBT implementation in IMS comprises the steps:

1-4: calling UE (User Equipment) A makes a call to called UE B; Carry session invitation (INVITE) message of UEA Session Description Protocol SDP (Session Description Protocol) UE A to called transmission through calling UE A side network; The S-CSCF of called ownership carries out the professional assessment of iFC to UEB; Confirm the business attribute information of UEB, confirm that according to the business attribute information of UEB UEB has signed Ring Back Tone service after, INVITE is transmitted to multimedia color ring back tone AS; After multimedia color ring back tone AS receives INVITE and carries out necessary Business Processing; Through S-CSCF INVITE is transmitted to called UE B, SDP UEA characterizes the media capability of UEA, comprises the information such as media coding mode, code check or port numbers that UEA supports;

After 5-6:UEB receives INVITE, confirm to reply then to reply 180 response messages and begin ring (Ringing);

7-9: when multimedia color ring back tone AS receives 180 response messages of called UE B; Send the INVITE that carries SDP UEA to MRF; Be established to the connection of MRF; And obtain the SDP of the CRBT medium after MRF consults according to SDPUEA, the SDP of CRBT medium is based on the result after the media capability descriptor selection of UEA and MRF;

10-19: multimedia color ring back tone AS replys 180 response messages to calling UE A; Wherein carry the SDP of CRBT medium; Calling UE A replys the PRACK message authentication, the corresponding answer 200 OK message of multimedia color ring back tone AS, and MRF plays the multimedia color ring back tone file of UEB customization to calling UE A.

If called UE B off-hook is replied, then set up conversation between the calling and called.

In mobile communication technology; If mobile communication subscriber has been registered the Call Forwarding No Reply function and extremely second called of call forwarding has been set; Then this user during as called no response, prior art does not provide the professional technical scheme of CRBT Call Forwarding No Reply that realizes the IMS territory.

Summary of the invention

The embodiment of the invention provides a kind of IMS domain dialogue control method and supplementary business server, and is professional in order to the CRBT Call Forwarding No Reply of realizing the IMS territory.

For this reason, the embodiment of the invention provides a kind of IMS domain dialogue control method, comprising:

Second user's that the CRBT Call Forwarding No Reply is professional supplementary business server; Monitoring for second user's no response duration reaches when setting duration; First customer call, second user's session invitation is sent to the S-CSCF of second user's forwarding subscriber ownership, and the first user media ability description information is carried in said session invitation;

When the S-CSCF of forwarding subscriber ownership confirms that forwarding subscriber is color ring user; CRBT RACS through forwarding subscriber is invited session and is sent to forwarding subscriber, and the ring response of the forwarding subscriber that the CRBT RACS of forwarding subscriber is transmitted sends to supplementary business server;

Supplementary business server generates the session updates Intra-request Concurrency and gives first user; And receive session updates acknowledge message that first user returns and the CRBT RACS that is transmitted to forwarding subscriber; Carry the first media capability descriptor in the said session updates acknowledge message; The said first media capability descriptor is the said first user media ability description information; Perhaps be that first user consults the media capability descriptor that the back is confirmed according to said first user media ability description information and the 3rd media capability descriptor; Before CRBT RACS that said the 3rd media capability descriptor is said forwarding subscriber is transmitted the ring response of forwarding subscriber, obtain behind media capability descriptor and the said first user media ability description information reconciliation of the CRBT RACS of said forwarding subscriber according to self;

The CRBT RACS of forwarding subscriber is according to self the media capability descriptor and the first media capability descriptor; The second media capability descriptor after confirm consulting, and play the CRBT of forwarding subscriber customization to first user according to the said second media capability descriptor.

Wherein: said supplementary business server receives session updates acknowledge message that first user returns and the CRBT RACS that is transmitted to forwarding subscriber; Specifically comprise: said supplementary business server receives the session updates acknowledge message that first user returns, and is transmitted to the multimedia polyphonic ringtone server in the CRBT RACS of forwarding subscriber; And

The CRBT RACS of said forwarding subscriber is according to self the media capability descriptor and the first media capability descriptor; The second media capability descriptor after confirming to consult; And according to the said second media capability descriptor to the CRBT that first user plays forwarding subscriber customization, specifically comprise:

Said multimedia polyphonic ringtone server is sent session invitation to the media resource function entity, wherein carries the first media capability descriptor;

The second media capability descriptor after said media resource function entity is confirmed to consult according to self media capability descriptor and the first media capability descriptor, and the second media capability descriptor is carried at returns to multimedia polyphonic ringtone server in the acknowledge message;

Said multimedia polyphonic ringtone server indication media resource function entity is play the CRBT of forwarding subscriber customization to first user, and is sent acknowledge message to said supplementary business server according to the said second media capability descriptor.

Further, the CRBT RACS of said forwarding subscriber also obtains the first user media ability description information before session invitation is sent to forwarding subscriber from said session invitation;

The CRBT RACS of said forwarding subscriber is confirmed said the 3rd media capability descriptor before transmitting the ring response of forwarding subscriber;

The CRBT RACS of said forwarding subscriber carries the 3rd media capability descriptor after the said negotiation in the ring response that is transmitted to supplementary business server;

Carry the 3rd media capability descriptor after the said negotiation in the session updates request that supplementary business server generates.

The embodiment of the invention also provides a kind of IMS territory session control supplementary business server, comprising:

Being used to monitor called second user's no response duration reaches when setting duration; First customer call, second user's session invitation is sent to the unit of S-CSCF of second user's forwarding subscriber ownership, the first user media ability description information is carried in said session invitation;

Be used to receive the unit of the ring response of the forwarding subscriber that the S-CSCF of forwarding subscriber ownership transmits;

Be used to generate the session updates Intra-request Concurrency and give first user; And the unit that receives session updates acknowledge message that first user returns and the CRBT RACS that is transmitted to forwarding subscriber; Carry the first media capability descriptor in the said session updates acknowledge message; The said first media capability descriptor is the said first user media ability description information; Perhaps be that first user consults the media capability descriptor that the back is confirmed according to said first user media ability description information and the 3rd media capability descriptor; Before CRBT RACS that said the 3rd media capability descriptor is said forwarding subscriber is transmitted the ring response of forwarding subscriber, obtain behind media capability descriptor and the said first user media ability description information reconciliation of the CRBT RACS of said forwarding subscriber according to self.

The embodiment of the invention also provides a kind of IMS territory conversation control system; Comprise: the S-CSCF of second user's that the CRBT Call Forwarding No Reply is professional supplementary business server, the service call conversation control function module S-CSCF of second user attaching, second user's forwarding subscriber ownership, the CRBT RACS of forwarding subscriber, wherein:

Said supplementary business server monitored for second user's no response duration and reaches when setting duration; First customer call, second user's session invitation is sent to the S-CSCF of second user's forwarding subscriber ownership, and the first user media ability description information is carried in said session invitation;

When the S-CSCF of said forwarding subscriber ownership confirms that forwarding subscriber is color ring user; CRBT RACS through forwarding subscriber is invited session and is sent to forwarding subscriber, and the ring response of the forwarding subscriber that the CRBT RACS of forwarding subscriber is transmitted sends to said supplementary business server;

Said supplementary business server generates the session updates Intra-request Concurrency and gives first user; And receive session updates acknowledge message that first user returns and the CRBT RACS that is transmitted to forwarding subscriber; Carry the first media capability descriptor in the said session updates acknowledge message; The said first media capability descriptor is the said first user media ability description information; Perhaps be that first user consults the media capability descriptor that the back is confirmed according to said first user media ability description information and the 3rd media capability descriptor; Before CRBT RACS that said the 3rd media capability descriptor is said forwarding subscriber is transmitted the ring response of forwarding subscriber, obtain behind media capability descriptor and the said first user media ability description information reconciliation of the CRBT RACS of said forwarding subscriber according to self;

The CRBT RACS of said forwarding subscriber is according to self the media capability descriptor and the first media capability descriptor; The second media capability descriptor after confirm consulting, and play the CRBT of forwarding subscriber customization to first user according to the said second media capability descriptor.

In the technical scheme that provides according to the embodiment of the invention; Supplementary business server is as called second user's no response the time; It is professional to trigger the CRBT Call Forwarding No Reply; And utilize first user of session updates notice caller to initiate the media capability negotiation process once more, thereby realized the CRBT Call Forwarding No Reply to the forwarding subscriber that second user is provided with;

Further; Can carry media capability descriptor of self or the media capability descriptor after the negotiation first time in the session updates acknowledge message that first user returns; Like this; The CRBT RACS of forwarding subscriber is consulted according to the media capability descriptor of self and the secondary of the realization of the media capability descriptor in session updates request media capability information; Can realize that the color ring user Call Forwarding No Reply is professional in the IMS territory, even and media capability information such as caller port change has taken place in calling procedure, also can consult to have guaranteed that caller normally listens to or watch the CRBT of forwarding subscriber customization because of secondary.

Description of drawings

Fig. 1 is existing a kind of IMS territory Ring Back Tone service realization flow;

The triggering schematic flow sheet of the IMS territory CRBT Call Forwarding No Reply that Fig. 2 provides for the embodiment of the invention;

Session control schematic flow sheet after the IMS territory CRBT Call Forwarding No Reply that Fig. 3 provides for the embodiment of the invention triggers;

The IMS domain dialogue control method flow chart that Fig. 4 provides for the embodiment of the invention.

Embodiment

The embodiment of the invention provides a kind of IMS domain dialogue control method; Be used for realizing that in the IMS territory CRBT Call Forwarding No Reply is professional; Detect the called no response duration by called supplementary business server; And when the called no response duration reaches the setting duration, trigger the CRBT Call Forwarding No Reply, before being invited, session is given to the forwarding subscriber of called setting.

As shown in Figure 2, wherein, UE1 is the calling subscriber; UE2 is the called subscriber, and UE2 contracts and activated CFNR (Call Forwarding No Rely calls out no response) business; UE3 is the forwarding subscriber that UE2 is provided with, and UE2 and UE3 are the Ring Back Tone service user, and UE1, UE2 and UE3 possibly belong at consolidated network; Also wherein two ownership are at consolidated network, and Another Place To Fall is at other networks, or this three belongs at heterogeneous networks respectively.The professional triggering flow process of IMS territory CRBT Call Forwarding No Reply that the embodiment of the invention provides specifically comprises the steps:

The monitoring of S201, triggering no response duration

When the S-CSCF of called UE 2 ownership receives the INVITE of calling UE 1 calling called UE 2; Initial filter criteria iFC according to UE2 carries out the iFC assessment to UE2; When confirming that UE2 is the CFNR business; The session request is transmitted to the supplementary service AS of called ownership, supplementary service AS be responsible for triggering and control CFNR professional; INVITE carries the media capability descriptor SDP UE1 of UE1;

Supplementary service AS sends to MRBT AS with INVITE through the S-CSCF that UE2 belongs to, and starts the no response timer of 2 no response duration of monitoring UE;

The SDP UE1 that carries in the MRBT AS acquisition INVITE, and continue through the S-CSCF of UE2 ownership session invitation to be sent to UE2.

S202, media capability information reconciliation

The S-CSCF of UE2 ownership sends to MRBT AS with ring response (180ringing) message that UE2 returns; MRBT AS sends to MRF with INVITE; MRF is according to media capability descriptor of self and the media capability of SDP UE1; Media capability information SDP1 MRBT after confirming to consult; SDP1 MRBT is carried at ring confirms to send to MRBT AS in (200 OK) message, MRBT AS is carried at the S-CSCF and the supplementary service AS that belong to through UE2 successively in 180 message with SDP1 MRBT and sends to UE1.

The Play Control of S203, UE2 CRBT

UE1 returns 180 affirmation (PRACK) message according to 180 message; PRACK message arrives MRBTAS through the S-CSCF of UE2 ownership; MRBT AS indication MRF plays the CRBT of UE2 customization, and MRF plays the CRBT of UE2 customization to UE1 according to the media capability information after consulting.

Need to prove that MRBT AS and MRF form the CRBT RACS; Can merge setting; Also can independently be provided with, wherein: be well known to those skilled in the art with the relevant signalling interactive process of CRBT control between MRBT AS and the MRF, be not described in detail here.

Need to prove that also MRBT AS can also send 200 OK message to supplementary service AS and confirm that also be well known to those skilled in the art, present embodiment no longer specifies after receiving the PRACK message of UE1.

S204, no response timer expiry stop to play the UE2 CRBT

If supplementary service AS does not receive the relevant control signaling that the UE2 off-hook is replied when the no response timer expiry; Then utilize a series of cancellation (CANCEL) and cancellation to confirm (200 CANCEL) message; S-CSCF indication MRF through the UE2 ownership stops coloring ring back tone playing; Detailed process is well known to those skilled in the art, and is not described in detail here;

If the UE2 off-hook is replied before the no response timer expiry, then UE1 and UE2 set up conversation, and this process is well known to those skilled in the art, and is not described in detail here.

S205, triggering Call Forwarding No Reply

Supplementary service AS also changes (CALL IS BEING FOEWARDED) message through the S-CSCF of UE2 ownership before UE1 returns calling when the no response timer expiry, notice UE1 waits for; And can cry to the forwarding subscriber UE3 initiation that UE2 is provided with, S-CSCF and the S-CSCF that UE3 belongs to through the UE2 ownership send INVITE to UE3, wherein carry the SDP UE1 of UE1.

If after the S-CSCF of called UE 2 ownership carried out the iFC assessment to UE2, when confirming that UE2 is the bell user, then no longer through CRBT RACS and the supplementary service AS of UE2, detailed process was well known to those skilled in the art call signaling, repeats no more here.

After if the S-CSCF of called UE 2 ownership carries out the iFC assessment to UE2; Confirm that UE2 is a color ring user but when not activating the CRBT Call Forwarding No Reply; Then call signaling can not trigger Call Forwarding No Reply no longer through supplementary service AS, and UE2 does not have then call failure of off-hook at setting-up time.Detailed process is well known to those skilled in the art, and repeats no more here.

Supplementary service AS turns over journey and comprises after triggering Call Forwarding No Reply before the calling:

Supplementary service AS sends the INVITE of the SDP UE1 that carries UE1 to UE3; This INVITE is routed to the S-CSCF of UE3 ownership through the S-CSCF of UE2 ownership; The S-CSCF of UE3 ownership is according to the iFC assessment result of UE3; When confirming that UE3 is color ring user, the CRBT RACS through UE3 is invited session and is sent to UE3, and when UE3 returns the ring response; The ring response of the UE3 that the CRBT RACS of UE3 is transmitted sends to supplementary service AS, can carry the media capability descriptor SDP2 MRBT of the MRBT of UE3 in the ring response of the UE3 of forwarding;

Supplementary service AS generates session updates request (UPDATE) information and sending and gives UE1; And receive the CRBT RACS that session updates that UE1 returns is confirmed (200 OK UPDATE) message and is transmitted to forwarding subscriber; Carry the SDP UE1 of UE1 among the 200 OK UPDATE, perhaps UE1 is according to media capability information of self and the SDP2 UE1 after the SDP2 MRBT negotiation;

The CRBT RACS of UE3 is confirmed the last media capability descriptor SDP3 MRBT that consults according to self media capability descriptor and SDP UE1 or SDP2 UE1, and plays the CRBT of forwarding subscriber customization to UE1 according to SDP3 MRBT.

Here need to prove that the CRBT RACS of UE3 possibly comprise MRBT and MRF, consult the Signalling exchange of SDP MRBT and indication coloring ring back tone playing between the two and know, be not described in detail here for those skilled in the art.

According to said process; After the supplementary service AS of UE2 confirms the UE3 ring, generate UPDATE message and send to UE1, UE1 initiates media capability negotiation again according to this UPDATE message; CRBT RACS to UE3 sends SDP UE1; Perhaps according to the SDP2 UE1 after SDP UE1 and the SDP2 MRBT negotiation, the CRBT RACS of UE3 carries out media capability negotiation, and plays the CRBT of UE3 customization according to the SDP3 MRBT after consulting.In the polyphonic ringtone playing process, if the UE3 off-hook is replied, then UE1 and UE3 set up conversation, if surpass setting-up time UE3 not off-hook reply call failure then.

Detailed process is as shown in Figure 3, mainly may further comprise the steps:

S301-S310: calling UE 1 is called out UE2.UE2 is signatory and activated the CFNR business, and setting UE3 is the Call Forwarding No Reply user.The INVITE that carries UE1 media capability descriptor SDP1 UE1 that UE1 sends arrives UE2 through the MRBT of UE2 AS and supplementary service AS.

Consult media capability between the CRBT RACS of UE2 and the caller and play the CRBT of UE2; Negotiation mode is gateway (Gateway) mode for example, and supplementary service AS triggers Call Forwarding No Reply when the UE2 no answer timeout, sends out 181 message and gives UE1; Change in order to indicating call; And the CRBT RACS of indication UE2 stops to play the CRBT of UE2, and the detailed step of S301-S310 no longer is repeated in this description referring to shown in Figure 2 here.

S311-S321: supplementary service AS sends INVITE through the S-CSCF of UE2 ownership to UE3, wherein carries SDP1 UE1, after the S-CSCF of UE3 ownership receives INVITE; UE3 is carried out the iFC assessment; When confirming that UE3 is color ring user, INVITE is transmitted to UE3 through the MRBT of UE3 home network AS, and after UE3 returns 180ringing message; The 180ringing forwards is given the MRBT AS of UE3 home network; The MRBT AS of UE3 home network sends to MRF with INVITE after receiving the 180ringing message that UE3 returns, and is established to the connection of MRF; And receive the 200 OK acknowledge messages that MRF returns, can carry the media capability descriptor SDP2 MRBT of MRF in the 200OK acknowledge message.After MRBT AS receives the 200 OK acknowledge messages that MRF returns; SDP2 MRBT is carried in the 180ringing message; Through the S-CSCFM of UE3 ownership and the S-CSCFM of UE2 ownership, the 180ringing message of carrying SDP2 MRBT is sent to supplementary service AS.

S322-S333: supplementary service AS is according to the 180ringing message that receives; Confirm UE3 ring response; Then the 180 SDP MRBT that carry are upgraded (update) message and are sent to UE1 through calling out; Calling UE 1 is returned 200 OK message authentications and is received update message, carries the supplementary service AS of the SDP2 UE1 to UE2 of calling UE 1 after consulting in the 200 OK acknowledge messages;

The supplementary service AS of UE2 is carried at the MRBT AS that PRACK message is sent to UE3 with SDP2 UE1; The Invite message that SDP2 UE1 is carried in the MRBT AS transmission of UE3 is to MRF; After MRF holds consultation with self media capability according to SDP2 UE1 once more; Obtain final CRBT media capability SDP3 MRBT; And reply 200 OK to the MRBT of UE3 AS, wherein carry the SDP3 MRBT after the last negotiation, the CRBT that the MRBTAS indication MRF of UE3 begins to play to UE1 according to SDP3 MRBT the UE3 customization.

In another embodiment; Also can carry the media capability descriptor SDP1 UE1 of calling UE 1 in the 200 OK message that calling UE 1 is returned according to update message; Like this; MRF obtains final CRBT media capability after holding consultation with self media capability according to SDP1 UE1, and other steps are all just the same.

Send the MRBT AS that the 200OK message of carrying UE3 media capability descriptor SDP1 UE3 is given UE3 behind the S334-S337:UE3 off-hook, the MRBT AS of UE3 returns ACK to UE3 and confirms.

The MRBT AS of S338-S339:UE3 sends REINVITE to UE3, sets up the direct connection between calling UE 1 and the called UE 3.

S340-S341:UE3 wherein carries the media capability descriptor SDP2 UE3 of UE3 once more to the MRBT of UE3 AS loopback 200 OK message;

The MRBT AS of S342:UE3 sends session updates request (UPDATE) message through UPDATE message to calling UE 1, and the media capability descriptor of wherein carrying is the SDP2 UE3 that carries once more among 200 OK of called UE 3 loopback in a last step.

S343:UE1 is to 200 OK of the MRBT of UE3 AS loopback UPDATE response, wherein carries UE1 according to the media capability descriptor SDP3 UE1 after SDP1 UE1 and the SDP2 UE3 negotiation.

The MRBT AS indication MRF of S344:UE3 stops coloring ring back tone playing.

The MRBT AS of S345-S346:UE3 sends ACK and gives UE3, wherein carries the media capability descriptor after UE1 consults.

The 200 OK response that the MRBT AS of S347-S350:UE3 sends INVITE to calling UE 1 between UE1 and the UE3, utilizes the media capability information after SDP UE1 and SDP UE3 consult to set up session according to UE1.

The technical scheme that provides according to the embodiment of the invention; Can realize that the color ring user Call Forwarding No Reply is professional in the IMS territory; And according to the step 22 among Fig. 3 to 29; Between the MRBT of calling UE 1 and forwarding subscriber AS, carried out the negotiation once more of media capability,, also can normally listen to or watch the CRBT of UE3 customization in calling procedure even change has taken place media capability information such as calling UE 1 port.

According to shown in Figure 3, can know and see that each is as the message of request (offer), answer (answer) message that unique correspondence is all arranged is as response, and request and response relation in the control flow are cheer and bright, convenient control.For example: the offer that step 11 is carried SDP1 UE1 is corresponding with the answer that step 22 is carried SDP1 MRBT; The offer that step 15 is carried SDP1 UE1 is corresponding with the answer that step 34 is carried SDP1 UE3.

In sum, the IMS domain dialogue control method that provides of the embodiment of the invention mainly comprises the steps:

Second user's of S401, CRBT Call Forwarding No Reply business supplementary business server; Monitoring for second user's no response duration reaches when setting duration; First customer call, second user's session invitation is sent to the service call conversation control function module S-CSCF of second user's forwarding subscriber ownership, and the first user media ability description information is carried in said session invitation;

When the S-CSCF of S402, forwarding subscriber ownership confirms that forwarding subscriber is color ring user; CRBT RACS through forwarding subscriber is invited session and is sent to forwarding subscriber, and the ring response of the forwarding subscriber that the CRBT RACS of forwarding subscriber is transmitted sends to said supplementary business server;

S403, said supplementary business server generate the session updates Intra-request Concurrency and give first user; And receive session updates acknowledge message that first user returns and the CRBT RACS that is transmitted to forwarding subscriber, carry the first media capability descriptor in the said session updates acknowledge message;

The CRBT RACS of S404, forwarding subscriber is according to self the media capability descriptor and the first media capability descriptor; The second media capability descriptor after confirm consulting, and play the CRBT of forwarding subscriber customization to first user according to the said second media capability descriptor.

The embodiment of the invention also provides the control system of each network entity composition of accomplishing above-mentioned control method, mainly comprises: the S-CSCF of second user's that the CRBT Call Forwarding No Reply is professional supplementary business server, the service call conversation control function module S-CSCF of second user attaching, second user's forwarding subscriber ownership, the CRBT RACS of forwarding subscriber.Concrete control flow no longer is repeated in this description as previously mentioned here.

Obviously, those skilled in the art can carry out various changes and modification to the embodiment of the invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.

Claims

1. an IMS domain dialogue control method is characterized in that, comprising:

Second user's that the CRBT Call Forwarding No Reply is professional supplementary business server; Monitoring for second user's no response duration reaches when setting duration; First customer call, second user's session invitation is sent to the service call conversation control function module S-CSCF of second user's forwarding subscriber ownership, and the first user media ability description information is carried in said session invitation;

When the S-CSCF of forwarding subscriber ownership confirms that forwarding subscriber is color ring user; CRBT RACS through forwarding subscriber is invited session and is sent to forwarding subscriber, and the ring response of the forwarding subscriber that the CRBT RACS of forwarding subscriber is transmitted sends to said supplementary business server;

2. the method for claim 1 is characterized in that:

Said supplementary business server receives session updates acknowledge message that first user returns and the CRBT RACS that is transmitted to forwarding subscriber; Specifically comprise: said supplementary business server receives the session updates acknowledge message that first user returns, and is transmitted to the multimedia polyphonic ringtone server in the CRBT RACS of forwarding subscriber; And

3. the method for claim 1 is characterized in that:

The CRBT RACS of said forwarding subscriber also obtains the first user media ability description information before session invitation is sent to forwarding subscriber from said session invitation;

4. like the arbitrary described method of claim 1 ~ 3, it is characterized in that said supplementary business server began to monitor before second user's no response duration, also comprised:

When the S-CSCF of second user attaching receives said session invitation and confirms second user for CRBT Call Forwarding No Reply service-user, said session invitation is transmitted to supplementary business server;

Supplementary business server sends to second user with the S-CSCF of said session invitation through second user attaching, and begins to monitor second user's the no response duration.

5. method as claimed in claim 4 is characterized in that, said supplementary business server also comprises after the S-CSCF of said session invitation through second user attaching sent to second user:

After the S-CSCF of second user attaching receives second user's ring response, said session invitation is sent to second user's CRBT RACS;

The first user media ability description information of carrying in the session invitation of second user's CRBT RACS according to self media capability descriptor and reception, the fourth media ability description information after confirming to consult;

The fourth media ability description information of second user's CRBT RACS after with said negotiation is carried in the ring response and sends to first user; And, play the CRBT of second customization to first user according to the fourth media ability description information after the said negotiation.

6. method as claimed in claim 5 is characterized in that, said supplementary business server monitored for second user's no response duration and reaches when setting duration, also comprised:

Supplementary business server sends the session no answer message to the S-CSCF of second user attaching;

After the S-CSCF of second user attaching receives the session no answer message, notify second user's CRBT RACS to stop coloring ring back tone playing.

7. method as claimed in claim 6 is characterized in that, said supplementary business server also comprises after the S-CSCF of second user attaching sends the session no answer message:

Supplementary business server passes through the S-CSCF of second user attaching, the notification message that before second user sends calling, changes.

8. an IMS territory session control supplementary business server is characterized in that, comprising:

9. supplementary business server as claimed in claim 8 is characterized in that, also comprises:

Be used for the S-CSCF of said session invitation through second user attaching sent to second user, and begin to monitor the unit of second user's no response duration.

10. supplementary business server as claimed in claim 9 is characterized in that, also comprises:

Be used for reaching when setting duration monitoring for second user's no response duration, send the unit of session no answer message to the S-CSCF of second user attaching.

11. like the said supplementary business server of claim 10, it is characterized in that, also comprise:

Be used for after the S-CSCF of second user attaching sends the session no answer message, through the S-CSCF of second user attaching, the unit of the notification message that before second user sends calling, changes.

12. IMS territory conversation control system; It is characterized in that; Comprise: the S-CSCF of second user's that the CRBT Call Forwarding No Reply is professional supplementary business server, the service call conversation control function module S-CSCF of second user attaching, second user's forwarding subscriber ownership, the CRBT RACS of forwarding subscriber, wherein:

13. system as claimed in claim 12 is characterized in that:

14., it is characterized in that the CRBT RACS of said forwarding subscriber specifically comprises like claim 12 or 13 described systems: multimedia polyphonic ringtone server MRBT AS and media resource function entity MRF.