CN1681282B

CN1681282B - Realizing method of color bell service in CDMA system

Info

Publication number: CN1681282B
Application number: CN2004100308521A
Authority: CN
Inventors: 蔡永峰
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2004-04-07
Filing date: 2004-04-07
Publication date: 2010-06-09
Anticipated expiration: 2024-04-07
Also published as: CN1681282A

Abstract

The method includes following steps: A) the mobile station of calling party initiates a call to called party, MSC of calling party gets the subscription information of the user; according to address of trigger in subscription information; SCP of coloring ring back tone (CRBT) retransmits relevant signaling transmitted between MSC and SCP of intelligence service to implement intelligence service and CRBT, and with changing number to make the call connect to called party through the CRBT server; B) CRBT server sends out ring back tone customized by user to calling party when the called party is in idle state.

Description

Realize the method for Ring Back Tone service in a kind of code division multiple access system

Technical field

The present invention relates to the back tone service field in the wireless communication technology, relate in particular to the Ring Back Tone service implementation method in a kind of code division multiple access (CDMA) system.

Background technology

Ring Back Tone service is a business that allows the cellphone subscriber for the handset customization ring-back tone of oneself.The ring-back tone that the user can be customized is set to one section interesting to listen to music, perhaps one section recording.The mode of customization ring-back tone specifically can comprise: select music that service provider (SP) or operator provide as ring-back tone on corresponding website by the Internet (INTERNET); Can also be by dialing special Ring Back Tone service access code, record user's voice or one section music ring-back tone as himself.In user applies under the situation of Ring Back Tone service, when other users dialed this user's mobile phone, the ring-back tone of hearing was exactly music or the recording that this user selects.

Referring to Fig. 1, the prior art increases server of color ring back tone service (RBTS) and service provider (SP) in cdma network, wherein, RBTS is used to provide the ring-back tone voice resource, and the voice of broadcast customization before call through, this RBTS not only has exchange capacity as switch, and also has a database, the in store user profile of ring-back tone and the ring-back tone of various customization of having contracted, the user can or dial the various voice that specific phone selects operator to provide by the SP shown in the figure, this setting play specific ring-back tone both can for certain specific calling subscriber, can further include in the different time periods and play different ring-back tones, when other user dials this user, RBTS is according to called number, calling number, the current time, ring-back tone of Information Selection such as called subscriber's state is play on current relaying; SP provides various ring-back tones to the user, and the ring-back tone that the user is selected uploads on the RBTS.Except RBTS and SP that the above increases newly, the Service Control Point shown in Fig. 1 plays a part control and handles IN service in whole intelligent net system; Mobile switching centre (MSC) mainly finishes Service Switching Function and CCF, and wherein, O-MSC is an origin mobile switching centre, and T-MSC is a called visit ground mobile switching centre; Attaching position register (HLR) mainly is the essential information that is used to preserve mobile phone, comprises the signing service information that is used for intelligent call, and when mobile phone location upgraded (mobile phone power-on or mobile phone location change), HLR sent to MSC with these information; Service management point (SMP) realizes that in the figure, thick line is represented trunk line, can transmit speech and signaling, and other fine rule or dotted line is represented signaling link and data link respectively, can only transmit signaling and data to the management of the various data of SCP.

Adopt networking diagram as shown in Figure 1, the prior art utilizes following handling process to be implemented in Ring Back Tone service on the CDMA:

1), the calling subscriber calls out the called subscriber of the Ring Back Tone service of having contracted, this called subscriber can be common back paying color ring user, it also can be CDMA prepayment service (PPC)/centrex service (VPN) color ring user, must on same SCP platform, register with Ring Back Tone service but this PPC/VPN user's PPC/VPN is professional, because the called subscriber is intelligent subscriber, trigger called Ring Back Tone service to SCP at O-MSC;

2), to analyze the called subscriber be the Ring Back Tone service user to SCP, issues the switching number that comprises the RBTS number, indication O-MSC is transferred to RBTS with calling;

3), to RBTS, RBTS further arrives T-MSC with this call proceeding to O-MSC again with call proceeding;

4), the T-MSC calling called subscriber, called subscriber's mobile phone begins ring;

5), send Address Complete Message (ACM) to RBTS the T-MSC calling called subscriber time, be routed to calledly with expression, RBTS analyzes the information of the ACM that receives, according to the Ring Back Tone service information of customization, plays the ring-back tone of customization to the calling subscriber.

6), send response message (ANM) to RBTS behind called subscriber's off-hook, RBTS stops playing RBT after receiving this message, normal talking between the calling and called.

Though the prior art can be implemented in and realize Ring Back Tone service on the cdma network, but other IN service of realizing this business need Ring Back Tone service and for example PPC/VPN must be registered on same SCP, and in actual applications, occur Ring Back Tone service and other IN service possibly and be registered in situation on the different SCP respectively, and at this kind situation, prior art obviously can't realize Ring Back Tone service again.As seen, the Ring Back Tone service implementation method of prior art has the limitation on the range of application, can't realize Ring Back Tone service under Ring Back Tone service and other IN service are registered in situation on the different SCP.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of method that realizes Ring Back Tone service on CDMA, and this method can realize Ring Back Tone service under Ring Back Tone service and other IN service are registered in situation on the different SCP.

For achieving the above object, the invention provides the method that realizes Ring Back Tone service in a kind of code division multiple access system, key is, the address of the corresponding trigger in the user signing contract information of IN service and Ring Back Tone service will contract in advance from the address that the IN service SCP address is revised as Ring Back Tone service SCP, and this method comprises:

Steps A: calling subscriber's Mobile Origination is to called subscriber's calling, the mobile switching centre at calling subscriber place obtains this called subscriber's CAMEL-Subscription-Information, according to the trigger address in the CAMEL-Subscription-Information, Ring Back Tone service SCP transmits between mobile switching centre and the IN service SCP corresponding signaling realization IN service and Ring Back Tone service and will call out via server of color ring back tone service by the number of changing and is routed to the called subscriber at last;

Step B: server of color ring back tone service is play the ring-back tone of customization in advance to the calling subscriber when the called subscriber is idle condition.

Wherein, described corresponding trigger comprises that at least called routing address can use trigger;

Steps A comprises:

Steps A 11: the mobile switching centre at calling subscriber place obtains called subscriber's CAMEL-Subscription-Information from the HLR of called subscriber's ownership, trigger the initial terminal trigger in this CAMEL-Subscription-Information, trigger intelligent business arrives IN service SCP, and obtains called subscriber's roaming number from the HLR of called subscriber's ownership;

Steps A 12: the mobile switching centre at calling subscriber place utilizes described called routing address can use trigger, trigger Ring Back Tone service, and transmitting mobile switching centre and the analysis message between the IN service SCP and the analyzing responding message at calling subscriber place via Ring Back Tone service SCP, IN service SCP and Ring Back Tone service SCP realize IN service and Ring Back Tone service respectively; Can obtain to comprise at least the transferred number of Ring Back Tone service access code and called subscriber's roaming number with the mobile switching centre at calling subscriber place with the trigger number of changing by called routing address;

Steps A 13: the mobile switching centre at calling subscriber place arrives server of color ring back tone service according to the Ring Back Tone service access code in this transferred number with call proceeding, then, will call out the mobile switching centre that is routed to the called subscriber place by server of color ring back tone service according to the called subscriber's roaming number in the transferred number.

Wherein, steps A 11 comprises:

Steps A 111: the mobile switching centre at calling subscriber place sends location request message to the HLR of called subscriber's ownership, after this HLR receives this message, called subscriber's CAMEL-Subscription-Information is returned to the mobile switching centre at calling subscriber place by position request response message;

Steps A 112: the mobile switching centre at calling subscriber place is according to the trigger information in the called user subscription information, trigger the initial terminal trigger, send analysis message to IN service SCP, IN service SCP receives this analysis message, the called subscriber is carried out authentication, after authentication was passed through, the mobile switching centre to the calling subscriber place returned analyzing responding message, and indication calling subscriber mobile switching centre continues call treatment;

Steps A 113: the mobile switching centre at calling subscriber place sends location request message to the HLR of called subscriber's ownership, after this HLR receives this message, obtain called subscriber's roaming number by route request information and route requests response message from called subscriber's visit ground mobile switching centre, by position request response message this roaming number is returned to the mobile switching centre at calling subscriber place then.

Wherein, described corresponding trigger is whole triggers, and steps A 11 comprises:

Step a111: the mobile switching centre at calling subscriber place sends location request message to the HLR of called subscriber's ownership, after this HLR receives this message, called subscriber's CAMEL-Subscription-Information is returned to the mobile switching centre at calling subscriber place by position request response message;

Step a112: the mobile switching centre at calling subscriber place is according to the trigger information in the called user subscription information, trigger the initial terminal trigger, send analysis message through Ring Back Tone service SCP to IN service SCP, IN service SCP receives this analysis message, the called subscriber is carried out authentication, after authentication is passed through, transmit through Ring Back Tone service SCP, mobile switching centre to the calling subscriber place returns analyzing responding message, and indication calling subscriber mobile switching centre continues to call out;

Step a113: the mobile switching centre at calling subscriber place sends location request message to the HLR of called subscriber's ownership, after this HLR receives this message, obtain called subscriber's roaming number by route request information and route requests response message from called subscriber's visit ground mobile switching centre, by position request response message this roaming number is returned to the mobile switching centre at calling subscriber place then.

Wherein, steps A 12 comprises:

Steps A 121: the mobile switching centre at calling subscriber place triggers called routing address can use trigger, trigger Ring Back Tone service, the mobile switching centre at calling subscriber place sends to Ring Back Tone service SCP and analyzes message, Ring Back Tone service SCP utilizes query messages and query response message to obtain the address of IN service SCP from the HLR of called subscriber's ownership, then, the analysis forwards that the mobile switching centre at calling subscriber place in this step sent according to the IN service SCP address that obtains of Ring Back Tone service SCP is to IN service SCP;

Steps A 122: IN service SCP returns analyzing responding message via the mobile switching centre of Ring Back Tone service SCP to the calling subscriber place, comprises described transferred number in this analyzing responding message.

Wherein, further comprise the action code of handling the IN service result in order to expression IN service SCP described in the steps A 122 in the analyzing responding message,, then carry out described steps A 13 if this action code indication continues to call out, otherwise, process ends.

When the mobile switching centre at the mobile switching centre at calling subscriber place and called subscriber place was same mobile switching centre, steps A comprised:

Steps A 21: the mobile switching centre at calling subscriber and called subscriber place triggers the initial terminal trigger in this CAMEL-Subscription-Information, trigger intelligent business from the CAMEL-Subscription-Information that the HLR of called subscriber's ownership obtains the called subscriber;

Steps A 22: the mobile switching centre at calling subscriber and called subscriber place utilizes described called routing address can use trigger, trigger Ring Back Tone service, and via the mobile switching centre at Ring Back Tone service SCP forwarding calling subscriber place and the analysis message between the IN service SCP, IN service SCP returns analyzing responding message to Ring Back Tone service SCP, Ring Back Tone service SCP copies mobile switching centre from the roaming number that the HLR of called subscriber's ownership obtains the called subscriber, will comprise at least that then the transferred number of Ring Back Tone service access code and called subscriber's roaming number sends to the mobile switching centre at calling subscriber and called subscriber place.

Wherein, steps A 21 comprises:

Steps A 211: the mobile switching centre at calling subscriber place sends location request message to the HLR of called subscriber's ownership, after this HLR receives this message, called subscriber's CAMEL-Subscription-Information is returned to the mobile switching centre at calling subscriber place by position request response message;

Steps A 212: the mobile switching centre at calling subscriber place is according to the trigger information in the called user subscription information, trigger the initial terminal trigger, send analysis message to IN service SCP, IN service SCP receives this analysis message, the called subscriber is carried out authentication, after authentication was passed through, the mobile switching centre to the calling subscriber place returned analyzing responding message, and indication calling subscriber mobile switching centre continues to call out;

Steps A 213: the mobile switching centre at calling subscriber place sends location request message to the HLR of called subscriber's ownership, after this HLR receives this message, MSCID according to the mobile switching centre at the calling subscriber place of carrying in this message judges that the MSCID of the mobile switching centre that obtains the calling subscriber place is identical with the MSCID of the mobile switching centre at called subscriber place, and this HLR returns to the MSCID of the mobile switching centre at called subscriber place by position request response message the mobile switching centre at calling subscriber and called subscriber place.

Wherein, steps A 22 comprises:

Steps A 221: the mobile switching centre at calling subscriber place triggers called routing address can use trigger, trigger Ring Back Tone service, the mobile switching centre at calling subscriber place sends to Ring Back Tone service SCP and analyzes message, Ring Back Tone service SCP utilizes query messages and query response message to obtain the address of IN service SCP from the HLR of called subscriber's ownership, then, the analysis forwards that the mobile switching centre at calling subscriber place in this step sent according to the IN service SCP address that obtains of Ring Back Tone service SCP is to IN service SCP;

Steps A 222: IN service SCP returns analyzing responding message to Ring Back Tone service SCP, wherein, comprises the action code of handling the IN service result in order to expression IN service SCP in this analyzing responding message at least;

Steps A 223: Ring Back Tone service SCP copies mobile switching centre to send location request message to the HLR of called subscriber's ownership, after this HLR receives this message, from the roaming number that called subscriber's visit ground mobile switching centre obtains the called subscriber, by position request response message this roaming number is returned to Ring Back Tone service SCP by route request information and route requests response message then;

Steps A 224: Ring Back Tone service SCP returns the response message of analyzing message in the step 221 to the mobile switching centre at calling subscriber place, comprises steps A 222 described action codes and described transferred number in this analyzing responding message at least.

Wherein, described corresponding trigger comprises the initial terminal trigger at least;

Steps A comprises:

Steps A 31: the mobile switching centre at calling subscriber place obtains called subscriber's CAMEL-Subscription-Information from the HLR of called subscriber's ownership, trigger the initial terminal trigger in this CAMEL-Subscription-Information, send analysis message to Ring Back Tone service SCP, Ring Back Tone service SCP realizes Ring Back Tone service, with utilize senior terminating trigger, make the mobile switching centre at calling subscriber place obtain to comprise at least the transferred number of Ring Back Tone service access code and called number;

Steps A 32: the mobile switching centre that is routed to the called subscriber via server of color ring back tone service will be called out according to transferred number by the mobile switching centre at calling subscriber place;

Steps A 33: called subscriber's mobile switching centre obtains called subscriber's CAMEL-Subscription-Information from the HLR of called subscriber's ownership, trigger the initial terminal trigger in this CAMEL-Subscription-Information, called subscriber's mobile switching centre sends to IN service SCP through Ring Back Tone service SCP and analyzes message, and IN service SCP realizes IN service.

Wherein, steps A 31 comprises:

Steps A 311: the mobile switching centre at calling subscriber place sends location request message to the HLR of called subscriber's ownership, after this HLR receives this message, called subscriber's CAMEL-Subscription-Information is returned to the mobile switching centre at calling subscriber place by position request response message;

Steps A 312: the mobile switching centre at calling subscriber place triggers the initial terminal trigger in the called user subscription information, sends to Ring Back Tone service SCP and analyzes message;

Steps A 313: Ring Back Tone service SCP to called subscriber's authentication after, Ring Back Tone service is set on this SCP triggers sign, mobile switching centre to the calling subscriber place returns analyzing responding message then, comprises senior terminating trigger in the list of triggers parameter in this message;

Steps A 314: the mobile switching centre at calling subscriber place triggers senior terminating trigger, send analysis message to Ring Back Tone service SCP, Ring Back Tone service SCP will comprise at least that by analyzing responding message the transferred number of Ring Back Tone service access code and called number sends to the mobile switching centre at calling subscriber place.

Steps A 33 comprises:

Steps A 331: called subscriber's mobile switching centre sends location request message to the HLR of called subscriber's ownership, after this HLR receives this message, called subscriber's CAMEL-Subscription-Information is returned to called subscriber's mobile switching centre by position request response message;

Steps A 332: called subscriber's mobile switching centre triggers the initial terminal trigger in this CAMEL-Subscription-Information, send analysis message to Ring Back Tone service SCP, Ring Back Tone service SCP removes Ring Back Tone service and triggers sign, then, Ring Back Tone service SCP utilizes query messages and query response message to obtain the address of IN service SCP from the HLR of called subscriber's ownership, then, Ring Back Tone service SCP according to the IN service SCP address that obtains with the called subscriber sent in this step analysis forwards to IN service SCP;

Steps A 333: IN service SCP sends analyzing responding message via the mobile switching centre of Ring Back Tone service SCP to the calling subscriber place, comprises the action code of handling the IN service result in order to expression IN service SCP in this analyzing responding message; With called subscriber's mobile switching centre by location request message and position request response message from the HLR of called subscriber's ownership information, according to this information acquisition called subscriber's roaming number with obtaining the current visit of called subscriber; Trigger called routing address with called subscriber's mobile switching centre and can use trigger, send analysis message to IN service SCP, IN service SCP returns analyzing responding message to called subscriber's mobile switching centre, comprises the action code of handling the IN service result in order to expression IN service SCP in this message.

Wherein, described corresponding trigger is whole triggers, and steps A 31 comprises:

Step a311: the mobile switching centre at calling subscriber place sends location request message to the HLR of called subscriber's ownership, after this HLR receives this message, called subscriber's CAMEL-Subscription-Information is returned to the mobile switching centre at calling subscriber place by position request response message;

Step a312: the mobile switching centre at calling subscriber place triggers the initial terminal trigger in the called user subscription information, sends to Ring Back Tone service SCP and analyzes message;

Step a313: Ring Back Tone service SCP to called subscriber's authentication after, Ring Back Tone service is set on this SCP triggers sign, mobile switching centre to the calling subscriber place returns analyzing responding message then, comprises senior terminating trigger in the list of triggers parameter in this message;

Step a314: the mobile switching centre at calling subscriber place triggers senior terminating trigger, send analysis message to Ring Back Tone service SCP, Ring Back Tone service SCP will comprise at least that by analyzing responding message the transferred number of Ring Back Tone service access code and called number sends to the mobile switching centre at calling subscriber place.

Steps A 33 comprises:

Step a331: called subscriber's mobile switching centre sends location request message to the HLR of called subscriber's ownership, after this HLR receives this message, called subscriber's CAMEL-Subscription-Information is returned to called subscriber's mobile switching centre by position request response message;

Step a332: called subscriber's mobile switching centre triggers the initial terminal trigger in this CAMEL-Subscription-Information, send analysis message to Ring Back Tone service SCP, Ring Back Tone service SCP removes Ring Back Tone service and triggers sign, then, Ring Back Tone service SCP utilizes query messages and query response message to obtain the address of IN service SCP from the HLR of called subscriber's ownership, then, Ring Back Tone service SCP according to the IN service SCP address that obtains with the called subscriber sent in this step analysis forwards to IN service SCP;

Step a333: IN service SCP sends analyzing responding message via the mobile switching centre of Ring Back Tone service SCP to the calling subscriber place, comprises the action code of handling the IN service result in order to expression IN service SCP in this analyzing responding message; With called subscriber's mobile switching centre by location request message and position request response message from the HLR of called subscriber's ownership information, according to this information acquisition called subscriber's roaming number with obtaining the current visit of called subscriber; Trigger called routing address with called subscriber's mobile switching centre and can use trigger, transmit via Ring Back Tone service SCP, send analysis message to IN service SCP, IN service SCP transmits via Ring Back Tone service SCP, mobile switching centre to the called subscriber returns analyzing responding message, comprises the action code of handling the IN service result in order to expression IN service SCP in this message.

Steps A comprises:

Steps A 41: the mobile switching centre at calling subscriber place obtains called subscriber's CAMEL-Subscription-Information from the HLR of called subscriber's ownership, trigger the initial terminal trigger in this CAMEL-Subscription-Information, Ring Back Tone service SCP transmits mobile switching centre and the analysis message between the IN service SCP and the analyzing responding message at calling subscriber place, realizes IN service;

Steps A 42: the mobile switching centre at calling subscriber place triggers senior terminating trigger, send analysis message to Ring Back Tone service SCP, Ring Back Tone service SCP copies the roaming number of mobile switching centre by the HLR acquisition called subscriber of called subscriber's ownership, and Ring Back Tone service SCP will comprise at least that the transferred number of Ring Back Tone service access code and called subscriber's roaming number sends to the mobile switching centre at calling subscriber place;

Steps A 43: the mobile switching centre at calling subscriber place arrives server of color ring back tone service according to the Ring Back Tone service access code in this transferred number with call proceeding, then, will call out the mobile switching centre that is routed to the called subscriber place again by server of color ring back tone service according to the called subscriber's roaming number in the transferred number.

Wherein, steps A 41 comprises:

Steps A 411: the mobile switching centre at calling subscriber place sends location request message to the HLR of called subscriber's ownership, after this HLR receives this message, called subscriber's CAMEL-Subscription-Information is returned to the mobile switching centre at calling subscriber place by position request response message;

Steps A 412: the mobile switching centre at calling subscriber place triggers the initial terminal trigger in the called user subscription information, sends to Ring Back Tone service SCP and analyzes message;

Steps A 413: Ring Back Tone service SCP utilizes query messages and query response message to obtain the address of IN service SCP from the HLR of called subscriber's ownership, then, Ring Back Tone service SCP according to the IN service SCP address that obtains with the called subscriber sent in the step 412 analysis forwards to IN service SCP;

Step 414: IN service SCP sends analyzing responding message via the mobile switching centre of Ring Back Tone service SCP to the calling subscriber place, comprises the action code of handling the IN service result in order to expression IN service SCP in this analyzing responding message.

Wherein, steps A 42 comprises:

Steps A 421: the mobile switching centre at calling subscriber place triggers senior terminating trigger, sends to Ring Back Tone service SCP and analyzes message;

Steps A 422: Ring Back Tone service SCP copies mobile switching centre to send location request message to the HLR of called subscriber's ownership, after this HLR receives this message, from the roaming number that called subscriber's visit ground mobile switching centre obtains the called subscriber, by position request response message this roaming number is returned to Ring Back Tone service SCP by route request information and route requests response message then;

Steps A 423: Ring Back Tone service SCP triggers called routing address can use trigger, send analysis message to IN service SCP, IN service SCP returns analyzing responding message to Ring Back Tone service SCP, comprises the action code of handling the IN service result in order to expression IN service SCP in this message;

Steps A 424: Ring Back Tone service SCP carries described transferred number to the response message that the mobile switching centre at calling subscriber place returns the analysis message that is sent in the steps A 421 in this message.

Wherein, step B comprises:

The called subscriber mobile switching centre judge called subscriber's current state, if called subscriber's current state is idle, then called subscriber's mobile switching centre sends Address Complete Message via the mobile switching centre of server of color ring back tone service to the calling subscriber place, the calling of setting up between calling subscriber and the called subscriber connects, server of color ring back tone service is play the ring-back tone of customization in advance, called subscriber's travelling carriage ring to the calling subscriber.

Wherein, if called subscriber's current state is busy, this method further comprises:

Called subscriber's visit ground mobile switching centre is directly to the prompt tone of mobile switching centre's play cuing called subscriber busy at calling subscriber place, and discharges the mobile switching centre at calling subscriber place and called subscriber and visit that the speech channel via server of color ring back tone service connects between the ground mobile switching centre.

Wherein, after the step B, this method further comprises:

Step C: called subscriber's off-hook is replied, and server of color ring back tone service stops the playing RBT to the calling subscriber, and calling subscriber and called subscriber converse.

Wherein, after the step C, this method further comprises:

Calling subscriber or called subscriber's on-hook, IN service SCP finishes IN service, and discharges the mobile switching centre at calling subscriber place and called subscriber and visit that the speech channel via server of color ring back tone service connects between the ground mobile switching centre.

Wherein, described IN service comprises CDMA prepayment service or centrex service.

As seen, in the present invention, realize IN service and Ring Back Tone service respectively by IN service SCP and Ring Back Tone service SCP, thereby make under Ring Back Tone service and IN service are registered in situation on the different SCP respectively, can utilize IN service SCP and Ring Back Tone service SCP, under the situation that does not influence the IN service realization, realize Ring Back Tone service; This method by increasing a server of color ring back tone service, is upgraded to the SCP business software and can be realized that the intelligent subscriber on the different SCP platforms uses Ring Back Tone service, thereby need not the conventional network equipment of upgrading in actual applications, is easy to promote and implement to the user.By Ring Back Tone service, substitute existing plodding ring-back tone with interesting to listen to music, make mobile operator provide the status that is in a leading position aspect individual business, the differentiated service, thereby promote the corporate image of operator for the user.In addition, Ring Back Tone service realized the fully open user of giving of the ability of communication network, on the user can the basis of customizing ring-back tone, makes user's oneself communication become more rich and varied, the final fully purpose of stimulation subscriber traffic that realizes.

Description of drawings

Fig. 1 is a Ring Back Tone service networking diagram of the prior art.

Fig. 2 is the Ring Back Tone service networking diagram among the present invention.

Fig. 3 is a flow chart of realizing Ring Back Tone service in one embodiment of the invention.

Fig. 4 is a flow chart of realizing Ring Back Tone service in another embodiment of the present invention.

Fig. 5 is a flow chart of realizing Ring Back Tone service in another embodiment of the present invention.

Fig. 6 is a flow chart of realizing Ring Back Tone service in another embodiment of the present invention.

Fig. 7 is a flow chart of realizing Ring Back Tone service in another embodiment of the present invention.

Fig. 8 is a flow chart of realizing Ring Back Tone service in another embodiment of the present invention.

Embodiment

The present invention is the method that realizes Ring Back Tone service on a kind of cdma network, this method

Describe the present invention below in conjunction with accompanying drawing.

Figure 2 shows that and realize networking diagram of the present invention, in Fig. 2, the last registration of PPC-SCP has cellphone subscriber's prepayment service, then registers the Ring Back Tone service that the cellphone subscriber is arranged on color ring SCP, and the realization function of all the other compositions and each composition is consistent with Fig. 1 among this figure.In other embodiments of the invention, difference according to the IN service of being realized, on another SCP different with the SCP of registration Ring Back Tone service, also registration has other corresponding service of vpn service for example etc., it is that example describes upward that the following embodiment of the invention only is registered in different SCP respectively with PPC business and Ring Back Tone service, be registered in situation on the different SCP for other IN service and Ring Back Tone service, the implementation method when the present invention realizes that the method for Ring Back Tone service and Ring Back Tone service professional with PPC is registered on the different SCP respectively is similar.

Whether support that according to the MSC among the CDMA called routing address can be with trigger (CDRAA) number of changing, and whether HLR supports different triggers to be signed in to different SCP, the present invention realizes that the idiographic flow of the method for Ring Back Tone service can be different, below whether support the CDRAA number of changing at MSC respectively, and whether HLR supports different triggers to be signed in to different SCP specific implementation flow process of the present invention is described.

Before each specific embodiment of the present invention is described, at first MSC is supported the CDRAA number of changing, and HLR supports different triggers to be signed in to different SCP to be explained:

(1) the CDRAA number of changing: realizing with Intellight network mode in the process of call proceeding, need to use a plurality of triggers in the called flow, wherein relevant with SCP trigger mainly comprises: triggers such as initial terminal (Initial_Termination) trigger, senior terminal (Advanced_Termination) trigger, CDRAA trigger, Tanswer trigger and Tdisconnect, wherein, senior terminating trigger can abbreviate ADVANCED as; In order to realize Ring Back Tone service, can calling be triggered to the SCP that is used to realize Ring Back Tone service by the SCP address of revising corresponding trigger, in the prior art, mostly be to realize call proceeding in the Ring Back Tone service by the ADVANCED trigger number of changing mode, in the present invention, the CDRAA number of the changing mode of being discussed refers to the SCP address of change CDRAA trigger, thereby make when triggering the CDRAA trigger, trigger can be reported to the SCP that realizes Ring Back Tone service, the modification of the continuous number that finally achieves a butt joint;

(2) HLR supports different triggers to be signed in to different SCP:

HLR supports different triggers to be signed in to different SCP: in cdma network, SCP can identify by a GT sign indicating number, and this GT sign indicating number is equivalent to the IP address in the Internet, is used to represent the address of SCP; In HLR, there is a tables of data respectively at each user, listed the GT sign indicating number of the different triggers pairing SCP relevant in this tables of data with call flow, HLR described in the present invention supports different triggers to be signed in to different SCP to refer to: the GT sign indicating number of the SCP of above-mentioned different trigger correspondence can be different, thereby, in calling procedure, because MSC can obtain the GT sign indicating number of the pairing different SCP of different triggers from HLR, therefore, MSC just can send to different SCP with each message of the different triggers of correspondence.

Whether support the CDRAA number of changing at MSC respectively below, and whether HLR supports different triggers to be signed in to the situation of different SCP, realization of the present invention is described in detail, in the following description, all with user A as the calling subscriber, user B is as the called subscriber, and user B is the PPC user who has registered Ring Back Tone service:

Embodiment 1:MSC supports the CDRAA number of changing, and HLR supports different triggers to be signed in to different SCP, and calling subscriber A and called subscriber B are respectively in different mobile switching centres;

Support CDRAA number of changing and HLR to support different triggers to be signed in under the situation of different SCP at MSC, for realizing the present invention, utilize HLR to support different triggers to be signed in to the function of different SCP, in the HLR of user B ownership, the SCP address of its CDRAA trigger is revised as the SCP address of Ring Back Tone service, thereby realize signatory Ring Back Tone service with this called subscriber B, and user B all the other CAMEL-Subscription-Information in the HLR of its ownership still remain the CAMEL-Subscription-Information when only contracting the PPC business originally, after having carried out above-mentioned modification, referring to Fig. 3, realize that the present invention needs following steps:

Step 301: calling subscriber A calls out called subscriber B, because in embodiments of the present invention, calling subscriber A and called subscriber B are respectively in different mobile switching centres, and therefore, calling subscriber A starts the called flow of user B in the mobile switching centre at its place;

Step 302～step 303: the mobile switching centre at calling subscriber A place sends position requests (LOCREQ) message to the HLR of called subscriber B ownership, obtain the CAMEL-Subscription-Information of called subscriber B with request, after this HLR receives this request, search the CAMEL-Subscription-Information that obtains user B, and the CAMEL-Subscription-Information of user B is returned to the mobile switching centre of calling subscriber A by locreq message;

Step 304～step 305: the mobile switching centre of calling subscriber A detects the Initial_Termination trigger, by this trigger, the mobile switching centre of calling subscriber A triggers the PPC business, thereby the SCP to the PPC business sends analytical information (ANLYZD) message, after the SCP of PPC business receives this ANLYZD message, called subscriber B is carried out authentication, after authentication is passed through, mobile switching centre to calling subscriber A returns analytical information response (anlyzd) message, and the mobile switching centre of indication calling subscriber A continues call treatment;

Step 306～step 309: the mobile switching centre of calling subscriber A sends LOCREQ message to the ownership HLR of called subscriber B, obtain the roaming number (TLDN) of called subscriber B in order to request, after the HLR of called subscriber B receives this message, mobile switching centre sends route requests (ROUTREQ) message to the visit ground of called subscriber B, obtain the roaming number of called subscriber B from this visit ground mobile switching centre with request, this visit ground mobile switching centre distributes a TLDN for this called subscriber, and this TLDN returned to the ownership HLR of called subscriber B by routreq message, this HLR returns to the TLDN of called subscriber B by LOCREQ response message (locreq) mobile switching centre of calling subscriber A again;

Step 310: the mobile switching centre of calling subscriber A detects the CDRAA trigger, wherein, the SCP address of this CDRAA trigger has been modified to the address of the SCP of Ring Back Tone service, the mobile switching centre of calling subscriber A triggers this CDRAA trigger, send ANLYZD message according to the SCP address in this trigger to the SCP of Ring Back Tone service, thereby in following steps 311～step 315, utilize the CDRAA number of changing to realize issuing new routing number;

Step 311～step 312: the SCP of Ring Back Tone service sends inquiry (SEARCH) message to the HLR of called subscriber B, realize the address of the SCP of PPC business with acquisition request called subscriber B, after the HLR of called subscriber B receives this SEARCH message, called subscriber B is realized that the SCP address of PPC business returns to the SCP of Ring Back Tone service by SEARCH response message (search);

Step 313: the SCP of Ring Back Tone service transmits ANLYZD message received in step 310 according to the SCP address of the PPC business of receiving to the SCP of this PPC business in step 312, so that the SCP of PPC business handles subsequent P PC operation flow;

After the SCP of step 314:PPC business receives ANLYZD message, return the response message (anlyzd) of ANLYZD to the SCP of Ring Back Tone service; Entrained parameter action code (ActionCode) is used to represent the result of the SCP of PPC business in this anlyzd message;

Step 315: after the SCP of Ring Back Tone service receives the anlyzd message that SCP sent of PPC business in the step 314, send ANLYZD response message (anlyzd) according to the parameter action code in this message to the mobile switching centre of calling subscriber A, mobile switching centre with indication calling subscriber A operates accordingly according to the result of the SCP of PPC business: if entrained parameter action code represents that the result of the SCP of PPC business serves as to continue call treatment in the anlyzd message of being sent in the step 314, then in this step, the SCP of Ring Back Tone service sends anlyzd message to the mobile switching centre of calling subscriber A, execution in step 316 and subsequent step thereof then, parameter action code in the anlyzd message that is sent in this step is used to indicate this mobile switching centre to continue to call out, and, also issue to the mobile switching centre of called subscriber A and turn to number: Ring Back Tone service access code+called subscriber's roaming number by this anlyzd message, wherein, the routing address of Ring Back Tone service access code is the address of server of color ring back tone service, and called subscriber's roaming number then is called subscriber's interim local directory number (TLDN); If entrained parameter action code represents that the result of the SCP of PPC business is a terminated call in the anlyzd message of being sent in the step 314, then in this step, the SCP of Ring Back Tone service sends anlyzd message to the mobile switching centre of calling subscriber A, indicating this mobile switching centre's terminated call, and finish whole call flows; Wherein, the anlyzd message in this step is the response message of the ANLYZD message of step 310;

Step 316: the mobile switching centre of calling subscriber A arrives server of color ring back tone service according to the number that turns in the anlyzd message that is sent with call proceeding in step 315, its specific implementation is: the mobile switching centre of calling subscriber A is the address of server of color ring back tone service according to the routing address that turns to number analysis to go out the CRBT service access code in the anlyzd message that is sent in step 315, the mobile switching centre of calling subscriber A sends initial address message to server of color ring back tone service, called number in this message is Ring Back Tone service access code+called subscriber's roaming number, and the calling number in this message is the number of calling subscriber A;

Step 317: server of color ring back tone service is with the mobile switching centre of call proceeding to called subscriber B place, its specific implementation is: server of color ring back tone service is according to the Ring Back Tone service access code in the called number of the initial address message that step 316 sent and as the number of the user B of original called party number, analysis obtains user B and has registered Ring Back Tone service, then, server of color ring back tone service sends initial address message to party B-subscriber's visit ground mobile switching centre, called number in this message is the roaming number that turns to the called subscriber B in the number described in the step 315, the calling number of this message is the number of calling subscriber A, according to called number, this message is sent to the mobile switching centre at called subscriber B place, thereby with the mobile switching centre of call proceeding to called subscriber B place;

Step 318: the state of called subscriber B is judged by the mobile switching centre at called subscriber B place, if called subscriber B is in idle condition, and then execution in step 319 and subsequent step thereof, otherwise, execution in step 333;

Step 319～step 320: set up between the mobile switching centre at called subscriber B place and the called subscriber B and call out, the travelling carriage ring of called subscriber B, the mobile switching centre of called subscriber B is in idle condition by parameter entrained in this message to ringback tone server indication called subscriber B to the full message in server of color ring back tone service return address;

Step 321: the Address Complete Message that the mobile switching centre of server of color ring back tone service analysis called subscriber B returns, determine to obtain called subscriber B by analysis result and be in idle condition, the Ring Back Tone service information that this server of color ring back tone service customizes in advance according to called subscriber B, play the ring-back tone of customization to calling subscriber A, simultaneously, server of color ring back tone service sends Address Complete Message to the mobile switching centre at calling subscriber A place, to set up the calling between called subscriber B and the calling subscriber A via server of color ring back tone service;

Step 322～step 324: called subscriber B off-hook is replied, the visit ground mobile switching centre at called subscriber B place sends TANSWER message to the SCP of PPC business, the SCP of notice PPC business begins to carry out the note expense, and the visit ground mobile switching centre at called subscriber B place sends response message to server of color ring back tone service;

Step 325: after server of color ring back tone service is received this response message, stop playing RBT to calling subscriber A, and, connecting the speech channel between calling subscriber A and the called subscriber B to calling subscriber A transmission response message, calling subscriber A and called subscriber B utilize this speech channel to converse;

Step 326～step 328: calling subscriber A or called subscriber B on-hook, the relaying speech channel between the SCP of release calling subscriber A or called subscriber B and PPC business; Be example with called subscriber B on-hook in the embodiment of the invention, called subscriber B on-hook, the mobile switching centre at called subscriber B place sends TDISCONNECT message to the SCP of PPC business, after the SCP of PPC business received this message, the mobile switching centre to called subscriber B place returned TDISCONNECT response message (tdisconnect);

Step 329～step 332: the mobile switching centre at called subscriber B place sends release message through the mobile switching centre of server of color ring back tone service to calling subscriber A place, the mobile switching centre at calling subscriber A place returns the release success message through the mobile switching centre of server of color ring back tone service to called subscriber B place, thereby discharge the relaying speech channel between calling subscriber A and the called subscriber B, then, finish this Ring Back Tone service flow process;

Among other embodiment of the present invention, when calling subscriber A on-hook, the process and the described process of above-mentioned steps 326～step 332 that discharge the relaying speech channel between calling subscriber and the called subscriber are similar;

Step 333～step 338: performed step when step 333～step 338 is in busy state for called subscriber B, after judging that in step 318 obtaining called subscriber B is in busy state, the mobile switching centre at called subscriber B place sends Address Complete Message through the mobile switching centre of server of color ring back tone service to calling subscriber A place, directly play busy tone or other prompt tone to calling subscriber A, then, utilize the release message of step 335～step 338 and the relaying speech channel between Release complete release calling subscriber A and the called subscriber B, finish this Ring Back Tone service flow process then.

Embodiment 2:MSC supports the CDRAA number of changing, HLR supports different triggers to be signed in to different SCP, and calling subscriber A and called subscriber B are in same mobile switching centre, in the present embodiment, described mobile switching centre all refers to the mobile switching centre at calling subscriber A and called subscriber B place;

Referring to Fig. 4, support CDRAA number of changing and HLR to support different triggers to be signed in under the situation of different SCP at MSC, for realizing the present invention, at first utilize HLR to support different triggers to be signed in to the function of different SCP, in the HLR of user B ownership, the SCP address of its CDRAA trigger is revised as the SCP address of Ring Back Tone service, thereby realize signatory Ring Back Tone service with this called subscriber B, and user B all the other CAMEL-Subscription-Information in the HLR of its ownership still remain the CAMEL-Subscription-Information when only contracting the PPC business originally, after having carried out above-mentioned modification, realize that the present invention needs following steps:

Step 401: calling subscriber A calls out called subscriber B, because in embodiments of the present invention, calling subscriber A and called subscriber B are in same mobile switching centre, and therefore, calling subscriber A starts called flow in the mobile switching centre at calling subscriber A and called subscriber B place;

Step 402～step 403: mobile switching centre sends position requests (LOCREQ) message to the HLR of called subscriber B ownership, obtain the CAMEL-Subscription-Information of called subscriber B with request, after this HLR receives this request, search the CAMEL-Subscription-Information that obtains user B, and the CAMEL-Subscription-Information of user B is returned to mobile switching centre by locreq message;

Step 404～step 405: mobile switching centre detects the Initial_Termination trigger, by this trigger, the mobile switching centre of calling subscriber A triggers the PPC business, SCP to the PPC business sends ANLYZD message, the SCP of PPC business carries out authentication to called subscriber B after receiving this ANLYZD message, after authentication is passed through, mobile switching centre to calling subscriber A returns anlyzd message, and the mobile switching centre of indication calling subscriber A continues to call out;

Step 406～step 407: mobile switching centre sends LOCREQ message to the HLR of called subscriber B, obtain the roaming number (TLDN) of called subscriber B in order to request, since attaching position register judge the MSCID obtain the mobile switching centre in the LOCREQ message and the called subscriber B of own preservation visit the MSCID of mobile switching centre identical, therefore judge and obtain called subscriber B and calling subscriber A at same MSC, the attaching position register of called subscriber B is directly to mobile switching centre's home position request response, comprise the visit ground MSCID of called subscriber B in this message, but do not comprise roaming number TLDN;

Step 408: mobile switching centre detects the CDRAA trigger, wherein, the SCP address of this CDRAA trigger has been modified to the address of the SCP of Ring Back Tone service, mobile switching centre triggers this CDRAA trigger, send ANLYZD message according to the SCP address in this trigger to the SCP of Ring Back Tone service, utilize the CDRAA number of changing to realize issuing new routing number in the subsequent step 409～step 417 thereby be implemented in;

Step 409～step 410: the SCP of Ring Back Tone service sends SEARCH message to the HLR of called subscriber B, address with the SCP of the PPC business of acquisition request called subscriber B, after the HLR of called subscriber B receives this SEARCH message, the SCP address of the PPC business of called subscriber B is returned to the SCP of Ring Back Tone service by search message;

Step 411: the SCP of Ring Back Tone service transmits ANLYZD message received in step 408 according to the SCP address of the PPC business of receiving to the SCP of this PPC business in step 410, so that the SCP of PPC business handles subsequent P PC operation flow;

After the SCP of step 412:PPC business receives ANLYZD message, return ANLYZD response message (anlyzd) to the SCP of Ring Back Tone service; Wherein, the response message of the ANLYZD message that this anlyzd message is step 411, entrained parameter action code (ActionCode) is used to represent the result of the SCP of PPC business in this anlyzd message;

Step 413～step 416: owing in the locreq of step 407 message, do not comprise the roaming number TLDN of called subscriber B, therefore, the SCP of Ring Back Tone service copies mobile switching centre to send LOCREQ message to the HLR of user B, obtain the roaming number of called subscriber B with request, the HLR of called subscriber B sends ROUTREQ message to mobile switching centre, obtain the roaming number of called subscriber B from this mobile switching centre with request, this mobile switching centre returns to the HLR of called subscriber B with the TLDN of called subscriber B by routreq message, and this HLR returns to the TLDN of called subscriber B by LOCREQ response message (locreq) SCP of the Ring Back Tone service of copying mobile switching centre again;

Step 417: the SCP of Ring Back Tone service is according to the parameter action code in the anlyzd message that SCP sent of PPC business in the step 412, send ANLYZD response message (anlyzd) to mobile switching centre, mobile switching centre operates accordingly according to the result of the SCP of PPC business with indication: if entrained parameter action code represents that the result of the SCP of PPC business serves as to continue call treatment in the anlyzd message of being sent in the step 412, then in this step, the SCP of Ring Back Tone service sends anlyzd message to mobile switching centre, execution in step 418 and subsequent step thereof then, parameter action code in the anlyzd message that is sent in this step is used to indicate this mobile switching centre to continue to call out, and, also issue to the mobile switching centre of called subscriber A and turn to number: Ring Back Tone service access code+called subscriber's roaming number by this anlyzd message, wherein, the routing address of Ring Back Tone service access code is the address of server of color ring back tone service, and called subscriber's roaming number then is called subscriber's interim local directory number (TLDN); If entrained parameter action code represents that the result of the SCP of PPC business is a terminated call in the anlyzd message of being sent in the step 412, then in this step, the SCP of Ring Back Tone service sends anlyzd message to mobile switching centre, indicating this mobile switching centre's terminated call, and finish whole call flows; Wherein, the anlyzd message in this step is the response message of the ANLYZD message of step 408;

Step 418: mobile switching centre arrives server of color ring back tone service according to the number that turns in the anlyzd message that is sent with call proceeding in step 417, its specific implementation is: mobile switching centre is the address of server of color ring back tone service according to the routing address that turns to number analysis to go out the CRBT service access code in the anlyzd message that is sent in step 417, mobile switching centre sends initial address message to server of color ring back tone service, called number in this message is Ring Back Tone service access code+called subscriber's roaming number, and the calling number in this message is the number of calling subscriber A;

Step 419: to mobile switching centre, wherein, this mobile switching centre is the mobile switching centre at called subscriber B and calling subscriber A place to server of color ring back tone service with call proceeding; Its specific implementation is: server of color ring back tone service is according to the Ring Back Tone service access code in the called number of the initial address message that step 418 sent and as the number of the user B of original called party number, analysis obtains user B and has registered Ring Back Tone service, then, server of color ring back tone service sends initial address message to mobile switching centre, called number in this message is the roaming number of called subscriber B, the calling number of this message is the number of calling subscriber A, according to called number, this message is sent to mobile switching centre, thereby mobile switching centre is arrived in call proceeding;

Step 420: the state of called subscriber B is judged by mobile switching centre, if called subscriber B is in idle condition, and then execution in step 421 and subsequent step thereof, otherwise, execution in step 432;

Step 421～step 422: set up between mobile switching centre and the called subscriber B and call out, the travelling carriage ring of called subscriber B, mobile switching centre is in idle condition by parameter entrained in this message to ringback tone server indication called subscriber B to the full message in server of color ring back tone service return address;

Step 423: the Address Complete Message that the mobile switching centre of server of color ring back tone service analysis called subscriber B returns, determine to obtain called subscriber B by analysis result and be in idle condition, the Ring Back Tone service information that this server of color ring back tone service customizes in advance according to called subscriber B, play the ring-back tone of customization to calling subscriber A, simultaneously, server of color ring back tone service sends Address Complete Message to mobile switching centre, to set up the calling between called subscriber B and the calling subscriber A via server of color ring back tone service;

Step 424～step 426: called subscriber B off-hook is replied, the visit ground mobile switching centre at called subscriber B place sends TANSWER message to the SCP of PPC business, the SCP of notice PPC business begins to carry out the note expense, and the visit ground mobile switching centre at called subscriber B place sends response message to server of color ring back tone service;

Step 427: after server of color ring back tone service is received this response message, stop playing RBT to calling subscriber A, and, connecting the speech channel between calling subscriber A and the called subscriber B to mobile switching centre's transmission response message, calling subscriber A and called subscriber B utilize this speech channel to converse;

Step 428～step 430: calling subscriber A or called subscriber B on-hook, the relaying speech channel between the SCP of release calling subscriber A or called subscriber B and PPC business; Be example with called subscriber B on-hook in the embodiment of the invention, called subscriber B on-hook, mobile switching centre sends TDISCONNECT message to the SCP of PPC business, after the SCP of PPC business receives this message, returns TDISCONNECT response message (tdisconnect) to mobile switching centre;

Step 431: discharge the relaying speech channel between calling subscriber A and the called subscriber B, then, finish this Ring Back Tone service flow process;

Among other embodiment of the present invention, when calling subscriber A on-hook, the process and the described process of above-mentioned steps 428～step 431 that discharge the relaying speech channel between calling subscriber and the called subscriber are similar;

Step 432～step 434: performed step when step 432～step 434 is in busy state for called subscriber B, after judging that in step 420 obtaining called subscriber B is in busy state, mobile switching centre directly plays busy tone or other prompt tone to the calling subscriber, then by the relaying speech channel between " release " message release calling and called.Flow process finishes.

Embodiment 3:MSC does not support the CDRAA number of changing, and HLR supports different triggers to be signed in to different SCP; In embodiments of the present invention, because HLR supports different triggers to be signed in to different SCP, therefore, revise the CAMEL-Subscription-Information of called subscriber B in the HLR of its ownership, the SCP address of Initial_Termination trigger wherein is modified to the address of the SCP of Ring Back Tone service, thereby realize signatory Ring Back Tone service with this called subscriber B, user B all the other CAMEL-Subscription-Information in the HLR of its ownership still remain the CAMEL-Subscription-Information when only contracting the PPC business originally, after having carried out above-mentioned modification, referring to Fig. 5, realize that the present invention needs following steps:

Step 501: calling subscriber A calls out called subscriber B, because in embodiments of the present invention, calling subscriber A and called subscriber B are respectively in different mobile switching centres, and therefore, calling subscriber A starts called flow in the mobile switching centre at its place; In other embodiment of the present invention,, then start called flow in this mobile switching centre if calling subscriber A and called subscriber B are positioned at same mobile switching centre;

Step 502～step 503: the mobile switching centre at calling subscriber A place sends position requests (LOCREQ) message to the HLR of called subscriber B ownership, obtain the CAMEL-Subscription-Information of called subscriber B with request, after this HLR receives this request, search the CAMEL-Subscription-Information that obtains user B, and the CAMEL-Subscription-Information of user B is returned to the mobile switching centre of calling subscriber A by locreq message;

Step 504～step 505: called flow detects the Initial_Termination trigger, because the SCP address of this Initial_Termination trigger has been revised as the SCP address of Ring Back Tone service, therefore, after triggering this trigger, the mobile switching centre at calling subscriber A place sends ANLYZD message to the SCP of Ring Back Tone service, after the SCP of Ring Back Tone service receives this message, called subscriber B is carried out authentication, after authentication is passed through, the SCP of Ring Back Tone service is masked as cleared condition and judges this time triggering and need carry out Ring Back Tone service by triggering from one's body Ring Back Tone service, at first the Ring Back Tone service on himself is triggered flag set, to represent that this Ring Back Tone service SCP carries out Ring Back Tone service, then, mobile switching centre to calling subscriber A place returns anlyzd message, comprises the Advanced_Termination trigger in the list of triggers parameter in this message;

Step 506～step 507: the mobile switching centre at calling subscriber A place triggers the Advanced_Termination trigger, SCP to Ring Back Tone service sends ANLYZD message, after the SCP of Ring Back Tone service receives this message, utilize the ADVANCED number of changing, issue to mobile switching centre and to turn to number, this turns to number to be: the number (MDN) of Ring Back Tone service access code+called subscriber B;

Step 508: the mobile switching centre at calling subscriber A place is according to the number that turns to that is issued in the step 507, server of color ring back tone service is arrived in call proceeding, its specific implementation is: the mobile switching centre at calling subscriber A place is a server of color ring back tone service according to the routing address that turns to number analysis to go out Ring Back Tone service access code wherein, this mobile switching centre sends initial address message to server of color ring back tone service, called number in this message is the number of Ring Back Tone service access code+called subscriber B, calling number is the number of calling subscriber A, utilizes this initial address message that server of color ring back tone service is arrived in call proceeding;

Step 509: server of color ring back tone service is according to the Ring Back Tone service access code in the called number of the initial address message that is sent in the step 508 with as the number of the called subscriber B of original called party number, analysis obtains called subscriber B and has registered Ring Back Tone service, then, server of color ring back tone service sends initial address message to the mobile switching centre at called subscriber B place, call proceeding is arrived the mobile switching centre at called subscriber B place, wherein, the called number of this initial address message is the number of called subscriber B, and calling number is the number of calling subscriber A;

Step 510～step 511: the mobile switching centre at called subscriber B place obtains the CAMEL-Subscription-Information of called subscriber B by the response message (locreq) of LOCREQ message and LOCREQ message from the HLR of called subscriber B;

Step 512: the mobile switching centre at called subscriber B place triggers the Initial_Termination trigger in the CAMEL-Subscription-Information, sends ANLYZD message to the SCP of Ring Back Tone service;

Step 513: after the SCP of Ring Back Tone service receives this ANLYAD message, to called authentication, after authentication is passed through, because the SCP in step 504 Colorful Ring Service triggers flag set to this called subscriber's Ring Back Tone service, therefore, the SCP of Ring Back Tone service triggers the PPC operation flow of called subscriber B, at first Ring Back Tone service is triggered the sign zero clearing, then, the SCP of Ring Back Tone service sends SEARCH message to the HLR of called subscriber B, with the SCP address of the PPC business of acquisition request called subscriber B;

Step 514: the HLR of called subscriber B returns the SCP address of the PPC business of called subscriber B to the SCP of Ring Back Tone service by the response message (search) of SEARCH;

Step 515～step 516: the SCP address of the PPC business that the SCP of Ring Back Tone service returns according to step 514, transmit in the received ANLYZD message of step 504 to the SCP of PPC business, after the SCP of PPC business receives this message, return the response message (anlyzd) of ANLYZD to the SCP of Ring Back Tone service, the action code parameter of this anlyzd message is used to represent the result of the SCP of PPC business;

Step 517: if the action code parametric representation terminated call in the step 516 in the anlyzd message, then the SCP of Ring Back Tone service sends anlyzd message to the mobile switching centre at calling subscriber A place, indicate this mobile switching centre's terminated call to handle, finish this Ring Back Tone service then; If the action code parametric representation in the step 516 in the anlyzd message continues to call out, then the SCP of Ring Back Tone service sends anlyzd message to the mobile switching centre at calling subscriber A place, indicate this mobile switching centre to finish to continue call treatment, execution in step 518 and subsequent step thereof then;

Step 518～step 519: the mobile switching centre at called subscriber B place sends LOCREQ message to the HLR of called subscriber B ownership, obtain the roaming number of called subscriber B with request, this HLR obtains sending the mobile switching centre of this message according to this LOCREQ message judgement and the mobile switching centre at the current place of called subscriber B is same mobile switching centre, this HLR returns the response message (locreq) of LOCREQ to the mobile switching centre at called subscriber B place, mobile switching centre's sign (MSCID) parameter that comprises the mobile switching centre at called subscriber B place in this locreq message, it is identical with the MSCID at the called subscriber B place that obtains from HLR that mobile switching centre analyzes self MSCID, directly is that called subscriber B distributes a TLDN;

Step 520: the mobile switching centre at called subscriber B place detects the CDRAA trigger, because the SCP address of this CDRAA trigger correspondence is the SCP address of PPC business, therefore, after triggering this trigger, the mobile switching centre at called subscriber B place sends ANLYZD message to the SCP of PPC business;

After the ANLYZD message that the SCP of step 521:PPC business receives in the step 520 to be sent, analyze this message, return the response message (anlyzd) of ANLYZD then to the mobile switching centre of called subscriber B, parameter action code in this anlyzd message is used to represent the result that the SCP of PPC business handles, if this result is end call, after then this anlyzd message was received by the mobile switching centre of called subscriber B, terminated call was handled, and finishes this Ring Back Tone service flow process; If this result is called out for continuing, after then this anlyzd message is received by the mobile switching centre of called subscriber B, execution in step 522 and subsequent step thereof;

Step 522: called subscriber B present located state is judged by the mobile switching centre of called subscriber B, if the called subscriber B free time, then execution in step 523 and subsequent step thereof, otherwise, execution in step 534;

Step 523: the mobile switching centre at called subscriber B place is to the Mobile Origination paging of called subscriber B, sets up the calling between the travelling carriage with called subscriber B, and the prompting that makes the travelling carriage of called subscriber B carry out for example ring is moved;

Step 524: the mobile switching centre at called subscriber B place sends Address Complete Message to server of color ring back tone service, the parameter indication current free time of called subscriber B in this message;

Step 525: server of color ring back tone service is analyzed from the Address Complete Message that step 524 is sent and is obtained the current free time of called subscriber B, the Ring Back Tone service information that customizes in advance according to called subscriber B, server of color ring back tone service is play the ring-back tone of customization to calling subscriber A, and send Address Complete Message to the mobile switching centre at calling subscriber A place, be connected with calling between the called subscriber B to set up calling subscriber A;

Step 526～step 528: called subscriber B off-hook is replied, the mobile switching centre at called subscriber B place sends TANSWER message to the SCP of PPC business, the operation of for example chargeing with the SCP of notice PPC business, and the mobile switching centre at called subscriber B place sends response message to server of color ring back tone service;

Step 529: after this response message that server of color ring back tone service is received in the step 528 to be sent, stop playing RBT to calling subscriber A, and send response message, normal talking between calling subscriber A and the called subscriber B to the mobile switching centre at calling subscriber A place;

Step 530～step 533: both call sides one side's on-hook, discharge the relaying speech channel between calling subscriber A and the called subscriber B, this time Ring Back Tone service finishes;

Step 534～step 536: performed step when step 534～step 536 is in busy condition for called subscriber B, the mobile switching centre at called subscriber B place plays busy tone or other prompt tone to the calling subscriber, discharge the relaying speech channel between the calling and called then, this time Ring Back Tone service finishes.

Embodiment 4:MSC does not support the CDRAA number of changing, and HLR supports different triggers to be signed in to different SCP; In embodiments of the present invention, because HLR supports different triggers to be signed in to different SCP, therefore, revise the CAMEL-Subscription-Information of called subscriber B in the HLR of its ownership, the SCP address of Initial_Termination trigger wherein is modified to the address of the SCP of Ring Back Tone service, thereby realize signatory Ring Back Tone service with this called subscriber B, user B all the other CAMEL-Subscription-Information in the HLR of its ownership still remain the CAMEL-Subscription-Information when only contracting the PPC business originally, after having carried out above-mentioned modification, referring to Fig. 6, realize that the present invention needs following steps:

Step 601: calling subscriber A calls out called subscriber B, because in embodiments of the present invention, calling subscriber A and called subscriber B are respectively in different mobile switching centres, and therefore, calling subscriber A starts called flow in the mobile switching centre at its place; In other embodiment of the present invention,, then start called flow in this mobile switching centre if calling subscriber A and called subscriber B are positioned at same mobile switching centre;

Step 602～step 603: the mobile switching centre at calling subscriber A place sends position requests (LOCREQ) message to the HLR of called subscriber B ownership, obtain the CAMEL-Subscription-Information of called subscriber B with request, after this HLR receives this request, search the CAMEL-Subscription-Information that obtains user B, and the CAMEL-Subscription-Information of user B is returned to the mobile switching centre of calling subscriber A by locreq message;

Step 604～step 606: called flow detects the Initial_Termination trigger, because the SCP address of this Initial_Tarmination trigger has been revised as the SCP address of Ring Back Tone service, therefore, after triggering this trigger, the mobile switching centre at calling subscriber A place sends ANLYZD message to the SCP of Ring Back Tone service, after the SCP of Ring Back Tone service receives this message, called subscriber B is carried out authentication, after authentication is passed through, the SCP of Ring Back Tone service sends SEARCH message to HLR, with the address of the SCP of the PPC business of acquisition request called subscriber B, HLR returns to the SCP address of the PPC business of called subscriber B by SEARCH response message (search) SCP of Ring Back Tone service;

Step 607～step 609: the address that the SCP of Ring Back Tone service returns in step 606 according to HLR, SCP to the PPC business transmits ANLYZD message received in step 604, after the PPC service control point receives ANLYZD message, return ANLYZD response message (anlyzd) to the SCP of Ring Back Tone service, the result of parameter action code (ActionCode) the expression PPC service control point in this message: if terminated call is wanted in the indication of parameter action code, then the SCP of Ring Back Tone service sends anlyzd message to the mobile switching centre at calling subscriber A place, indication mobile switching centre terminated call, and finish this Ring Back Tone service flow process; If the indication of parameter action code continues call treatment, then the SCP of Ring Back Tone service sends anlyzd message to the mobile switching centre of calling subscriber A, parameter action code indicating call in this message continues, and wherein comprises " Advanced_Termination " trigger in the parameter " list of triggers " in this message;

Step 610: the mobile switching centre at calling subscriber A place triggers the Advanced_Termination trigger, SCP to Ring Back Tone service sends ANLYZD message, to utilize the ADVANCED number of changing function, in following steps 611～step 617, realize issuing turning to number;

Step 611～step 614: Ring Back Tone service SCP copies mobile switching centre to obtain the roaming number of called subscriber B from HLR, its specific implementation is: Ring Back Tone service SCP sends LOCREQ message to the HLR of called subscriber B ownership, obtain the roaming number TLDN of called subscriber B with request, this HLR is by ROUTREQ message and routreq message, obtain the roaming number TLDN of called subscriber B from the mobile switching centre at called subscriber B place, this HLR utilizes LOCREQ response message (locreq) to return the roaming number TLDN of user B to Ring Back Tone service SCP;

Step 615～step 617: the SCP of Ring Back Tone service copies mobile switching centre to send ANLYZD message to the professional SCP of PPC, wherein, trigger is CDRAA, the SCP of PPC business returns anlyzd message, the result of parameter action code (ActionCode) the expression PPC service control point in this message: if terminated call is wanted in the action code indication, then the SCP of Ring Back Tone service sends anlyzd message to the mobile switching centre of calling subscriber A, mobile switching centre's terminated call of indication calling subscriber A finishes this Ring Back Tone service then; If the indication of the parameter action code in this message continues call treatment, then the SCP of Ring Back Tone service sends anlyzd message to mobile switching centre, the mobile switching centre of indication calling subscriber A continues to call out, and issue to the mobile switching centre of calling subscriber A by this anlyzd message and to turn to number: Ring Back Tone service access code+roaming number, to realize by the ADVANCED number of changing;

Step 618: the mobile switching centre at calling subscriber A place arrives server of color ring back tone service with call proceeding, its specific implementation is big: mobile switching centre's basis at calling subscriber A place is by the resulting number that turns to of step 617, the routing address that analyzes the Ring Back Tone service access code that turns in the number is a server of color ring back tone service, this mobile switching centre sends initial address message to server of color ring back tone service, to realize call proceeding to server of color ring back tone service, wherein, called number in this message is Ring Back Tone service access code+roaming number, and calling number is party A-subscriber's number;

Step 619: server of color ring back tone service is according to the Ring Back Tone service access code in the called number in the initial address message in the step 618 with as the number of the called subscriber B of original called party number, analyze called subscriber B and registered Ring Back Tone service, server of color ring back tone service sends initial address message to the mobile switching centre at called subscriber B place, called number in this message is roaming number TLDN, calling number is the number of calling subscriber A, thereby with the mobile switching centre of call proceeding to called subscriber B place;

Step 620: called subscriber B present located state is judged by the mobile switching centre of called subscriber B, if the called subscriber B free time, then execution in step 621 and subsequent step thereof, otherwise, execution in step 635;

Step 621: the mobile switching centre at called subscriber B place is to the Mobile Origination paging of called subscriber B, sets up the calling between the travelling carriage with called subscriber B, and the prompting that makes the travelling carriage of called subscriber B carry out for example ring is moved;

Step 622: the mobile switching centre at called subscriber B place sends Address Complete Message to server of color ring back tone service, the parameter indication current free time of called subscriber B in this message;

Step 623: server of color ring back tone service is analyzed from the Address Complete Message that step 622 is sent and is obtained the current free time of called subscriber B, the Ring Back Tone service information that customizes in advance according to called subscriber B, server of color ring back tone service is play the ring-back tone of customization to calling subscriber A, and send Address Complete Message to the mobile switching centre at calling subscriber A place, be connected with calling between the called subscriber B to set up calling subscriber A;

Step 624～step 626: called subscriber B off-hook is replied, the mobile switching centre at called subscriber B place sends TANSWER message to the SCP of PPC business, the operation of for example chargeing with the SCP of notice PPC business, and the mobile switching centre at called subscriber B place sends response message to server of color ring back tone service;

Step 627: after this response message that server of color ring back tone service is received in the step 626 to be sent, stop playing RBT to calling subscriber A, and send response message, normal talking between calling subscriber A and the called subscriber B to the mobile switching centre at calling subscriber A place;

Step 628～step 634: both call sides one side's on-hook, discharge the relaying speech channel between calling subscriber A and the called subscriber B, this time Ring Back Tone service finishes;

Step 635～step 640: performed step when step 635～step 640 is in busy condition for called subscriber B, the mobile switching centre at called subscriber B place plays busy tone or other prompt tone to the calling subscriber, discharge the relaying speech channel between the calling and called then, this time Ring Back Tone service finishes.

Embodiment 5:MSC supports the CDRAA number of changing, and HLR does not support different triggers to be signed in to different SCP; In embodiments of the present invention, because HLR does not support different triggers to be signed in to different SCP, therefore, in order to realize Ring Back Tone service, the SCP address in trigger that can only be all is set to the SCP address of Ring Back Tone service, thereby realize signatory Ring Back Tone service with this called subscriber B, and, on the SCP of Ring Back Tone service, be provided with, make that the message between the SCP of mobile switching centre and PPC business is all transmitted through the SCP of Ring Back Tone service, referring to Fig. 7, realize that the present invention needs following steps:

Step 701: calling subscriber A calls out called subscriber B, because in embodiments of the present invention, calling subscriber A and called subscriber B are respectively in different mobile switching centres, and therefore, calling subscriber A starts called flow in the mobile switching centre at its place; In other embodiment of the present invention,, then start called flow in this mobile switching centre if calling subscriber A and called subscriber B are positioned at same mobile switching centre;

Step 702～step 703: the mobile switching centre at calling subscriber A place sends position requests (LOCREQ) message to the HLR of called subscriber B ownership, obtain the CAMEL-Subscription-Information of called subscriber B with request, after this HLR receives this request, search the CAMEL-Subscription-Information that obtains user B, and the CAMEL-Subscription-Information of user B is returned to the mobile switching centre of calling subscriber A by locreq message;

Step 704～step 705: called flow detects the Initial_Termination trigger, because the SCP address of each trigger in this called flow has been revised as the SCP address of Ring Back Tone service, therefore, after triggering this trigger, the mobile switching centre at calling subscriber A place sends ANLYZD message to the SCP of Ring Back Tone service, after the SCP of Ring Back Tone service receives this message, this ANLYZD forwards is given the SCP of PPC business;

After the SCP of step 706～step 707:PPC business receives this ANLYZD message, called subscriber B is carried out authentication, after authentication is passed through, the SCP of PPC business is through the SCP of Ring Back Tone service, mobile switching centre to calling subscriber A returns analytical information response (anlyzd) message, and the mobile switching centre of indication calling subscriber A continues to call out;

Step 708～step 711: the mobile switching centre of calling subscriber A sends LOCREQ message to the HLR of called subscriber B, obtain the roaming number (TLDN) of called subscriber B in order to request, after the HLR of called subscriber B receives this message, mobile switching centre sends ROUTREQ message to the visit ground of called subscriber B, obtain the roaming number of called subscriber B from this visit ground mobile switching centre with request, this visit ground mobile switching centre distributes a TLDN for this called subscriber, and this TLDN returned to the ownership HLR of called subscriber B by routreq message, this HLR returns to the TLDN of called subscriber B by LOCREQ response message (locreq) mobile switching centre of calling subscriber A again;

Step 712: the mobile switching centre of calling subscriber A detects the CDRAA trigger, wherein, the SCP address of this CDRAA trigger has been modified to the address of the SCP of Ring Back Tone service, the mobile switching centre of calling subscriber A triggers this CDRAA trigger, send ANLYZD message according to the SCP address in this trigger to the SCP of Ring Back Tone service, thereby in following steps 713～step 715, utilize the CDRAA number of changing to realize issuing new routing number;

Step 713～step 714: the SCP of Ring Back Tone service after the SCP of PPC business receives ANLYZD message, returns the SCP of received ANLYZD forwards to the PPC business to ANLYZD response message (anlyzd) to the SCP of Ring Back Tone service; Wherein, the response message of the ANLYZD message that this anlyzd message is step 713, entrained parameter action code (ActionCode) is used to represent the result of the SCP of PPC business in this anlyzd message;

Step 715: after the SCP of Ring Back Tone service receives the anlyzd message that SCP sent of PPC business in the step 714, send ANLYZD response message (anlyzd) according to the parameter action code in this message to the mobile switching centre of calling subscriber A, mobile switching centre with indication calling subscriber A operates accordingly according to the result of the SCP of PPC business: if entrained parameter action code represents that the result of the SCP of PPC business serves as to continue call treatment in the anlyzd message of being sent in the step 714, then in this step, the SCP of Ring Back Tone service sends anlyzd message to the mobile switching centre of calling subscriber A, execution in step 716 and subsequent step thereof then, parameter action code in the anlyzd message that is sent in this step is used to indicate this mobile switching centre to continue to call out, and, also issue to the mobile switching centre of called subscriber A and turn to number: Ring Back Tone service access code+called subscriber's roaming number by this anlyzd message, wherein, the routing address of Ring Back Tone service access code is the address of server of color ring back tone service, and called subscriber's roaming number then is called subscriber's interim local directory number (TLDN); If entrained parameter action code represents that the result of the SCP of PPC business is a terminated call in the anlyzd message of being sent in the step 714, then in this step, the SCP of Ring Back Tone service sends anlyzd message to the mobile switching centre of calling subscriber A, indicating this mobile switching centre's terminated call, and finish whole call flows; Wherein, the anlyzd message in this step is the response message of the ANLYZD message of step 712;

The SCP of step 716～step 719:PPC business carries out the mutual of CCDIR and CCDIR response message (ccdir) through the SCP of Ring Back Tone service and the mobile switching centre of calling subscriber A, thereby utilizes the call supervision before this interacting message is realized conversation;

Step 720: the mobile switching centre of calling subscriber A arrives server of color ring back tone service according to the number that turns in the anlyzd message that is sent with call proceeding in step 715, its specific implementation is: the mobile switching centre of calling subscriber A is the address of server of color ring back tone service according to the routing address that turns to number analysis to go out the CRBT service access code in the anlyzd message that is sent in step 715, the mobile switching centre of calling subscriber A sends initial address message to server of color ring back tone service, called number in this message is Ring Back Tone service access code+called subscriber's roaming number, and the calling number in this message is the number of calling subscriber A;

Step 721: server of color ring back tone service is with the mobile switching centre of call proceeding to called subscriber B place, its specific implementation is: server of color ring back tone service is according to the Ring Back Tone service access code in the called number of the initial address message that step 720 sent and as the number of the user B of original called party number, analysis obtains user B and has registered Ring Back Tone service, then, server of color ring back tone service sends initial address message to party B-subscriber's visit ground mobile switching centre, called number in this message is the roaming number that turns to the called subscriber B in the number described in the step 715, the calling number of this message is the number of calling subscriber A, according to called number, this message is sent to the mobile switching centre at called subscriber B place, thereby with the mobile switching centre of call proceeding to called subscriber B place;

Step 722: the state of called subscriber B is judged by the mobile switching centre at called subscriber B place, if called subscriber B is in idle condition, and then execution in step 723 and subsequent step thereof, otherwise, execution in step 740;

Step 723～step 724: set up between the mobile switching centre at called subscriber B place and the called subscriber B and call out, the travelling carriage ring of called subscriber B, the mobile switching centre of called subscriber B is in idle condition by parameter entrained in this message to ringback tone server indication called subscriber B to the full message in server of color ring back tone service return address;

Step 725: the Address Complete Message that the mobile switching centre of server of color ring back tone service analysis called subscriber B returns, determine to obtain called subscriber B by analysis result and be in idle condition, the Ring Back Tone service information that this server of color ring back tone service customizes in advance according to called subscriber B, play the ring-back tone of customization to calling subscriber A, simultaneously, server of color ring back tone service sends Address Complete Message to the mobile switching centre at calling subscriber A place, to set up the calling between called subscriber B and the calling subscriber A via server of color ring back tone service;

Step 726～step 729: called subscriber B off-hook is replied, the visit ground mobile switching centre at called subscriber B place sends TANSWER message to the SCP of Ring Back Tone service, the SCP of Ring Back Tone service is with the SCP of this TANSWER forwards to the PPC business, SCP with notice PPC business begins to carry out the note expense, and the visit ground mobile switching centre at called subscriber B place sends response message to server of color ring back tone service;

Step 730: after server of color ring back tone service is received this response message, stop playing RBT to calling subscriber A, and, connecting the speech channel between calling subscriber A and the called subscriber B to calling subscriber A transmission response message, calling subscriber A and called subscriber B utilize this speech channel to converse;

Step 731～step 735: calling subscriber A or called subscriber B on-hook, the relaying speech channel between the SCP of release calling subscriber A or called subscriber B and PPC business; Be example with called subscriber B on-hook in the embodiment of the invention, called subscriber B on-hook, the mobile switching centre at called subscriber B place sends TDISCONNECT message to the SCP of Ring Back Tone service, the SCP of Ring Back Tone service is with the SCP of this TDISCONNECT forwards to the PPC business, after the SCP of PPC business received this TDISCONNECT message, the mobile switching centre of SCP to called subscriber B place of process Ring Back Tone service returned TDISCONNECT response message (tdisconnect);

Step 736～step 739: the mobile switching centre at called subscriber B place sends release message through the mobile switching centre of server of color ring back tone service to calling subscriber A place, the mobile switching centre at calling subscriber A place returns the release success message through the mobile switching centre of server of color ring back tone service to called subscriber B place, thereby discharge the relaying speech channel between calling subscriber A and the called subscriber B, then, finish this Ring Back Tone service flow process;

Among other embodiment of the present invention, when calling subscriber A on-hook, the process and the described process of above-mentioned steps 731～step 739 that discharge the relaying speech channel between calling subscriber and the called subscriber are similar;

Step 740～step 745: performed step when step 740～step 745 is in busy state for called subscriber B, after judging that in step 722 obtaining called subscriber B is in busy state, the mobile switching centre at called subscriber B place sends Address Complete Message through the mobile switching centre of server of color ring back tone service to calling subscriber A place, directly play busy tone or other prompt tone to calling subscriber A, then, utilize the release message of step 740～step 745 and the relaying speech channel between Release complete release calling subscriber A and the called subscriber B, finish this Ring Back Tone service flow process then.

Embodiment 6:MSC does not support the CDRAA number of changing, and HLR does not support different triggers to be signed in to different SCP; In embodiments of the present invention, owing to do not support the CDRAA number of changing, therefore adopt the ADVANCED number of changing to realize Ring Back Tone service; Because HLR does not support different triggers to be signed in to different SCP, therefore, in order to realize Ring Back Tone service, SCP address in trigger that can only be all is set to the SCP address of Ring Back Tone service, thereby realizes the signatory Ring Back Tone service with this called subscriber B, and, on the SCP of Ring Back Tone service, be provided with, make the message between the SCP of mobile switching centre and PPC business all transmit,, realize that the present invention needs following steps referring to Fig. 8 through the SCP of Ring Back Tone service:

Step 801: calling subscriber A calls out called subscriber B, because in embodiments of the present invention, calling subscriber A and called subscriber B are respectively in different mobile switching centres, and therefore, calling subscriber A starts called flow in the mobile switching centre at its place; In other embodiment of the present invention,, then start called flow in this mobile switching centre if calling subscriber A and called subscriber B are positioned at same mobile switching centre;

Step 802～step 803: the mobile switching centre at calling subscriber A place sends position requests (LOCREQ) message to the HLR of called subscriber B ownership, obtain the CAMEL-Subscription-Information of called subscriber B with request, after this HLR receives this request, search the CAMEL-Subscription-Information that obtains user B, and the CAMEL-Subscription-Information of user B is returned to the mobile switching centre of calling subscriber A by locreq message;

Step 804～step 805: called flow detects the Initial_Termination trigger, because the SCP address of this Initial_Termination trigger has been revised as the SCP address of Ring Back Tone service, therefore, after triggering this trigger, the mobile switching centre at calling subscriber A place sends ANLYZD message to the SCP of Ring Back Tone service, after the SCP of Ring Back Tone service receives this message, called subscriber B is carried out authentication, after authentication is passed through, the SCP of Ring Back Tone service is masked as cleared condition and judges this time triggering and need carry out Ring Back Tone service by triggering from one's body Ring Back Tone service, at first the Ring Back Tone service on himself is triggered flag set, to represent that this Ring Back Tone service SCP carries out Ring Back Tone service, then, mobile switching centre to calling subscriber A place returns anlyzd message, comprises the Advanced_Termination trigger in the list of triggers parameter in this message;

Step 806～step 807: the mobile switching centre at calling subscriber A place triggers the Advanced_Termination trigger, SCP to Ring Back Tone service sends ANLYZD message, after the SCP of Ring Back Tone service receives this message, utilize the ADVANCED number of changing, issue to mobile switching centre and to turn to number, this turns to number to be: the number (MDN) of Ring Back Tone service access code+called subscriber B;

Step 808: the mobile switching centre at calling subscriber A place is according to the number that turns to that is issued in the step 807, server of color ring back tone service is arrived in call proceeding, its specific implementation is: the mobile switching centre at calling subscriber A place is a server of color ring back tone service according to the routing address that turns to number analysis to go out Ring Back Tone service access code wherein, this mobile switching centre sends initial address message to server of color ring back tone service, called number in this message is the number of Ring Back Tone service access code+called subscriber B, calling number is the number of calling subscriber A, utilizes this initial address message that server of color ring back tone service is arrived in call proceeding;

Step 809: server of color ring back tone service is according to the Ring Back Tone service access code in the called number of the initial address message that is sent in the step 808 with as the number of the called subscriber B of original called party number, analysis obtains called subscriber B and has registered Ring Back Tone service, then, server of color ring back tone service sends initial address message to the mobile switching centre at called subscriber B place, call proceeding is arrived the mobile switching centre at called subscriber B place, wherein, the called number of this initial address message is the number of called subscriber B, and calling number is the number of calling subscriber A;

Step 810～step 811: the mobile switching centre at called subscriber B place obtains the CAMEL-Subscription-Information of called subscriber B by the response message (locreq) of LOCREQ message and LOCREQ message from the HLR of called subscriber B;

Step 812: the mobile switching centre at called subscriber B place triggers the Initial_Termination trigger in the CAMEL-Subscription-Information, sends ANLYZD message to the SCP of Ring Back Tone service;

Step 813: after the SCP of Ring Back Tone service receives this ANLYAD message, to called authentication, after authentication is passed through, because the SCP in step 804 Colorful Ring Service triggers flag set to this called subscriber's Ring Back Tone service, therefore, the SCP of Ring Back Tone service triggers the PPC operation flow of called subscriber B, at first Ring Back Tone service is triggered the sign zero clearing, then, the SCP of Ring Back Tone service sends SEARCH message to the HLR of called subscriber B, with the SCP address of the PPC business of acquisition request called subscriber B;

Step 814: the HLR of called subscriber B returns the SCP address of the PPC business of called subscriber B to the SCP of Ring Back Tone service by the response message (search) of SEARCH;

Step 815～step 816: the SCP address of the PPC business that the SCP of Ring Back Tone service returns according to step 814, transmit in the received ANLYZD message of step 804 to the SCP of PPC business, after the SCP of PPC business receives this message, return the response message (anlyzd) of ANLYZD to the SCP of Ring Back Tone service, the action code parameter of this anlyzd message is used to represent the result of the SCP of PPC business;

Step 817: if the action code parametric representation terminated call in the step 816 in the anlyzd message, then the SCP of Ring Back Tone service sends anlyzd message to the mobile switching centre at calling subscriber A place, indicate this mobile switching centre's terminated call to handle, finish this Ring Back Tone service then; If the action code parametric representation in the step 816 in the anlyzd message continues to call out, then the SCP of Ring Back Tone service sends anlyzd message to the mobile switching centre at calling subscriber A place, indicate this mobile switching centre to finish to continue call treatment, execution in step 818 and subsequent step thereof then;

Step 818～step 819: the mobile switching centre at called subscriber B place sends LOCREQ message to the HLR of called subscriber B ownership, obtain the roaming number of called subscriber B with request, this HLR obtains sending the mobile switching centre of this message according to this LOCREQ message judgement and the mobile switching centre at the current place of called subscriber B is same mobile switching centre, this HLR returns the response message (locreq) of LOCREQ to the mobile switching centre at called subscriber B place, mobile switching centre's sign (MSCID) parameter that comprises the mobile switching centre at called subscriber B place in this locreq message, it is identical with the MSCID at the called subscriber B place that obtains from HLR that mobile switching centre analyzes self MSCID, directly is that called subscriber B distributes a TLDN;

Step 820～step 821: the mobile switching centre at called subscriber B place detects the CDRAA trigger, because the SCP address of this CDRAA trigger correspondence is the SCP address of Ring Back Tone service, therefore, after triggering this trigger, the mobile switching centre at called subscriber B place sends ANLYZD message to the SCP of Ring Back Tone service, after the SCP of Ring Back Tone service receives this message, this forwards is given the SCP of PPC business;

After the ANLYZD message that the SCP of step 822～step 823:PPC business receives in the step 821 to be sent, analyze this message, pass through the SCP of Ring Back Tone service then, return the response message (anlyzd) of ANLYZD to the mobile switching centre of called subscriber B, parameter action code in this anlyzd message is used to represent the result that the SCP of PPC business handles, if this result is end call, after then this anlyzd message is received by the mobile switching centre of called subscriber B, terminated call is handled, and finishes this Ring Back Tone service flow process; If this result is called out for continuing, after then this anlyzd message is received by the mobile switching centre of called subscriber B, execution in step 824 and subsequent step thereof;

Step 824: called subscriber B present located state is judged by the mobile switching centre of called subscriber B, if the called subscriber B free time, then execution in step 825 and subsequent step thereof, otherwise, execution in step 838;

Step 825: the mobile switching centre at called subscriber B place is to the Mobile Origination paging of called subscriber B, sets up the calling between the travelling carriage with called subscriber B, and the prompting that makes the travelling carriage of called subscriber B carry out for example ring is moved;

Step 826: the mobile switching centre at called subscriber B place sends Address Complete Message to server of color ring back tone service, the parameter indication current free time of called subscriber B in this message;

Step 827: server of color ring back tone service is analyzed from the Address Complete Message that step 826 is sent and is obtained the current free time of called subscriber B, the Ring Back Tone service information that customizes in advance according to called subscriber B, server of color ring back tone service is play the ring-back tone of customization to calling subscriber A, and send Address Complete Message to the mobile switching centre at calling subscriber A place, be connected with calling between the called subscriber B to set up calling subscriber A;

Step 828～step 831: called subscriber B off-hook is replied, the mobile switching centre at called subscriber B place sends TANSWER message to the SPC of Ring Back Tone service, the SCP of Ring Back Tone service gives this TANSWER forwards the SCP of PPC business, the operation of for example chargeing with the SCP of notice PPC business, and the mobile switching centre at called subscriber B place sends response message to server of color ring back tone service;

Step 832: after this response message that server of color ring back tone service is received in the step 831 to be sent, stop playing RBT to calling subscriber A, and send response message, normal talking between calling subscriber A and the called subscriber B to the mobile switching centre at calling subscriber A place;

Step 833～step 838: both call sides one side's on-hook, discharge the relaying speech channel between calling subscriber A and the called subscriber B, this time Ring Back Tone service finishes;

Step 839～step 841: performed step when step 839～step 841 is in busy condition for called subscriber B, the mobile switching centre at called subscriber B place plays busy tone or other prompt tone to the calling subscriber, discharge the relaying speech channel between the calling and called then, this time Ring Back Tone service finishes.

The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. realize the method for Ring Back Tone service in the code division multiple access system, it is characterized in that the address of the corresponding trigger in the user signing contract information of the IN service of will having contracted in advance is from the address that the IN service SCP address is revised as Ring Back Tone service SCP, this method comprises:

2. method according to claim 1 is characterized in that, described corresponding trigger comprises that at least called routing address can use trigger;

Steps A comprises:

3. method according to claim 2 is characterized in that, steps A 11 comprises:

4. method according to claim 2 is characterized in that, described corresponding trigger is whole triggers, and steps A 11 comprises:

5. method according to claim 2 is characterized in that, steps A 12 comprises:

6. method according to claim 5 is characterized in that, further comprises the action code of handling the IN service result in order to expression IN service SCP described in the steps A 122 in the analyzing responding message, if this action code indication continues to call out, then carry out described steps A 13, otherwise, process ends.

7. method according to claim 1 is characterized in that, described corresponding trigger comprises that at least called routing address can use trigger;

8. method according to claim 7 is characterized in that, steps A 21 comprises:

9. method according to claim 7 is characterized in that, steps A 22 comprises:

10. method according to claim 1 is characterized in that, described corresponding trigger comprises the initial terminal trigger at least;

Steps A comprises:

11. method according to claim 10 is characterized in that, steps A 31 comprises:

Steps A 33 comprises:

12. method according to claim 10 is characterized in that, described corresponding trigger is whole triggers, and steps A 31 comprises:

Steps A 33 comprises:

13. method according to claim 1 is characterized in that, described corresponding trigger comprises the initial terminal trigger at least;

Steps A comprises:

14. method according to claim 13 is characterized in that, steps A 41 comprises:

15. method according to claim 13 is characterized in that, steps A 42 comprises:

16. method according to claim 1 is characterized in that, step B comprises:

17. method according to claim 16 is characterized in that, if called subscriber's current state is busy, this method further comprises:

18. method according to claim 1 is characterized in that, after the step B, this method further comprises:

19. method according to claim 18 is characterized in that, after the step C, this method further comprises:

20. method according to claim 1 is characterized in that, described IN service comprises CDMA prepayment service or centrex service.