CN102404295A

CN102404295A - Display method and display system of early media in session

Info

Publication number: CN102404295A
Application number: CN2010102838091A
Authority: CN
Inventors: 高扬; 李世涛
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2010-09-15
Filing date: 2010-09-15
Publication date: 2012-04-04
Anticipated expiration: 2030-09-15
Also published as: CN102404295B; WO2012034423A1

Abstract

The invention discloses a display method of early media in a session, which includes: a CAT AS of a calling party determines whether a 18X response of a called party of a received session is a first 18X response with an early media session description protocol (SPD) request of the session, if yes, a timer is started. When the CAT AS receives the 18X response with the early media SDP request of another called party of the session within a timing period of the timer, the CAT AS refuses all early media SDP requests of the session after the timer is time-out, and the 18X response with the early media SDP request provided by the CAT AS is generated for the calling party and sent to the calling party. The invention simultaneously discloses a display system of early media in the session. The display method and the display system of early media in the session provide better early media experience for a calling user.

Description

Method and system for playing early media in session

Technical Field

The present invention relates to an early media playing technology, and in particular, to a method and a system for playing early media in a session of a multimedia Subsystem (IMS).

Background

In the prior art, a color ring service can be implemented in an IP Multimedia Subsystem (IMS) network, that is, when a calling subscriber makes a call to a called subscriber, the called subscriber can hear or see a color ring played by the calling subscriber instead of a simple prompt tone played by a switch.

Fig. 1 is a flowchart of a coloring ring back tone service playing in an IMS network, and as shown in fig. 1, the coloring ring back tone playing service specifically includes the following steps:

step 101, calling user UA1 sends a call initiation request to called user UA 2;

step 102, after receiving the call initiation request, a Serving call session Control Function entity (S-CSCF) of the called network triggers the call initiation request to a Customized ring back tone Server (CAT AS, Customized alerting tone Application Server) of the called user according to a subscription rule of the called user UA 2;

step 103 to step 104, CAT AS routes the call request to UA2 via S-CSCF according to the address information of called user UA 2;

step 105 to step 106, the CAT AS replies 18X response to the received originating request to the calling user UA1, where the 18X response carries the polyphonic ringtone media information, and at this time, a session 1 has been established between UA1 and CAT AS;

step 107 to step 108, after receiving the call initiation request, UA2 replies 18X response to main teaching UA1, where the media information required for normal call is carried, and at this time, session 2 is established between UA1 and UA 2;

after the polyphonic ringtone media is negotiated, the CAT AS can play the polyphonic ringtone media for the calling user UA 1.

Step 109, called user UA2 answers the call, and sends 200OK response;

step 110, the called S-CSCF triggers 200OK to CATAS according to the signing rule;

step 111, CAT AS stops playing the color ring after receiving the 200OK, and forwards the 200OK to S-CSCF;

step 112, the S-CSCF sends the 200OK response to calling UA 1;

in steps 113 to 114, calling UA1 sends ACK to the called party after receiving the 200 OK;

in the prior art, a forking (forking) mode is adopted, and two dialogues are established in the session establishment process, one is a polyphonic ringtone negotiation dialog and the other is a normal media negotiation dialog.

In the existing IMS architecture, there is a case of one number and multiple phones, that is, multiple terminals share one number, and each terminal signs a different service. Fig. 2 is a flowchart of a plurality of early media that may appear in the prior art, and as shown in fig. 2, the method specifically includes the following steps:

step 201, a calling user UE #1 initiates a call request through an IMS network;

step 202, after receiving the call initiation request, the S-CSCF of the called network finds that the called number is shared by multiple terminals, and then sends the call request to different terminals (UA2, UA3), at this time, the message is sent to UA 2;

step 203, according to the subscription rule of the UA2, the origination request triggers CAT AS2 of the UA 2;

step 204, the S-CSCF sends the call request to the UA2 according to the address information of the UA 2;

step 205 to step 206, and the S-CSCF triggers the call request to the CATAS3 of the UA3 according to the subscription information of the UA 3;

step 207, the S-CSCF sends the call request to the UA3 according to the address information of the UA 3;

step 208 to step 209, the CAT AS2 sends an 18X response to the UA1 of the calling user, where the 18X response carries the polyphonic ringtone media information signed by UA2, and at this time, a session 1 between UA1 and CATAS2 is established;

step 210 to step 211, the called UA2 sends an 18X response to the calling UA1, where the response carries normal media information, and at this time, a dialog 2 between UA1 and UA2 is established;

at this time, the CAT AS2 can play the customized ring back tone media of UA2 to UA 1;

step 211 to step 213, the CAT AS3 sends 18X response to the caller UA1, carrying the polyphonic ringtone media information signed by UA3, and at this time, establishes a dialog 3 between UA1 and CAT AS 3;

step 214 to step 215, the called UA3 sends 18X response to the calling UA1, where the response carries normal media information, and at this time, establishes dialog 4 between UA1 and UA 3;

at this time, the CATAS3 can play the customized ring back tone media of UA3 to UA 1;

because the bifurcated process is synchronous, namely the color ring of the UA2 and the color ring of the UA3 are not in sequence, the color ring and the color ring can reach at the same time;

step 216, here if UA2 answers, then a 200OK answer message is sent to calling UA 1;

step 217, the S-CSCF will send the 200OK response to CATAS2, and after receiving the 200OK response, CATAS2 stops playing the coloring ring back tone;

step 218 to step 219, the S-CSCF sends the 200OK to the calling UA2 to complete the call;

step 220 to step 221, after calling UA1 receives 200OK, it sends ACK to UA 2;

step 222, after receiving the 200OK response of step 217, the S-CSCF sends BYE to UA3, and ends the call to UA3, and according to the subscription information of UA3, the message is sent to CAT AS3, so that CAT AS3 ends the playing of the color ring;

step 223 to step 224, the S-CSCF sends BYE to UA3, ending the UA3 call.

For the case shown in fig. 2, when the shared number receives a call initiation request, a fork is generated, so that the call request is sent to different terminals, so that each terminal receives the call request and rings, and when one of the terminals answers, the other terminal stops ringing. In this scenario, since each terminal may subscribe to different services, such as different polyphonic ring services, in this case, the caller will receive multiple early media related to polyphonic ring, and for some terminals with simpler functions, a terminal that can only process one media will generate errors because it cannot process multiple media streams, but for some terminals that can process multiple media streams, it will generate confusion because they receive multiple media streams at the same time, and play ring tones that are mixed together and hard to hear.

Disclosure of Invention

In view of the above, the present invention provides a method and a system for playing early media in a session, which can provide a unique early media for a calling party when a plurality of terminals of a called party in the session share a same number and sign a plurality of early media.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a playing method of early media in a session comprises the following steps:

the CAT AS of the calling party judges whether the received 18X response of the called party of the session is the first 18X response carrying the early media SDP request of the session, and if so, a timer is started;

and when the CAT AS receives 18X responses carrying early media SDP requests of other called parties of the session in the timing period of the timer, the CAT AS rejects all the early media SDP requests of the session after the timer is overtime, generates 18X responses carrying the early media SDP requests provided by the CAT AS for the calling party, and sends the 18X responses to the calling party.

Preferably, the method further comprises:

and the CAT AS determines that the 18X responses carrying the early media SDP request of other called parties of the session are not received within the timing period of the timer, and forwards the received first 18X response carrying the early media SDP request to the calling party after the timer is overtime.

Preferably, the rejecting all early media SDP requests of the session after the timer expires is specifically:

the CAT AS sends PRACK information to other CATAS which send 18X response carrying early media SDP request to itself, and rejects the early media SDP request of other CAT AS.

Preferably, the CAT AS receives 18X responses carrying an early media SDP request from other called parties of the session within a timing period of the timer, and belongs to other call branches of the session.

Preferably, the early media is color ring, color image, electronic business card or display text.

A playing system of early media in conversation comprises a judging unit, a starting unit, a determining unit, a rejecting unit, a generating unit and a sending unit; wherein,

a judging unit, configured to judge whether an 18X response of a called party of a session received by a CAT AS of a calling party is a first 18X response carrying an early media SDP request of the session, and if so, trigger a starting unit;

the starting unit is used for starting the set timer;

a determining unit, configured to trigger a rejecting unit when determining that other 18X responses carrying an early media SDP request of the session are received within a timing period of the timer;

a rejecting unit, configured to reject all early media SDP requests of the session after the timing is overtime;

a generating unit, configured to generate an 18X response carrying the early media SDP request provided by the CAT AS for the calling party;

a sending unit, configured to send the 18X response generated by the generating unit to the calling party.

Preferably, the system further comprises:

a forwarding unit, configured to forward, when the determining unit further determines that the CAT AS does not receive other 18X responses carrying an early media SDP request of the session within the timing period of the timer, the received first 18X response carrying the early media SDP request to the calling party after the timing is out of time.

Preferably, the sending unit further sends a PRACK message to other CAT AS sending 18X response carrying the early media SDP request to the CAT AS, and rejects the early media SDP requests of other CAT AS.

When a calling party calls a plurality of terminals sharing the same number, the plurality of called terminals may sign different early media services, so that the calling party may receive the plurality of early media services, and when the plurality of early media are played simultaneously, the effect of receiving the early media by the calling party may be relatively poor. In the invention, when CAT AS of a calling party receives an 18X response which is sent by a called party and carries an early media SDP request, firstly, whether the currently received 18X response is the first 18X response of a current session is judged, if yes, a set timer is started, the received first 18X response is not sent temporarily in the timing period of the timer, but whether other 18X responses carrying the early media SDP request are received is judged in the timing period of the timer, when the other 18X responses carrying the early media SDP request are not received, the early media which is currently provided by the called party is only one, and the received first 18X response is directly forwarded to the calling party; when other 18X responses carrying the early media SDP request are received in the timer period, the fact that the called party currently provides more than one early media means that if all the early media are provided for the calling party, overlapping of early media playing of the calling party can be caused, and playing effect of the early media of the calling party can be affected. The invention can provide better early media experience for the calling user and can ensure the normal playing of the early media.

Drawings

FIG. 1 is a flow chart of coloring ring back tone service playing in an IMS network;

FIG. 2 is a flow diagram of the prior art in which multiple early media may appear;

FIG. 3 is a flowchart illustrating a method for playing early media in a session according to a first embodiment of the present invention;

FIG. 4 is a flowchart of a second embodiment of a method for playing early media in a session according to the present invention;

fig. 5 is a schematic structural diagram of the playing system of early media in conversation according to the present invention.

Detailed Description

In the invention, the strategy of the color ring playing of the calling party is mainly set in the CAT AS of the calling party, that is, after receiving the 18X response carrying the early media SDP request from the called party, first determining whether the 18X response is the first 18X response of the current session, if so, first starting a preset timer, and not sending the received first 18X response within the timing period of the timer, but after the timer is overtime, whether other 18X responses carrying the early media SDP request are received is judged, if further 18X responses are also received, carrying an early media SDP request, all early media received is rejected, but instead re-determines the early media for the calling party at the calling party's CAT AS itself, and re-sends the 18X response sent to the calling party, which carries the 18X response to the early media SDP request of the calling party's CAT AS. In the invention, when the CAT AS of the calling party determines the early media for the calling party again, the early media to be played can be determined for the calling party according to the subscription information of the CAT AS of the calling party and the calling party, or one early media to be played can be determined for the calling party in the CATAS of the calling party.

The duration of the timer can be set according to the requirement, such as 0.5s, 200ms or 100 ms.

The early media are color ring, color image, electronic name card or display text, etc.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings by way of examples.

Fig. 3 is a flowchart of a first embodiment of a method for playing early media in a session, as shown in fig. 3, the method for playing early media in a session specifically includes the following steps:

step 301, a calling user UA1 initiates a call request through an IMS network, and according to a subscription rule of the calling user, the call request is sent to a calling CAT AS 1;

step 302, the CATAS1 sends the call request to the called network;

step 303, after receiving the call initiation request, the S-CSCF of the called network finds that the called number is shared by multiple terminals, and then sends the call request to different terminals (UA2, UA3), at this time, the message is sent to UA 2;

step 304, according to the subscription rule of UA2, the origination request triggers CAT AS2 of UA 2;

step 305, the S-CSCF sends the call request to UA2 according to the address information of UA 2;

step 306 to step 307, and the S-CSCF triggers the call request to the CATAS3 of UA3 according to the subscription information of UA 3;

step 308, the S-CSCF sends the call request to UA3 according to the address information of UA 3;

step 309 to step 310, the CAT AS2 sends 18X response to the calling UA1, where the 18X response carries the polyphonic ringtone media information signed by UA2, and at this time, a session 1 between UA1 and CAT AS2 is established;

step 311, after the CAT AS1 receives the 18X response, it determines whether it is the first 18X response carrying the polyphonic ringtone early media SDP request received in the calling process, if so, a timer is started;

step 312 to step 314, the called UA2 sends 18X response to the calling UA1, where the 18X response carries normal media information, and at this time, session 2 between UA1 and UA2 is established;

step 315 to step 316, the CAT AS3 sends an 18X response to the caller UA1, where the 18X response carries the polyphonic ringtone early media SDP request information signed by UA3, and session 3 is adopted;

step 317, in the time set by the timer, AS CAT AS1 receives an 18X response and carries the SDP request of the CRBT early media, CAT AS1 considers that the called party has the fork of the early media;

step 318, the CAT AS1 sends 18X response to the calling user UE1, carries the polyphonic ringtone early media SDP request provided by CAT AS1, and adopts a new dialog 5;

step 319, the calling subscriber sends PRACK request to CAT AS1 to confirm receiving the early media SDP request, and carries SDP answer, including user information;

step 320, after CAT AS1 receives the PRACK request, playing the unified color ring tone provided by calling CAT AS1 for the calling user, and simultaneously sending the 200OK response of PRACK to the calling user UE 1;

step 321 to step 322, the CATAS1 sends the color ring provided by the PRACK reject CAT AS2 to the CATAS2 of the UE2 at the same time, where the color ring carries the SDP answer and sets the ports of all media to 0;

step 323 to step 324, after receiving PRACK, CAT AS2 returns 200OK to CAT AS 1;

step 325 to step 326, the CATAS1 sends the color ring back tone provided by the PRACK rejection CATAS3 to the CATAS3 of the UE3 at the same time, wherein the color ring back tone carries the SDP answer, and sets the ports of all media to 0;

step 327 to step 328, after receiving PRACK, CATAS3 returns 200OK to CATAS 1;

step 329 to step 331, the called UA3 sends an 18X response to the calling UA1, carrying normal media information, and at this time, establishes a dialog 4 between UA1 and UA 3;

step 332, here if UA2 answers, send a 200OK answer message to calling UA 1;

step 333 to step 335, the S-CSCF will send the 200OK response to CAT AS1, and CAT AS1 will stop playing the ring back tone after receiving the 200OK response;

step 336, the CATAS1 sends the 200OK to the caller UA2, i.e. connects the call;

step 337 to step 339, after calling UA1 receives 200OK, it sends ACK to UA 2;

step 340 to step 342, when S-CSCF receives 200OK response from step 331, it sends BYE to UA3, and ends the call to UA 3.

Fig. 4 is a flowchart of a first embodiment of a playing method of an early media in a session, as shown in fig. 4, the playing method of the early media in the session specifically includes the following steps:

step 401, a calling user UA1 initiates a call request through an IMS network, and according to a subscription rule of the calling user, the call request is sent to a CATAS1 of the calling user;

step 402, CAT AS1 sends the call request to the called network;

step 403, after the S-CSCF of the called network receives the call initiation request, the called number is not shared by multiple terminals at this time, and no bifurcation occurs, so that the call request is sent to UA 2;

step 404, according to the subscription rule of UA2, the origination request triggers CAT AS2 of UA 2;

step 405, the S-CSCF sends the call request to UA2 according to the address information of UA 2;

step 406 to step 407, the CAT AS2 sends an 18X response to the calling UA1, where the 18X response carries the polyphonic ringtone media information signed by UA2, and at this time, a dialog 1 is generated;

step 408, after the CATAS1 receives the 18X response, it is determined whether the 18X response carrying the polyphonic ringtone early media SDP request received in the calling process is the first one, and if so, a timer is started;

step 409 to step 411, the called UA2 sends an 18X response to the calling UA1, carrying normal media information, and at this time, establishes a dialog 2 between UA1 and UA 2;

step 412, if the CAT AS1 does not receive any other 18X response carrying the polyphonic ringtone early media SDP request within the set time, the called party is considered to have no early media fork;

step 413, the CAT AS1 forwards the 18X response received in step 407;

step 414, after receiving the 18X response, the calling UE1 sends a PRACK request to the called UE, and carries an SDP answer containing user information;

step 415 to step 416, CAT AS1 forwards the PRACK to CAT AS2, at which time CAT AS2 can play the color ring back tone to calling user UE 1;

step 417 to step 419, while CAT AS2 sends 200OK to the calling subscriber;

step 420, UA2 answers, then sends 200OK answer message to calling UA 1;

step 421, the S-CSCF will send the 200OK response to the CATAS2, and the CATAS2 will end the playing of the ring back tone after receiving the 200OK response;

step 422 to step 424, the S-CSCF sends the 200OK to caller UA1, and the call is completed if it is done;

in step 425 to step 427, after calling UA1 receives the 200OK, it sends an ACK to UA 2.

Although the present invention is described by taking a color ring as an example, those skilled in the art should understand that the above technical solution can also be implemented by replacing the color ring with a color image. Moreover, the early media of the invention is not limited to the color ring and ring, but also can be other early media such as electronic business cards, display characters and the like.

Fig. 5 is a schematic structural diagram of the playing system of the early media in conversation according to the present invention, and as shown in fig. 5, the playing system of the early media in conversation according to the present invention includes a judging unit 50, a starting unit 51, a determining unit 52, a rejecting unit 53, a generating unit 54, and a sending unit 55; wherein,

a judging unit 50, configured to judge whether an 18X response of a called party of a session received by a CAT AS of a calling party is a first 18X response carrying an early media SDP request of the session, and if so, trigger a starting unit 51, and not forward the 18X response to the calling party;

a starting unit 51 for starting a setting timer;

a determining unit 52, configured to trigger a rejecting unit when determining that other 18X responses carrying an early media SDP request of the session are received within a timing period of the timer;

a rejecting unit 53, configured to reject all early media SDP requests of the session after the timing is timed out;

a generating unit 54, configured to generate an 18X response carrying the early media SDP request provided by the CAT AS for the calling party;

a sending unit 55, configured to send the 18X response generated by the generating unit to the calling party.

On the basis of the playing system of the early media in conversation shown in fig. 5, the playing system of the early media in conversation of the present invention further includes: a forwarding unit (not shown) configured to, when the determining unit 52 further determines that the CAT AS does not receive other 18X responses carrying an early media SDP request of the session within the timing period of the timer, forward the received first 18X response carrying the early media SDP request to the calling party after the timing is expired.

The sending unit 55 further sends a PRACK message to other CAT AS sending 18X response carrying the early media SDP request to the CAT AS, and rejects the early media SDP requests of other CAT AS.

And the CAT AS receives 18X responses carrying early media SDP requests of other called parties of the session in the timing period of the timer, and the responses belong to other call branches of the session.

It should be understood by those skilled in the art that the playing system of the early media in conversation according to the present invention is designed to implement the aforementioned playing method of the early media in conversation according to the present invention, and the implementation functions of the processing units described above can be understood by referring to the aforementioned related description of the method of upstream feedback. The functions of each processing unit may be implemented by a program running on a processor, or may be implemented by specific logic circuits.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. A method for playing early media in a session, the method comprising:

a customized color ring back tone server (CATAS) of a calling party judges whether a received 18X response of a called party of a session is a first 18X response carrying an early media Session Description Protocol (SDP) request of the session, and if so, a timer is started;

2. The method of claim 1, further comprising:

3. The method of claim 1, wherein said rejecting all early media SDP requests of the session after the timer expires is specifically:

4. The method of claim 1 wherein the CAT AS receives 18X responses carrying early media SDP requests from other called parties of the session within the timing period of the timer, belonging to other call legs of the session.

5. The method of any one of claims 1 to 4, wherein the early media is a color ring, a color image, an electronic business card, or a display text.

6. The playing system of the early media in the conversation is characterized by comprising a judging unit, a starting unit, a determining unit, a rejecting unit, a generating unit and a sending unit; wherein,

the starting unit is used for starting the set timer;

7. The system of claim 6, further comprising:

8. The system of claim 6 wherein the sending unit further sends a PRACK message to other CAT AS sending 18X responses to the CAT AS carrying the early media SDP request, rejecting the early media SDP requests of other CAT AS.

9. The system of claim 6 wherein the CAT AS receives 18X responses carrying early media SDP requests from other called parties of the session within the timer period belonging to other call legs of the session.

10. The system of any one of claims 6 to 9, wherein the early media is a color ring, a color image, an electronic business card, or a display text.