CN1960526A

CN1960526A - Method and system for implementing service of multiparty communication

Info

Publication number: CN1960526A
Application number: CN 200510119516
Authority: CN
Inventors: 罗龙
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2005-11-03
Filing date: 2005-11-03
Publication date: 2007-05-09
Anticipated expiration: 2025-11-03
Also published as: CN1960526B

Abstract

The system thereof comprises: a control function (CF) entity and a participating function (PF) entity. The CF entity sends the media processing strategy to PF entity; PF entity processes the media stream sent from terminal according to the received media processing strategy. In the invention, CF entity can control the multipartite communication by interacting signaling with PF entity such as: the media stream is only transmitted between PFs, and there is no need to relay the media stream through CF entity.

Description

A kind of method and system of realizing multiway telecommunication service

Technical field

The present invention relates to mobile communication technology, particularly relate to a kind of method and system of realizing multiway telecommunication service.

Background technology

Along with the fast development of mobile communication technology, multiway telecommunication service is extensive use of by people.In multiway telecommunication service, system side is provided with and participates in server (PF) and carry out central controlled Control Server (CF), and each in the multi-party communication is with being linked on the CF entity by the PF entity under self per family.

When carrying out multi-party communication, the user is sent to PF entity under self with self signaling or Media Stream, and this PF entity is sent to the CF entity with received signaling or Media Stream again, is controlled the process of follow-up transmission signaling or Media Stream by the CF entity.Such as, in multi-party communication, the PF entity of a user's speaking request under it is sent to the CF entity of carrying out centralized control functions in this multi-party communication, whether allows this user's speech by the decision of CF entity.For another example, in multi-party communication, the Media Stream of user's generation at first is sent to the PF entity under it, this PF entity is sent to this Media Stream the CF entity of carrying out centralized control functions again, carry out medium by the CF entity and transmit control, that is to say, this user's Media Stream is sent to the PF entity under other user in this multi-party communication by the CF entity.

By above description as can be seen, in existing multiway telecommunication service, all signalings and Media Stream all must be sent to the CF entity, by the CF entity signaling and the Media Stream that receive are controlled the PF entity that is forwarded to follow-up correspondence again.And do not carry out the Signalling exchange of any relevant medium processing policy between CF entity and the PF entity, that is to say, the CF entity can't be by indicating the processing policy of PF entity to Media Stream with the signalling interactive process of PF entity, therefore, greatly reduce the flexibility that multiway telecommunication service is realized, reduced the QoS of system.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of method that realizes multiway telecommunication service, another object of the present invention is to provide a kind of system that realizes multiway telecommunication service, to increase the flexibility that multiway telecommunication service is realized.

In order to achieve the above object, technical scheme of the present invention is achieved in that

A kind of method that realizes multiway telecommunication service, this method comprises:

A, CF entity are sent to the PF entity with the medium processing policy;

B, PF entity handle the Media Stream of self terminal according to the medium processing policy that receives.

Described medium processing policy is handled address information for next media data of jumping the medium processing entity correspondence;

Described step B comprises: the Media Stream that the PF entity is jumped the media data processing address information self terminal in future of medium processing entity correspondence according to next that receives directly is sent to this next jumping medium processing entity.

Described next to jump medium processing entity be the CF entity, or PF entity, or other router in the network.

Described next jumping medium processing entity is the PF entity;

The group of described multi-party communication correspondence sets up the group of setting up in the process for the fixedly group of foundation in advance or in session;

In steps A, the CF entity is set up process by session and the media data of a PF entity in the multi-party communication is handled address information is sent to other PF entity.

Described steps A comprises:

The session request of setting up that A1, calling subscriber will carry each called user information is sent to the CF entity by the PF entity;

A2, CF entity are set up the information of each called subscriber in the request and session are set up the PF entity of asking to be sent to each called subscriber place according to session;

The PF entity at A3, each called subscriber place is set up session response message respectively and is sent to the CF entity, the address information that the media data that the CF entity provides each called subscriber place PF entity is handled is carried at session and sets up and be sent to calling subscriber place PF entity in the response message, and the media data of any one PF entity in each called subscriber place PF entity is handled address information is sent to other all called subscriber place PF entity.

In steps A 2, the session that the CF entity is sent is set up and is carried the media data processing address information that calling subscriber place PF entity provides in the request.

Described steps A 3 further comprises: the CF entity receives after session that called subscriber place PF entity sends sets up response message, and the media data that calling subscriber place PF entity is provided is handled address information and is sent to this called subscriber place PF entity.

In steps A 3, described CF entity is handled the step that address information is sent to calling subscriber place PF entity with the media data of each called subscriber place PF entity and comprised: the CF entity is whenever receiving session that a called subscriber place PF entity sends when setting up response message, the current media data of sending the called subscriber place PF entity that session sets up response message handled address information be carried at session and set up and be sent to calling subscriber place PF entity in the response message; Perhaps, the CF entity is whenever receiving session that a called subscriber place PF entity sends when setting up response message, the media data of sending all called subscriber place PF entities that session sets up response message handled address information be carried at session and set up and be sent to calling subscriber place PF entity in the response message.

Further comprised before steps A 1: the CF entity is judged the current medium processing policy downloading process that whether should trigger, if, execution in step A1 then, otherwise the CF entity is carried out the existing process of setting up the multi-party communication session connection, finishes current flow process.

Described CF entity is according to the type of service of this multi-party communication; And/or user property; And/or the service load quantity of CF entity self; And/or the number of users of this multi-party communication; And/or the medium type of transmission; And/or the ability of CF and PF entity, carry out the step of described judgement.

Described multi-party communication is a chat room conversation;

In steps A, when a PF entity adds chat room conversation, this chat room conversation is carried out central controlled CF entity carry out and described the medium processing policy is sent to the step of the PF entity of this adding, and the medium processing policy that upgrades other PF entities of this session.

Described medium processing policy is the buffer memory indication of carrying cache attribute;

Described step B comprises: the PF entity carries out buffer memory to the Media Stream that comes self terminal according to the buffer memory indication of CF entity in the buffer memory duration, and/or the spatial cache that the PF entity is indicated according to the buffer memory of CF entity carries out buffer memory to the Media Stream that comes self terminal.

Described medium processing policy is that the appointment of carrying the media data processing address information of one or more specified PF entities sends request;

Described step B comprises: described PF entity is handled the Media Stream that address information is sent self terminal according to the media data of specifying the PF entity of appointment in the request of transmission.

Described appointment sends in the request and carries specific Media Stream type;

In step B, described Media Stream is this specific Media Stream type.

The CF entity carrying of receiving that the user sends receive user profile order is set the time, perhaps when receiving the routing policy that system side sets, described appointment is sent request is sent to relevant PF entity.

This method further comprises: a PF entity adds this multi-party communication; The PF entity of this adding adds message with the user and is sent to the CF entity;

Described Media Stream processing policy by the media data of adding PF entity correspondence handle address information;

Described step B comprises: a PF entity in the multi-party communication with Media Stream send to comprise add the PF entity of PF entity.

This method further comprises: whole users that PF entity is had jurisdiction in the multi-party communication withdraw from this multi-party communication; The PF entity that this withdraws from withdraws from the user from message and is sent to the CF entity;

Described Media Stream processing policy is handled address information for the media data of the PF entity correspondence that withdraws from;

Described step B comprises: a PF entity in the multi-party communication sends to other PF entity except that withdrawing from PF entity with Media Stream.

The CF entity receive withdraw from the PF entity withdraw from message the time, perhaps when having Media Stream to handle, carry out described steps A follow-up.

A kind of system that realizes multiway telecommunication service, this system comprises: CF entity in the multi-party communication and PF entity, wherein, comprise in the CF entity that media strategy issues the unit, comprise media processing units in the PF entity,

Media strategy issues the unit, is used for the medium processing policy is sent to media processing units in the multi-party communication PF entity;

Media processing units is used for Media Stream and media strategy that receiving terminal sends and issues the medium processing policy of sending the unit, and handles the Media Stream of self terminal according to the medium processing policy that receives.

Described CF entity Shen further comprises trigger element, be used to judge whether to trigger the medium processing policy and issue process, and judge should trigger after, trigger command is sent to media strategy issues the unit;

Described media strategy issues the unit after receiving the trigger command that trigger element sends, and carries out the process that the medium processing policy is sent to media processing units in the PF entity.

Described trigger element is according to the type of service of this multi-party communication; And/or user property; And/or the service load quantity of CF entity self; And/or the number of users of this multi-party communication; And/or the medium type of transmission; And/or the ability of CF and PF entity judges whether to trigger the medium processing policy and issues process.

Described media strategy issues the unit and buffer memory is indicated the media processing units that is sent in the PF entity;

Comprise buffer unit in the described media processing units, the Media Stream that buffer memory indication that is used for sending receiving media policy distribution unit and terminal are sent, and indicate the Media Stream that terminal is sent to carry out buffer memory according to received buffer memory.

This shows that the present invention has the following advantages:

1, in the present invention, the CF entity can by with the PF entity between the Signalling exchange of the relevant medium processing policy that carries out make the PF entity in subsequent process, can handle according to the Media Stream that the indicated medium processing policy of CF entity is sent terminal, therefore, greatly increased the flexibility that multiway telecommunication service is realized.

2, in the present invention, when the CF entity is handled address information with next media data of jumping the medium processing entity correspondence, after handling address information and be sent to a PF entity such as the media data of receiving terminal PF entity correspondence as the medium processing policy, media stream then can need not to pass through the CF entity again, and only need between each PF entity, to transmit to get final product, therefore, reduced the transmission path of Media Stream, greatly reduce the propagation delay time of Media Stream, improved user's business impression, and, owing to the CF entity only needs to need not interactive media stream with PF entity interaction signaling again, therefore, reduce the service load quantity of CF entity, reduced the realization difficulty of CF entity.

Description of drawings

Fig. 1 is the structural representation of system of the present invention.

Fig. 2 is a flow chart of setting up session connection in embodiments of the present invention.

Fig. 3 is the flow chart of media stream in embodiments of the present invention.

Fig. 4 is the flow chart of realizing specifying transmission in embodiments of the present invention.

Fig. 5 is a flow chart of realizing the update content notice in embodiments of the present invention.

Embodiment

The present invention proposes a kind of method that realizes multiway telecommunication service, its core concept is: the CF entity in the multi-party communication is sent to the PF entity with the medium processing policy; The PF entity handles the Media Stream of self terminal according to the medium processing policy that receives.

Multiway telecommunication service of the present invention can be exemplified as press-and-talk (POC) business, Three-Way Calling, Conference Calling, chat room conversation, CALL HOLD or the CALLWAIT etc. based on cellular network.

Fig. 1 is the structural representation of system of the present invention.Referring to Fig. 1, the system of realization multiway telecommunication service proposed by the invention comprises: CF entity in the multi-party communication and PF entity, comprise in the CF entity that media strategy issues the unit, and comprise media processing units in the PF entity, wherein,

Media strategy issues the unit, is used for the medium processing policy is sent to media processing units in the multi-party communication PF entity; Media processing units is used for Media Stream and media strategy that receiving terminal sends and issues the medium processing policy of sending the unit, and handles the Media Stream of self terminal according to the medium processing policy that receives.

Referring to Fig. 1, in system of the present invention, preferably, may further include trigger element in the described CF entity, be used to judge whether to trigger the medium processing policy and issue process, and judge should trigger after, trigger command is sent to media strategy issues the unit; Described media strategy issues the unit after receiving the trigger command that trigger element sends, and carries out the process that the medium processing policy is sent to media processing units in the PF entity.Wherein, described trigger element is according to the type of service of this multi-party communication; And/or user property; And/or the service load quantity of CF entity self; And/or the number of users of this multi-party communication; And/or the medium type of transmission; And/or the ability of CF and PF entity judges whether to trigger the medium processing policy and issues process.

Referring to Fig. 1, in system of the present invention, described media strategy issues the unit can be sent to media processing units in the PF entity as the medium processing policy with buffer memory indication; At this moment, can comprise buffer unit in the described media processing units, the Media Stream that buffer memory indication that is used for sending receiving media policy distribution unit and terminal are sent, and indicate the Media Stream that terminal is sent to carry out buffer memory according to received buffer memory.

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with drawings and the specific embodiments.

In following embodiment, be that example illustrates specific implementation process of the present invention to comprise 3 PF entities in the multiway telecommunication service.

Medium processing policy described in the present invention can carry out the strategy of relevant treatment to Media Stream for any indication, and such as being: next is jumped the media data of medium processing entity correspondence and handles address information; And/or, carry the buffer memory of cache attribute and indicate; And/or the appointment of carrying one or more specified PF tangible media data processing address informations sends request; And/or, user's adding that the PF entity is had jurisdiction over or the notice that withdraws from etc.Wherein, described next jump medium processing entity and can be other router etc. in CF entity or PF entity or the network.

Illustrate at first that below the CF entity jumps medium processing entity with next and handle address information such as the media data of PF entity correspondence and be sent to the PF entity as the medium processing policy, the PF entity according to the media data of received PF entity handle address information in the future the Media Stream of the self terminal PF entity that directly is sent to receiving terminal be that example illustrates specific implementation process of the present invention.

Fig. 2 is a flow chart of setting up session connection in embodiments of the present invention.Referring to Fig. 2, in multiway telecommunication service, in order to guarantee that a PF entity can utilize the media data of the PF entity that receives to handle address information and directly Media Stream is sent to the PF entity of receiving terminal, and need not the forwarding by the CF entity, processing procedure of the present invention specifically may further comprise the steps:

Step 201: the session request of setting up that the calling subscriber will carry called party information is sent to self affiliated PF entity.

Step 202: a PF entity is sent to the CF entity with the received session request of setting up.

Here, a PF entity can carry one and directly send parameter in the session foundation request that is sent, and directly sends the function of parameter notice CF entity the one PF entity support without the direct transmission Media Stream of CF entity by this.And a PF entity is sent in the session request of setting up of CF entity and has comprised called party information.

Whether step 203:CF entity is judged should trigger medium processing policy downloading process in this multi-party communication, if then execution in step 204, otherwise the CF entity is carried out the existing process of setting up the multi-party communication session connection, finishes current flow process.

Here, the foundation of CF entity execution judgement can be: the type of service of this multi-party communication; And/or user property; And/or the service load quantity of CF entity self; And/or the number of users of this multi-party communication; And/or the medium type of transmission; And/or the ability of CF and PF entity etc.

The session request of setting up that step 204:CF entity will carry a PF tangible media data processing address information is sent to the 2nd called in this multi-party communication PF entity and the 3rd PF entity respectively.

Here, the CF entity can be set up in the session that sent and carry one in the request and directly send parameter, thereby notifies the 2nd PF entity and the 3rd PF entity in subsequent process, and Media Stream directly sends and need not the entity by CF.

Step 205: the 2nd PF entity is set up the media data that obtains a PF entity the request from the session that receives and is handled address information, and response message is set up in session is sent to the CF entity.

Here whether can comprise a kind of situation, part PF supports this function, and part PF does not support that you have seen and there is no need to increase

Step 206:CF entity is handled address information with the media data of the 2nd PF entity and is carried at session and sets up and be sent to a PF entity in the response message, and the media data of the 2nd PF entity is handled address information is sent to the 3rd PF entity.

In this step, a PF entity and the 3rd PF entity have then obtained the media data processing address information of the 2nd PF entity.

Step 207: the 3rd PF entity is set up the media data that obtains a PF entity the request from the session that receives and is handled address information, and response message is set up in session is sent to the CF entity.

Step 208:CF entity is handled address information with the media data of the 3rd PF entity and is carried at session and sets up and be sent to a PF entity in the response message, and the media data of the 3rd PF entity is handled address information is sent to the 2nd PF entity.

In this step, a PF entity and the 2nd PF entity have then obtained the media data processing address information of the 3rd PF entity.

In above-mentioned steps 204, the CF entity is sent to the session of the 2nd PF entity and the 3rd PF entity and sets up the media data processing address information of carrying a PF entity in the request, handles address information so that the 2nd PF entity and the 3rd PF entity obtain the media data of a PF entity.In the present invention, in above-mentioned steps 204, the CF entity is sent in the session request of setting up of the 2nd PF entity and the 3rd PF entity also can not carry a PF tangible media data processing address information, and, in subsequent process, receive after session that the 2nd PF entity and the 3rd PF entity send sets up response message at the CF entity, again the media data of a PF entity is handled address information and be sent to the 2nd PF entity and the 3rd PF entity respectively.

Because each the PF entity in the corresponding group of multi-party communication all may send Media Stream as source PF entity, so, in the present invention, should guarantee that each PF entity can know that all the media data of other PF entity in the group handles address information, so in above-mentioned steps 206 and step 208, the CF entity is handled address information with the media data of the 2nd PF entity/the 3rd PF entity and is sent in this multi-party communication other each PF entity.

Need to prove, above-mentioned steps 205 to step 206 and step 207 to step 208 is for convenience of description and the step of dividing, in concrete Business Entity, step 205 to step 206 and step 207 to there is no fixing execution sequencing between the step 208.

In addition, in above-mentioned steps 205 to the process of step 208, the CF entity also can receive after session that the 2nd PF entity and the 3rd PF entity send respectively sets up response message, the media data of the 2nd PF entity and the 3rd PF entity is handled address information be carried at a session and set up and be sent to a PF entity in the response message.

So far, then setting up process by session makes source PF entity obtain the media data processing address information of purpose PF entity.Source PF entity described herein and purpose PF entity all can be any one in a PF entity, the 2nd PF entity and the 3rd PF entity.

The process that the above-mentioned process of passing through session foundation shown in Figure 2 makes source PF entity obtain purpose PF tangible media data processing address information is applicable to the situation of the pairing group of multi-party communication for setting up in advance, is applicable to that also this group sets up interim situation about setting up in the process in session.

If multiway telecommunication service is the POC business, then the request of setting up of the session described in the present invention is INVITE, and it is 200 OK message that response message is set up in described session.

Fig. 3 is the flow chart of media stream in embodiments of the present invention.Referring to Fig. 3, in the present invention, be example as source PF entity with a PF entity, realize that the process of direct media stream specifically may further comprise the steps:

Step 301: the calling subscriber is sent to a PF entity with Media Stream.

Step 302: a PF entity is handled address information according to the media data of the 2nd PF entity that is obtained the Media Stream that receives is sent to the 2nd PF entity.

Step 303: the 2nd PF entity is sent to the Media Stream that receives each user who self has jurisdiction over.

Step 304: a PF entity is handled address information according to the media data of the 3rd PF entity that is obtained the Media Stream that receives is sent to the 3rd PF entity.

Step 305: the 3rd PF entity is sent to the Media Stream that receives each user who self has jurisdiction over.

Need to prove, above-mentioned steps 302 to step 303 and step 304 to the sequencing that there is no between the step 305 in the execution.

When described medium processing policy for carrying cache attribute, such as buffer memory duration and spatial cache etc., buffer memory when indication, specific implementation process of the present invention is: the buffer memory indication that the CF entity will carry cache attribute is sent to any one the PF entity in the multi-party communication; This PF entity carries out buffer memory to the Media Stream that comes self terminal according to the cache attribute in the buffer memory indication of CF entity in the buffer memory duration, and/or the PF entity carries out buffer memory according to the spatial cache of CF entity buffer memory indication to the Media Stream that comes self terminal.

In addition, the multi-party communication described in the present invention can be a chat room conversation.At this moment, when a PF entity adds chat room conversation, this chat room conversation is carried out central controlled CF entity the media data that add the PF entity is before handled the PF entity that address information is sent to this current adding, and media data processing address information of this current adding PF entity is sent to added PF entity before.Like this, each PF entity then can directly be sent to other PF entity in this chat room conversation according to the Media Stream that the media data processing address information of self obtaining is sent the user.

The following describes when the medium processing policy be the appointment of carrying one or more specified PF tangible media data processing address informations when sending request, specific implementation process of the present invention.

Fig. 4 is the flow chart of realizing specifying transmission in embodiments of the present invention.Referring to Fig. 4, in multi-party communication, the CF entity can indicate source PF entity specific Media Stream to be sent to the purpose PF entity of an appointment, and need not to be sent to other all PF entity in the multi-party communication, with a PF entity as source PF entity, the 3rd PF entity is an example as the purpose PF entity of appointment, and the process that this appointment sends specifically may further comprise the steps:

Step 401:CF entity will be specified and be sent message and be sent to a PF entity as source PF entity.

Here, the CF entity can be carrying of receiving that the user sends receive user profile order is set the time carry out the process of this step, also can be when receiving the routing policy that system side sets, carry out the process of this step.And described appointment sends can carry specified purpose PF entity i.e. the media data processing address information of the 3rd PF entity and specified Media Stream type etc. in the message.

Step 402: a PF entity receives the Media Stream that the user sends, judge whether this Media Stream is specified Media Stream type, if, then execution in step 403, otherwise, the one PF entity directly is sent to other all PF entities in this multi-party communication with the Media Stream that receives, and finishes current flow process.

Step 403: a PF entity according to specify to send the purpose PF entity that carries in the message promptly the media data of the 3rd PF entity handle address information, the Media Stream of received specified type directly is sent to the 3rd PF entity.

In the present invention, when a PF entity added multi-party communication, the PF entity of this adding added message with the user and is sent to the CF entity; The media data of the PF entity that this CF entity will add is handled address information and is sent to existing PF entity in the multi-party communication, and the media data of existing PF entity in the multi-party communication handled the PF entity that address information is sent to this adding, like this, existing PF entity all can be carried out the process that need not to transmit by the CF entity direct transmission Media Stream among the present invention in the PF entity of this adding and the multi-party communication in subsequent process.

The following describes when the medium processing policy be update content notice, specific implementation process of the present invention such as the adding of the user the PF entity under or when withdrawing from.

Fig. 5 is a flow chart of realizing the update content notice in embodiments of the present invention.Referring to Fig. 5, in the present invention, when the content of multi-party communication is upgraded, withdraw from this multi-party communication such as all users under the 2nd PF entity, then the process notified of the information that this is withdrawed from specifically may further comprise the steps:

Step 501: the 2nd PF entity withdraws from the user from message and is sent to the CF entity.

Step 502:CF entity withdraws from the 2nd PF entity from message and is sent to other all PF entities in this multi-party communication, i.e. a PF entity and the 3rd PF entity.

Step 503: in the process of transmitting of subsequent media stream, a PF entity directly is sent to the 3rd PF entity in this multi-party communication with self Media Stream.

Here, because the user under the 2nd PF entity has withdrawed from this multi-party communication, so a PF entity no longer is sent to Media Stream the 2nd PF entity.

In addition, if the 3rd PF entity is as source PF entity, then in this step 503, the 3rd PF entity directly is sent to a PF entity with the Media Stream of self.

Need to prove, in the present invention, in the time the media data processing address information of purpose PF entity need being sent to source PF entity, the CF entity can all be handled address information with the media data of all PF entities at every turn and be sent to source PF entity when receiving the response message of a purpose PF entity, the CF entity also can be that the media data processing address information of only this being sent the PF entity of response message when at every turn receiving the response message of a purpose PF entity is sent to source PF entity.Such as, set up in the process in above-mentioned session shown in Figure 2, the CF entity at first receives the session that the 2nd PF entity sends and sets up response message, then the media data of the 2nd PF entity is handled address information and be sent to a PF entity, when in subsequent process, the CF entity receives session that the 3rd PF entity sends when setting up response message, the CF entity can be handled address information with the media data of the 3rd PF entity and the media data of the 2nd PF entity that sent is handled address information and is sent to a PF entity, also can only the media data of the 3rd PF entity be handled an address information and be sent to a PF entity.

In a word, the above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1, a kind of method that realizes multiway telecommunication service is characterized in that, this method comprises:

A, Control Server CF entity are sent to the medium processing policy and participate in server PF entity;

2, method according to claim 1 is characterized in that, described medium processing policy is handled address information for next media data of jumping the medium processing entity correspondence;

3, method according to claim 2 is characterized in that, described next to jump medium processing entity be the CF entity, or PF entity, or other router in the network.

4, method according to claim 3 is characterized in that, described next jumping medium processing entity is the PF entity;

5, method according to claim 4 is characterized in that, described steps A comprises:

6, method according to claim 5 is characterized in that, in steps A 2, the session that the CF entity is sent is set up and carried the media data processing address information that calling subscriber place PF entity provides in the request.

7, method according to claim 5, it is characterized in that, described steps A 3 further comprises: the CF entity receives after session that called subscriber place PF entity sends sets up response message, and the media data that calling subscriber place PF entity is provided is handled address information and is sent to this called subscriber place PF entity.

8, method according to claim 5, it is characterized in that, in steps A 3, described CF entity is handled the step that address information is sent to calling subscriber place PF entity with the media data of each called subscriber place PF entity and comprised: the CF entity is whenever receiving session that a called subscriber place PF entity sends when setting up response message, the current media data of sending the called subscriber place PF entity that session sets up response message handled address information be carried at session and set up and be sent to calling subscriber place PF entity in the response message; Perhaps, the CF entity is whenever receiving session that a called subscriber place PF entity sends when setting up response message, the media data of sending all called subscriber place PF entities that session sets up response message handled address information be carried at session and set up and be sent to calling subscriber place PF entity in the response message.

9, method according to claim 5, it is characterized in that, further comprised before steps A 1: the CF entity judges that the current medium processing policy that whether should trigger issues process, if, execution in step A1 then, otherwise the CF entity is carried out the existing process of setting up the multi-party communication session connection, finishes current flow process.

10, method according to claim 9 is characterized in that, described CF entity is according to the type of service of this multi-party communication; And/or user property; And/or the service load quantity of CF entity self; And/or the number of users of this multi-party communication; And/or the medium type of transmission; And/or the ability of CF and PF entity, carry out the step of described judgement.

11, method according to claim 1 is characterized in that, described multi-party communication is a chat room conversation;

12, method according to claim 1 is characterized in that, described medium processing policy is the buffer memory indication of carrying cache attribute, and wherein, described cache attribute is buffer memory duration and/or spatial cache;

13, method according to claim 1 is characterized in that, described medium processing policy is that the appointment of carrying the media data processing address information of one or more specified PF entities sends request;

14, method according to claim 13 is characterized in that, described appointment sends in the request and carries specific Media Stream type;

In step B, described Media Stream is this specific Media Stream type.

15, method according to claim 13, it is characterized in that, the CF entity carrying of receiving that the user sends receive user profile order is set the time, perhaps when receiving the routing policy that system side sets, described appointment is sent request is sent to relevant PF entity.

16, method according to claim 1 is characterized in that, this method further comprises: a PF entity adds this multi-party communication; The PF entity of this adding adds message with the user and is sent to the CF entity;

17, method according to claim 1 is characterized in that, this method further comprises: whole users that PF entity is had jurisdiction in the multi-party communication withdraw from this multi-party communication; The PF entity that this withdraws from withdraws from the user from message and is sent to the CF entity;

18, method according to claim 17 is characterized in that, the CF entity receive withdraw from the PF entity withdraw from message the time, perhaps when having Media Stream to handle, carry out described steps A follow-up.

19, a kind of system that realizes multiway telecommunication service, this system comprises: CF entity in the multi-party communication and PF entity, it is characterized in that, comprise in the CF entity that media strategy issues the unit, comprise media processing units in the PF entity, wherein,

20, system according to claim 19, it is characterized in that, further comprise trigger element in the described CF entity, be used to judge whether to trigger the medium processing policy and issue process, and judge should trigger after, trigger command is sent to media strategy issues the unit;

21, system according to claim 20 is characterized in that, described trigger element is according to the type of service of this multi-party communication; And/or user property; And/or the service load quantity of CF entity self; And/or the number of users of this multi-party communication; And/or the medium type of transmission; And/or the ability of CF and PF entity judges whether to trigger the medium processing policy and issues process.

According to claim 19,20 or 21 described systems, it is characterized in that 22, described media strategy issues the unit and buffer memory indicated the media processing units that is sent in the PF entity;