CN100407817C

CN100407817C - Method for controlling right to speak in PoC session

Info

Publication number: CN100407817C
Application number: CN2005101257216A
Authority: CN
Inventors: 张生庭; 伍旭刚; 王峥
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2005-12-01
Filing date: 2005-12-01
Publication date: 2008-07-30
Anticipated expiration: 2025-12-01
Also published as: CN1863340A

Abstract

The present invention relates to a method for controlling rights to speak in PoC sessions in the technical field of communication. Firstly, a PoC client end sends a speaking right request which comprises selectable subfields of media types; a server grants the PoC client end with a speaking right according to the speaking right request. The method adds the selectable subfields of media types to TBCP protocols to make a PoC user apply different speaking rights on media of different types or apply media of various types on one speaking right. The time length of applying the speaking right and the magnitude of media flow quantity are used as options, and thus, the PoC user can request the time length of speaking as required.

Description

Floor control method in a kind of PoC session

Technical field

The present invention relates to communication technical field, relate in particular to the floor control method in a kind of PoC session.

Background technology

PoC (Push-to-talk over Cellular) is PTT (PTT) business that realizes on packet network of OMA (Open Mobile Alliance tissue) definition, is called Push to talk over Cellular.It adopts VolP (packet voice) and semiduplex mode low cost, the high efficiency real time communication demand that has satisfied the user.By this business, the user can initiate PoC session to unique user or group, realizes one to one or the conversational mode of one-to-many.

Because PoC service has adopted semiduplex communication pattern, therefore before PoC user's speech, need PoC user can send preceding the holding consultation of Talk Burst (right to speak), determine whether to allow to send.Carrying out the PoC server of PoC controlled function facilitates the Talk Burst between the PoC user to decide.In the PoC session that voice call is only arranged, this control protocol is called TBCP (right to speak control protocol); Multiple medium are being arranged, and in the PoC session as video, audio frequency, picture, file, text etc., this control protocol is called MBCP (medium right to speak control protocol).The TBCP agreement is a kind ofly to use the agreement of bag based on RTCP (RTCP Real-time Transport Control Protocol), but TBCP does not observe the rule of being formulated for compound RTP (RTP) bag or the transmission of RTP bag.For example, in the PoC1 business, the request message format of TBCP is as follows:

TBCP Talk Burst request message

0 1 2 3

0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

|V＝2|P|0?0?0?0?0|?PT＝APP＝204?| length |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

|SSRC?of?PoC?Client?requesting?permission?to?send?a?talk?burst|

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| name＝PoC1 |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

|Option?ID |Option?Length | :

| Option?Value :

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

：：

|Option?ID |?Option?Length?| |

: Option?Value :

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

In TBCP Talk Burst request message, can comprise one or more optional territories, each optional territory of TBCP Talk Burst request message comprises three subdomains:

First subdomain is optional ID subdomain, is used to identify the option of selection as the optional ID of 8-bit;

Second subdomain is the selectable length subdomain, is made up of a byte, and the length in whole optional territory is described, the value of selectable length subdomain should equal the summation of optional ID subdomain, selectable length subdomain and optional value subdomain byte number;

The 3rd subdomain is optional value subdomain, comprises the integer value of a byte number, and the form of this subdomain and value depend on application of option.

In the existing technical scheme, PoC user sends the right to speak application to the PoC server, and the PoC server is carried out right to speak control ruling according to certain strategy, and distributes the right to speak duration of an acquiescence for each right to speak.After PoC user obtained the floor, the time span of server supervision Talk Burst had surmounted in Talk Burst time span under the Talk Burst duration situation of PoC server configuration, cancels the talk of having permitted.

By above-mentioned narration as can be known, the PoC server can't know which kind of medium type is the right to speak of request be among the existing TBCP, and PoC user can't ask the speech duration of oneself as required, and the PoC server can not be distributed different speech durations according to different media contents.As in Multimedia session, suppose that the user is carrying out the transmission of file, picture or video, arrive this moment the right to speak time, and conversation certainly will cause the failure transmitted, needs the request floor weight newly to transmit after the failure again, the waste resource.

Summary of the invention

In view of above-mentioned existing in prior technology problem, the object of the present invention is to provide the floor control method in a kind of PoC session, in TBCP right to speak control protocol, increase a subdomain, PoC user can be weighed according to media content and character request floor.

The objective of the invention is to be achieved through the following technical solutions:

Floor control method in a kind of Push to talk over Cellular PoC session comprises:

A, PoC client are sent the right to speak request that comprises optional medium type subdomain; Carry the routing information that sends the entity of Media Stream in medium right to speak request mark, medium right to speak application duration, medium flow size and/or the PoC session in the described medium type subdomain;

B, server are authorized PoC client right to speak according to described right to speak request.

Also carry medium type length and medium type in the described steps A in the medium type subdomain.

The entity that sends Media Stream in the described steps A in the PoC session of medium type subdomain is the requestor, or other participant.

Described medium flow size is read automatically by the PoC client, and assignment is to medium flow field.

Described steps A further comprises:

Medium right to speak application duration field is set to 0, and expression does not have the request floor duration, utilizes the setup time of server acquiescence; Otherwise, the speech duration of expression PoC client actual request.

When the value of medium right to speak application duration surpassed the maximum duration of session, described steps A further comprised:

Server sends the PoC client that a prompting is reported or error reporting is weighed to request floor.

When PoC client request floor duration, described step B further comprises:

Server is authorized the corresponding medium speech of PoC client duration according to the speech duration in the described right to speak request; And/or,

Server is authorized PoC client medium speech duration according to the medium type in the described right to speak request; And/or,

Server distributes certain speech duration according to the medium flow size of right to speak application.

The scheme of authorizing PoC client right to speak among the described step B comprises:

The queuing policy that server obtains the floor earlier according to first to file is authorized PoC client right to speak; And/or,

Authorize PoC client right to speak according to the strategy of distributing according to the length of right to speak application time; And/or,

Authorize PoC client right to speak according to the strategy of just dispatching according to priority; And/or,

Authorize PoC client right to speak according to the strategy of dispatching according to the size of medium flow; And/or,

Stand-by period according to the user is adjusted priority.

Described method also comprises:

C, the PoC client that is awarded the right to speak send Media Stream, finish the back and discharge right to speak.

The scheme of described release right to speak specifically comprises:

If right to speak application duration is the setup time of server acquiescence, when then time limit of speech surpassed this setup time, server was recalled the right to speak of client; Perhaps, if right to speak application duration is a PoC client application duration, when then time limit of speech surpassed the application duration, server was recalled the right to speak of client; Perhaps,

Speech finishes the back user and initiatively discharges right to speak; Or,

In the certain hour that right to speak takies, without any media content when sending, discharge the right to speak of this client.

As seen from the above technical solution provided by the invention, the present invention is by increasing optional medium type subdomain in the TBCP agreement, make PoC user apply for different rights to speak on the different medium types or the multiple medium type of application on a right to speak, and with the request floor duration as option, make PoC user can ask the duration of making a speech as required.

Description of drawings

Fig. 1 is a kind of embodiment operational flowchart of the method for the invention;

Fig. 2 is the another kind of embodiment operational flowchart of the method for the invention.

Embodiment

Core concept of the present invention provides the floor control method in a kind of PoC session, in TBCP right to speak control protocol, increase a subdomain, make PoC user apply for different rights to speak on the different medium types or the multiple medium type of application on a right to speak, and with the request floor duration as option, make PoC user can ask the duration of making a speech as required.

The invention provides the floor control method in a kind of PoC session, a kind of embodiment operating process specifically comprises the steps: as shown in Figure 1

Step 1:PoC client is sent the MBCP right to speak request that carries optional medium type subdomain;

In the APP of TBCP agreement (application data bag) field, increase an optional medium type subdomain, have in comprising in the described subdomain: medium right to speak request mark (Media Burst ID), medium type length (Media Type Length), medium type (Media Type), medium right to speak application duration (Media Duration Time), medium flow size (Medai TraffiC), send the physical path information (Media SourCe) of Media Stream in the PoC session, these fields are optional, in a right to speak application, can occur simultaneously, also can select wherein some field on demand; The entity that sends Media Stream in the described PoC session comprises requestor or other participant, as PoC Box (PoC voice mail) etc.; TBCP after the expansion is MBCP, and the media formats after this expansion is:

0 1 2 3

0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

|?SSRC?of?PoC?Client?requesting?permission?to?send?a?talk?burst?|

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| name＝PoC2 |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

|?Option?ID |?Option?Length?| :

| Option?Value :

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

: :

|Option?ID |?Option?Length?| |

: Option?Value :

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

: :

Length Time

: :

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

|Media Traffic?|Media?Source | |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

When the PoC client need be every kind of medium request floor power, it is a kind of temporary selecting the medium type field at request floor; In the time need applying for the right to speak of multiple medium on a right to speak, selecting corresponding medium type field is multiple medium type combination; Described medium type comprises video, audio frequency, picture, file or text, and the combination in any of this several types.

For the selection of right to speak duration, can be according to following agreement:

A) when medium right to speak application duration field is 0, expression does not have the request floor duration, utilizes the setup time of server acquiescence;

B) when medium right to speak application duration is not 0, be the speech duration that reality is provided with, the user can be provided with the duration suitable with session persistence, but can not surpass the time of session persistence, at this moment, server can be done a restriction to the maximum duration of user applies as required;

C) if the value of medium right to speak application duration surpasses the maximum duration of session, server should send a prompting report or error reporting to the PoC client of request floor power;

Described medium flow size can be read automatically by terminal, is filled into medium flow field.

Step 2: server is carried out right to speak and is distributed strategy;

Described right to speak is distributed strategy and is comprised: the queuing policy that first to file obtains the floor earlier; The strategy of distributing according to the length of right to speak application time, as, the short time preferentially obtains the floor; The strategy of just dispatching according to priority; Carry out scheduling strategy according to medium application flow size, the priority of task little as the medium flow; Adjust priority policy according to period of reservation of number length, long more as period of reservation of number, priority is high more; Or the combined schedule of above these several modes.

Described right to speak speech duration is distributed strategy and is comprised:

One) server is distributed according to the actual duration of client application;

Two) server can be distributed different durations according to medium type, as: the medium type of application is non real-time video, picture or file, then distributes long duration or takes mode in unlimited time; When the medium type of application is voice or real-time video, then distribute the short relatively time;

Three) server distributes certain speech duration according to the medium flow size of right to speak application;

Or the combination of this several method;

Step 3: server is authorized corresponding PoC client MBCP right to speak;

Server is authorized corresponding PoC client MBCP right to speak, notifies other PoC client rights to speak occupied message simultaneously;

Step 4: the PoC client that is awarded the right to speak sends Media Stream;

Step 5: discharge right to speak;

Release for right to speak can be adopted following strategy:

If right to speak application duration is the setup time of server acquiescence, when then time limit of speech surpassed this setup time, server was recalled the right to speak of client; Perhaps,

If right to speak application duration is a PoC client application duration, when then time limit of speech surpassed this duration, server was recalled right to speak; Perhaps,

Take duration and above-mentioned two kinds of situation following times at time limit of speech less than right to speak, all can adopt following strategy:

Speech finishes back user oneself and initiatively discharges; Or,

In the certain hour that right to speak takies, without any media content when sending, discharge the right to speak of this client;

Operating process when described right to speak is initiatively discharged by client as shown in Figure 1; The operating process that the serviced device of described right to speak is recalled as shown in Figure 2.

In sum, the present invention is by increasing optional medium type subdomain in the TBCP agreement, make PoC user apply for different rights to speak on the different medium types or the multiple medium type of application on a right to speak, and with request floor duration and right to speak flow size as option, make PoC user can ask the duration of making a speech as required.

The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.

Claims

1. the floor control method in the Push to talk over Cellular PoC session is characterized in that, comprising:

A, PoC client are sent the right to speak request that comprises optional medium type subdomain; Carry in the described medium type subdomain in medium right to speak request mark, medium right to speak application duration, medium flow size and the PoC session in the routing information of the entity that sends Media Stream any one or multiple;

2. the floor control method in a kind of Push to talk over Cellular PoC session as claimed in claim 1 is characterized in that, also carries medium type length and medium type in the described steps A in the medium type subdomain.

3. the floor control method in a kind of Push to talk over Cellular PoC session as claimed in claim 1 is characterized in that, the entity that sends Media Stream in the described steps A in the PoC session of medium type subdomain is requestor, PoC voice mail or other participant.

4. the floor control method in a kind of Push to talk over Cellular PoC session as claimed in claim 1 is characterized in that, described medium flow size is read automatically by the PoC client, and assignment is to medium flow field.

5. the floor control method in a kind of Push to talk over Cellular PoC session as claimed in claim 1 is characterized in that described steps A further comprises:

6. the floor control method in a kind of Push to talk over Cellular PoC session as claimed in claim 5 is characterized in that, when the value of medium right to speak application duration surpassed the maximum duration of session, described steps A further comprised:

7. the floor control method in a kind of Push to talk over Cellular PoC session as claimed in claim 5 is characterized in that, when PoC client request floor duration, described step B further comprises:

8. the floor control method in a kind of Push to talk over Cellular PoC session as claimed in claim 1 is characterized in that, the scheme of authorizing PoC client right to speak among the described step B comprises:

Stand-by period according to the user is adjusted priority.

9. the floor control method in a kind of Push to talk over Cellular PoC session as claimed in claim 1 is characterized in that described method also comprises:

C, the PoC client that is awarded the right to speak send Media Stream and finish back release right to speak.

10. the floor control method in a kind of Push to talk over Cellular PoC session as claimed in claim 9 is characterized in that the scheme of described release right to speak specifically comprises:

Speech finishes the back user and initiatively discharges right to speak; Or,