CN1794833A - Method and device of processing PoC speak request - Google Patents
Method and device of processing PoC speak request Download PDFInfo
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- CN1794833A CN1794833A CN 200510098756 CN200510098756A CN1794833A CN 1794833 A CN1794833 A CN 1794833A CN 200510098756 CN200510098756 CN 200510098756 CN 200510098756 A CN200510098756 A CN 200510098756A CN 1794833 A CN1794833 A CN 1794833A
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Abstract
This invention relates to a method for applying for speaking in the period of PoC group session and a device including: a user applies for speak to the PoC server during the press and talk PoC group session based on the cell system, the PoC server informs the information of the application to a pre-designed user, which processes the speaking of the required user based on the inform received, thus, the current and other members of the group can get the situation of speaking of the session in their group timely and efficiently so as to respond it timely.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of method and device that the PoC speaking request is handled.
Background technology
The professional notion of PoC (based on the putting call through immediately after connection of cellular system) comes from intercom.The user need not dialing by preestablishing talk group during conversation, pin specific button, just can simultaneously speech be sent to other all members in the group, and the realization button says that promptly calling and conversation connection procedure were finished in moment.The recipient need not any response and just can answer, and communication process adopts semiduplex mode, and a side is when speaking, and other members can only answer mute.
The tissue of formulating the PoC standard criterion is OMA (Open Mobile Alliance, an Open Mobile Alliance), the PoC network that defines in this standard as shown in Figure 1, wherein:
The PoC network is realized based on IMS (IP Multimedia System), promptly realizes based on " SIP (session initiation protocol)/IP core (core) " among the figure, mainly comprises following entity:
PoC Server: being professional main call control device, is a kind of Application Server (application server) of IMS network;
PoC XDMS: the server of the data such as group information that the storage PoC service needs;
PoC Client:PoC client, the user uses this client and PoC Server to initiate, accept PoC calling, request floor power, speech etc.
After setting up PoC group call (Group Talk), the user can pass through TBCP (right to speak control protocol) to PoC Server request floor power (Floor).Only obtain the floor, the user just is allowed to speak, and its Media Stream (Talk Burst) that produces of speaking will be forwarded to other members of group by PoC Server, thereby make other members can hear its speech.
Below a right to speak application process is described, as shown in Figure 2, specifically comprises:
Step 21 is to step 22: the user can pass through TBCP agreement " Talk Burst Request " message to PoC Server request floor power (Floor);
Step 23 is returned TBCP " Talk Burst Granted " message to step 24:PoC Server and has been allowed speech to inform him for the applicant;
Step 25 is also sent TBCP " Talk BurstTaken " message to other users to step 26:PoC Server, gives other members that participate in cluster conversation with notice current speaking person information.
Step 27 is to step 210: the user who obtains speech speaks, and its Media Stream (Talk Burst) is transmitted to other members in the group by PoC Server;
Step 211 is to step 212: user's speech finishes, and discharges right to speak;
Step 213 is to step 216: group's right to speak free time, PoC Server broadcasts TBCP " Talk Burst Idle " message to group member;
When a plurality of users initiate the right to speak application simultaneously, be responsible for arbitration by PoC Server, only ratify wherein right to speak; Other members' right to speak application or be rejected, or be inserted into a right to speak request queue (TBCP Talk Burst Request Queue), discharge right to speak etc. current speaking person after, PoC Server carries out arbitration process." right to speak request queue " is the optional ability of PoC Server.
The concise and to the point processing logic that described PoC Server receives TBCP " Talk Burst Request " message is as shown in Figure 3: in group call, when making a speech if any the member, other members also can send " Talk Burst Request " to obtain right to speak, speech priority as the applicant is higher than current speaking person, then current speaking then right to speak will be cancelled, applicant's right to speak will go through; When not being higher than the spokesman as applicant's right to speak priority, its right to speak application or refused immediately, or be inserted into " right to speak request queue " (TBCP Talk Burst Request Queue), discharge right to speak etc. current speaking person after, PoC Server carries out arbitration process.
In the group call process, also comprise: all support " right to speak request queue " as PoC Client/PoC Server, PoC Client can ask the situation of current speaking power formation to " the Talk BurstRequest Queue Status Request " that PoC Server sends the TBCP agreement.PoCServer will be with TBCP " Talk Burst Request Queue Status Response " message response.
In the group call process, have a kind of like this application scenarios: a guide is explaining problem, and its priority is not less than the audience, when the audience wishes to put question to, can't interrupt the guide; When the guide wished that the someone puts question to, him can point out in system, and he can discharge right to speak like this, stopped explanation temporarily, answered audience's doubt.In such application scenarios, in a single day current speaking person requires have the people to ask right to speak, and network can in time be notified him.
In the present OMA PoC standard, do not support " right to speak request queue " function as PoC Server, when the people wishes to make a speech, current speaking person can't know the inside story.Support " right to speak request queue " function as PoC Server, then can allow its terminal constantly send TBCP " Talk BurstRequest Queue Status Request " message to PoC Server, inquiry " right to speak request queue " the present situation looks at whether the someone asks right to speak.In case there is the people to rob power, " right to speak request queue " will can not be sky, so terminal can judge that the someone robs power, and current speaking person's terminal will be made prompting, and current speaking person can make a response according to prompting.
As can be seen, in current standard, support " right to speak request queue " function as PoC Server, then can only take the method for constantly inquiry to know whether the someone wishes speech, in order to guarantee in time to obtain queue condition, the frequency of inquiry must be than higher, and frequent message will cause signaling traffic to increase, and this will increase the processing load of PoC Server; And, when enquiry frequency is too high, also may be congested with what cause eating dishes without rice or wine.In addition, no matter the enquiry frequency size all need could obtain queue condition after 1 polling cycle, can't know in time promptly whether the someone asks right to speak.Do not support " right to speak request queue " function as PoC Server, whether members such as current speaking person will not have means to know currently has other members of equal or low priority applying for right of speech.
Summary of the invention
In view of above-mentioned existing in prior technology problem, the purpose of this invention is to provide a kind of method and device that the PoC speaking request is handled, thereby can be in the group call process, the user that can in time the information notice of user applies right to speak made a speech is to satisfy communication requirement neatly.
The objective of the invention is to be achieved through the following technical solutions:
The invention provides the method for request floor power in a kind of PoC cluster conversation process, comprising:
In A, the press-and-talk PoC cluster conversation process based on cellular system, the user sends speaking request to the PoC server;
The described speaking request information notice of B, PoC server predetermined user, and the user's that sends speaking request right to speak is handled according to the notice that receives by corresponding predesignated subscriber.
Described method also comprises:
Configuration right to speak competitor notification strategy on the PoC server, described strategy comprises: when competing speech, the user whether notifies the predesignated subscriber, and predesignated subscriber's information.
Described predesignated subscriber's information comprises:
Special member user in the group and/or the specific user outside the group.
Also comprise before carrying out described step B:
The PoC server receives speaking request message, judges whether the priority of sending the message user is higher than current speaking person's priority, if, then recall current speaking person's right to speak, and be this user's floor grant, otherwise, execution in step B.
Also comprise before carrying out described step B:
When the user's who sends speaking request message priority is lower than current speaking person's priority, judge then whether the PoC server supports right to speak request queue function, if, then described speaking request person is added in the speaking request formation, execution in step B, otherwise, direct execution in step B.
Described step B comprises:
B1, PoC server are determined to need to notify the predesignated subscriber with this speaking request information, and notify corresponding predetermined user;
B2, according to the notice that receives the user's that sends speaking request right to speak is handled by described predesignated subscriber.
Described step B1 comprises:
When the PoC server determined that according to right to speak competitor's notification strategy of configuration needs are notified the predesignated subscriber with this speaking request, the user profile that then writes down in described right to speak competitor's notification strategy sent right to speak competitor notification message.
Described step B1 also comprises:
When the PoC server determines that according to right to speak competitor's notification strategy of configuration needs are not notified the predesignated subscriber with this speaking request, then speaking request person is added in the speaking request formation or and return refusal right to speak request message to this user.
Described step B2 comprises:
B21, the user who receives described right to speak competitor's notification message discharge right to speak;
B22, described speaking request person send the right to speak request to the PoC server once more, and PoC server floor grant, and this speaking request person makes a speech.
Among the present invention, carry out described step B21 and also comprise before:
When the user who receives described right to speak competitor's notification message determines that according to the operation of configured strategy or artificial input needs discharge right to speak, execution in step B21.
The present invention also provides the device of request floor power in a kind of PoC cluster conversation process, comprising:
Strategy is preserved module: be used to preserve right to speak competitor notification strategy, and offer right to speak competitor notification module;
Right to speak competitor's notification module: be used for determining whether that according to described right to speak competitor's notification strategy needs send right to speak competitor notification message, and when determining to need to send, carry out the transmission of right to speak competitor notification message.
Described device can be arranged in the PoC server.
As seen from the above technical solution provided by the invention, realization of the present invention makes that current speaking person in the cluster conversation or other group members can be in time and know the situation of the right to speak request in this cluster conversation efficiently, thereby makes appropriate reaction in time.And realization of the present invention also makes PoC service can better adapt to the application of the business scenario of various interactions such as discussion, explanation.
Description of drawings
Fig. 1 is the schematic network structure of OMA PoC standard;
Fig. 2 is the right to speak application process schematic diagram in the OMA PoC standard;
Fig. 3 is the right to speak request processing procedure schematic diagram in the OMA PoC standard;
Fig. 4 is the right to speak application process schematic diagram among the present invention;
Fig. 5 is the right to speak request processing procedure schematic diagram among the present invention;
Fig. 6 is the structural representation of device of the present invention.
Embodiment
Core of the present invention is on the basis of existing OMA PoC standard, a kind of PoC right to speak processing of request method is provided, so that the current speaking person in the cluster conversation or other group members, in time and efficiently know the situation of the right to speak request in this cluster conversation.
Method of the present invention mainly comprises: when PoC Server receives right to speak request " TalkBurst Request ", be not higher than current speaking person as requestor's priority, by right to speak processed flow process, the requestor can not seize current speaking person's right to speak, but PoC Server will be according to certain strategy, other users to current speaking person and group's strategy permission send a notification message, and have the user to propose the speech application now with notice current speaking person, and promptly the someone wishes speech.
This message that PoC Server sends is TBCP (right to speak control protocol) message of speech competitor's notice " Talk Burst CompetitorsNotify ", do not define this message in the current OMA standard, therefore, need this message of expansion and processing procedure thereof.
Method of the present invention and prior art compatibility, therefore also comprise: when PoC Server receives right to speak request " Talk Burst Request ", there is not a spokesman as current, or requestor's priority is higher than current speaking person, then still handle accordingly according to present OMA standard flow process, be specially: the applicant obtains the floor, or current speaking person is cancelled right to speak.
Be described in detail below in conjunction with the specific implementation of accompanying drawing method of the present invention.
For realizing the present invention, at first need on PoC Server, dispose corresponding policy information, described strategy is called " right to speak competitor's notification strategy ", specifically can be:
One of local policy of PoC Server: the call handling process that influences all groups;
One of group's strategy: one of group attribute, this strategy only influences the call treatment of this group of definition strategy.
The main information content of described strategy comprises:
(1) tactful Enable (enabling) sign: when the someone competes right to speak, promptly when the user competes speech, whether notify the predesignated subscriber, whether send TBCP message " Talk BurstCompetitors Notify " to the predesignated subscriber;
(2) user list of reception " Talk Burst Competitors Notify " TBCP message: the information that is writing down the predesignated subscriber in the tabulation, described user can be the special member of group, also can be the user of group outside, can also be certain class role's group member, as current speaking person, the Owner of group, management and group person etc.; This user list also can comprise other dynamic subscribers, as some users who initiatively receives " the Talk Burst Competitors Notify " message of group and obtain the PoC server authorizes to the application of PoC server.This user list is only just meaningful when being " enable (enabling) " at " tactful Enable sign ".
After having disposed corresponding strategy on the PoC Server, at PoC right to speak processing of request process as shown in Figure 4, specifically comprise:
Step 401 is to step 410: a member of cluster conversation successfully applies for right to speak, becomes " the current speaking person " of group, and just during the speech, its Media Stream (Talk Burst) is transmitted to other members of group by PoC Server;
With reference to shown in Figure 5, when user's speaking request message is received in the PoC service, if current speaking power for empty, i.e. during no user speech, then execution in step 55, direct floor grant, and finish at the processing of this speaking request is referring to step 513; For current speaking power is not empty, and when promptly having the current speaking user, corresponding processing procedure back will be described in detail.
Step 411 is to step 412: in the cluster conversation process, the group member of non-" current speaking person " is wished speech, press its terminal PoC key, this terminal is sent " Talk BurstRequest " TBCP message with the request right to speak to PoC Server, and this user becomes " speaking request person " in the cluster conversation;
Step 413 is to step 416:PoC Server speaking request person and current speaking person's speech priority relatively, and according to comparative result, the concrete processing procedure of PoC Server comprises as shown in Figure 5:
Step 53: whether the priority of judging speaking request person is higher than current speaking person, if, execution in step 54, otherwise, execution in step 56;
Step 54: the speech priority as speaking request person is higher than current speaking person, and then PoC Server cancels current speaking person's right to speak immediately, sends TBCP message " Talk BurstRevoked (right to speak is recalled) " to current speaking person, and execution in step 55;
Step 55: approval speaking request person's speech, send TBCP message " TalkBurst Granted (floor grant) " to speaking request person, and execution in step 513;
Step 56: " the Talk Burst Request Queue " function of judging whether PoC Server supports, if support, execution in step 57, otherwise, execution in step 58;
That is: the speech priority as speaking request person is not higher than current speaking person, and PoC Server does not cancel current speaking person's right to speak, but handles accordingly according to the ability of PoC Server.
Step 57: support " Talk Burst Request Queue " function as PoC Server, then speaking request person is inserted among the Talk Burst Request Queue execution in step 58;
Step 58:PoC Server checks " right to speak competitor's notification strategy " of configuration, comprises group or local policy, allows as strategy, and promptly strategy requires to notify corresponding user when speaking request, execution in step 59, otherwise, execution in step 511;
Step 59:PoC Server sends TBCP message " Talk BurstCompetitors Notify " to the user list of strategy indication, can comprise current speaking person in the user list, with inform corresponding user now the someone wish speech and execution in step 510;
Described " Talk Burst Competitors Notify " message has been indicated current request person ID and right to speak priority, the content information (supporting this function) that also may comprise current " Talk Burst Request Queue " formation as PoC, sign, position, each user in each comfortable formation who comprises each requestor in queue length, the formation makes a speech maximum estimated time that needs wait for etc.;
Simultaneously, lose the possibility of " Talk Burst Competitors Notify " in order to reduce in the transmission course, PoC Server can retransmit this message within a certain period of time.
Step 510:PoC Server returns TBCP message " Talk Burst Deny (speech refusal) " to the user, and execution in step 513." Reason Phrase (cause field) " cell of this message has been indicated Reason For Denial.In this processing procedure, need increase a cause value for " Reason Phrase " cell: " Talker Notifying (spokesman's notice) ", speaking request person's terminal is pointed out according to this cause value.
Step 511: if " right to speak competitor's notification strategy " do not allow, then need to judge whether to support " Talk Burst Request Queue " function, if support that then execution in step 513, otherwise, execution in step 512;
Step 512: do not allow as " right to speak competitor's notification strategy ", and PoC Server does not support " Talk Burst Request Queue " function, then PoC Server sends TBCP message " Talk Burst Deny (speech refusal) " to speaking request person, be rejected with notice request person's speaking request, and execution in step 513.
Step 513: this speaking request processing procedure finishes.
Step 417 is to step 418: after other group members (can comprise current speaking person) of " right to speak competitor's notification strategy " indication are received TBCP message " Talk Burst Competitors Notify " message, there is the people to wish speech to user's indication, the user takes the action that responds according to prompting, for example, current speaking person discharges right to speak;
When current speaking person determines to allow speaking request person to make a speech according to the operation of configured strategy or artificial input, then discharge the right to speak of oneself, otherwise this user continues speech, this speaking request person continues to wait for;
Step 419 is to step 424: speaking request person presses the PoC key once more, and PoC Server ratifies its right to speak, and this user's speech is carried out with group member alternately.
The present invention also provides the device of request floor power in a kind of PoC cluster conversation process, and described device can be arranged in the PoC server, as shown in Figure 6, specifically comprises:
Strategy is preserved module: be used to preserve right to speak competitor notification strategy, and offer right to speak competitor notification module, can determine whether that according to this strategy PoC server needs send right to speak competitor notification message to specific user;
Right to speak competitor's notification module: be used for determining whether that according to described right to speak competitor's notification strategy needs send right to speak competitor notification message, and when determining that according to strategy needs send described message, carry out the transmission of right to speak competitor notification message.
In sum, the current speaking person in the cluster conversation or other group members can be in time and are known the situation of the right to speak request in this cluster conversation efficiently, thereby make appropriate reaction.And realization of the present invention makes PoC service can better adapt to the business scenario of interactions such as discussion, explanation.
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 (12)
1, the method for request floor power in a kind of PoC cluster conversation process is characterized in that, comprising:
In A, the press-and-talk PoC cluster conversation process based on cellular system, the user sends speaking request to the PoC server;
The described speaking request information notice of B, PoC server predetermined user, and the user's that sends speaking request right to speak is handled according to the notice that receives by corresponding predesignated subscriber.
2, the method for request floor power in the PoC cluster conversation process according to claim 1 is characterized in that described method also comprises:
Configuration right to speak competitor notification strategy on the PoC server, described strategy comprises: when competing speech, the user whether notifies the predesignated subscriber, and predesignated subscriber's information.
3, the method for request floor power in the PoC cluster conversation process according to claim 2 is characterized in that described predesignated subscriber's information comprises:
Special member user in the group and/or the specific user outside the group.
4, the method for request floor power in the PoC cluster conversation process according to claim 1 is characterized in that, carries out described step B and also comprises before:
The PoC server receives speaking request message, judges whether the priority of sending the message user is higher than current speaking person's priority, if, then recall current speaking person's right to speak, and be this user's floor grant, otherwise, execution in step B.
5, the method for request floor power in the PoC cluster conversation process according to claim 4 is characterized in that, carries out described step B and also comprises before:
When the user's who sends speaking request message priority is lower than current speaking person's priority, judge then whether the PoC server supports right to speak request queue function, if, then described speaking request person is added in the speaking request formation, execution in step B, otherwise, direct execution in step B.
6, the method for request floor power in the PoC cluster conversation process that each is stated according to claim 1 to 5 is characterized in that described step B comprises:
B1, PoC server are determined to need to notify the predesignated subscriber with this speaking request information, and notify corresponding predetermined user;
B2, according to the notice that receives the user's that sends speaking request right to speak is handled by described predesignated subscriber.
7, the method for request floor power in the PoC cluster conversation process according to claim 6 is characterized in that described step B1 comprises:
When the PoC server determined that according to right to speak competitor's notification strategy of configuration needs are notified the predesignated subscriber with this speaking request, the user profile that then writes down in described right to speak competitor's notification strategy sent right to speak competitor notification message.
8, the method for request floor power in the PoC cluster conversation process according to claim 7 is characterized in that described step B1 also comprises:
When the PoC server determines that according to right to speak competitor's notification strategy of configuration needs are not notified the predesignated subscriber with this speaking request, then speaking request person is added in the speaking request formation or and return refusal right to speak request message to this user.
9, the method for request floor power in the PoC cluster conversation process according to claim 6 is characterized in that described step B2 comprises:
B21, the user who receives described right to speak competitor's notification message discharge right to speak;
B22, described speaking request person send the right to speak request to the PoC server once more, and PoC server floor grant, and this speaking request person makes a speech.
10, the method for request floor power in the PoC cluster conversation process according to claim 9 is characterized in that, carries out described step B21 and also comprises before:
When the user who receives described right to speak competitor's notification message determines that according to the operation of configured strategy or artificial input needs discharge right to speak, execution in step B21.
11, the device of request floor power in a kind of PoC cluster conversation process is characterized in that, comprising:
Strategy is preserved module: be used to preserve right to speak competitor notification strategy, and offer right to speak competitor notification module;
Right to speak competitor's notification module: be used for determining whether that according to described right to speak competitor's notification strategy needs send right to speak competitor notification message, and when determining to need to send, carry out the transmission of right to speak competitor notification message.
12, the device of request floor power in the PoC cluster conversation process according to claim 11 is characterized in that described device is arranged in the PoC server.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100987565A CN100370849C (en) | 2005-09-05 | 2005-09-05 | Method and device of processing PoC speak request |
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| CNB2005100987565A CN100370849C (en) | 2005-09-05 | 2005-09-05 | Method and device of processing PoC speak request |
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| CN1794833A true CN1794833A (en) | 2006-06-28 |
| CN100370849C CN100370849C (en) | 2008-02-20 |
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| CNB2005100987565A Expired - Fee Related CN100370849C (en) | 2005-09-05 | 2005-09-05 | Method and device of processing PoC speak request |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008104112A1 (en) * | 2007-02-27 | 2008-09-04 | Huawei Technologies Co., Ltd. | Method and device for releasing speaking right |
| CN101159946B (en) * | 2007-11-16 | 2010-12-29 | 中兴通讯股份有限公司 | Floor control method of honeycomb push-to-talk service and honeycomb push-to-talk server |
| CN102457811A (en) * | 2010-10-18 | 2012-05-16 | 中国移动通信集团北京有限公司 | Method, system and device for PoC (Push-to-talk over Cellular) group communication |
| CN104767625A (en) * | 2015-04-28 | 2015-07-08 | 中国人民解放军重庆通信学院 | Distributed arbitration system and method for rights to speak in group session |
| CN106899944A (en) * | 2009-04-06 | 2017-06-27 | 高通股份有限公司 | High priority communication session in wireless communication system |
| CN113099397A (en) * | 2021-05-08 | 2021-07-09 | 儒安物联科技集团有限公司 | Multi-packet voice transmission method based on PTT control, terminal and storage medium |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6295284B1 (en) * | 1998-12-23 | 2001-09-25 | Qualcomm. Inc. | Method and apparatus for providing fair access in a group communication system |
| CN1235418C (en) * | 2001-10-30 | 2006-01-04 | 中兴通讯股份有限公司 | Modile communicatoin system and its group service realizing method |
| CN1292603C (en) * | 2003-07-07 | 2006-12-27 | 中兴通讯股份有限公司 | Mobile communication system apparatus and method for implementing cluster service |
| CN1310539C (en) * | 2003-09-11 | 2007-04-11 | 华为技术有限公司 | A method for cluster user to occupy reversed service channel |
| US20050124365A1 (en) * | 2003-12-05 | 2005-06-09 | Senaka Balasuriya | Floor control in multimedia push-to-talk |
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2005
- 2005-09-05 CN CNB2005100987565A patent/CN100370849C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008104112A1 (en) * | 2007-02-27 | 2008-09-04 | Huawei Technologies Co., Ltd. | Method and device for releasing speaking right |
| US7995974B2 (en) | 2007-02-27 | 2011-08-09 | Huawei Technologies Co., Ltd. | Method and apparatus for revoking a talk burst |
| CN101159946B (en) * | 2007-11-16 | 2010-12-29 | 中兴通讯股份有限公司 | Floor control method of honeycomb push-to-talk service and honeycomb push-to-talk server |
| CN106899944A (en) * | 2009-04-06 | 2017-06-27 | 高通股份有限公司 | High priority communication session in wireless communication system |
| CN102457811A (en) * | 2010-10-18 | 2012-05-16 | 中国移动通信集团北京有限公司 | Method, system and device for PoC (Push-to-talk over Cellular) group communication |
| CN104767625A (en) * | 2015-04-28 | 2015-07-08 | 中国人民解放军重庆通信学院 | Distributed arbitration system and method for rights to speak in group session |
| CN104767625B (en) * | 2015-04-28 | 2018-04-13 | 中国人民解放军重庆通信学院 | Right to speak distributed arbitration program system and method in one group conversation |
| CN113099397A (en) * | 2021-05-08 | 2021-07-09 | 儒安物联科技集团有限公司 | Multi-packet voice transmission method based on PTT control, terminal and storage medium |
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| Publication number | Publication date |
|---|---|
| CN100370849C (en) | 2008-02-20 |
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