KR101672746B1 - Method of floor control for push to talk in mobile communication network - Google Patents
Method of floor control for push to talk in mobile communication network Download PDFInfo
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- KR101672746B1 KR101672746B1 KR1020150128325A KR20150128325A KR101672746B1 KR 101672746 B1 KR101672746 B1 KR 101672746B1 KR 1020150128325 A KR1020150128325 A KR 1020150128325A KR 20150128325 A KR20150128325 A KR 20150128325A KR 101672746 B1 KR101672746 B1 KR 101672746B1
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- H04W76/005—
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W4/10—Push-to-Talk [PTT] or Push-On-Call services
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- H04W76/043—
Abstract
A floor control method for a push to talk service in a mobile communication environment, the floor control method comprising: a floor right arbitration terminal for giving a floor right; a floor right arbitration terminal for giving a floor right from the floor right arbitration terminal The talk burst control is performed by inter-terminal communication in a group of terminals including a received talk burst granting terminal and a speech receiving terminal that receives media data from the talk burst grant terminal, wherein the talk burst grant arbitration terminal is configured to hold the talk burst grant And when the time elapses, the next floor granting terminal is selected and the floor is granted.
According to the present invention, it is possible to control the talk right by limiting the talk time in the off-network environment in which communication is performed between the terminals without a server. Thus, even in an off-network environment, So that all of the terminals can make a fair comment.
Description
The present invention relates to a voice control method for a push to talk service, and more particularly, to a voice control method for a push to talk service in a mobile communication environment capable of controlling a voice right to limit a voice hold time of a terminal And a control method.
In recent years, there has been an increasing interest in special-purpose mobile communication systems such as disaster safety nets and railway network-specific integrated wireless networks, and most special purpose mobile communication systems are being built on the basis of LTE being used in commercial applications.
In such a special-purpose mobile communication system, it is necessary to provide a group communication service such as a push-to-talk (PTT) service, and this service should be able to be serviced in various environments such as a disaster situation.
In addition, 3GPP has standardized the name of this PTT service as Mission Critical Push-To-Talk (MCPTT), and defines not only coverage within mobile communication system coverage but also services outside coverage using direct communication between terminals , Discussing the technology.
In the PTT-type group call described above, only one person (i.e., one terminal) who has acquired the voice in the group needs to be able to speak at a moment. Therefore, algorithms and techniques for appropriately assigning voice are essential, If it is outside the coverage area, it is usually necessary for the terminal in the group to perform the management of the voice rights, not the server in the network.
Even in such a mobile communication system, a packet loss to be transmitted may sufficiently occur according to a wireless environment, and packet loss may occur more conspicuously in a direct communication environment.
Also, if the packet data related to the voice control is lost in the wireless transmission process, the terminal in the group may not receive the state (e.g., acquisition, retrieval, etc.) of the voice, and the voice control algorithm may not operate normally .
Further, at the time of ending the talk, there is a problem that when the terminals in the group can not receive the state information on the talk, the talk right is maintained and the talk talk is not made.
Referring to FIG. 1, PTT over Cellular system, which is a standard established by the Open Mobile Alliance (OMA) as a push-to-talk system, is most commonly used as a current IP-based PTT system. The voice control is performed basically, and the voice control here is performed based on the Media Burst Control Protocol.
A media burst granted message is sent to the terminal to which the floor is to be granted after the floor request, and the maximum speaking time can additionally be included in the message. At this time, the media burst taken message is sent to the other terminal, .
The terminal that has acquired the voice when the voice is revoked sends a Media Burst Release message to the server, and the server shares the revoked state information with the media burst idle message to the terminals in the group.
Referring to FIG. 2, the MCPTT in 3GPP is establishing the TS 23.179 standard. Here, the floor control is provided under the name of floor control, the floor request is requested through the floor request similar to the OMA PoC, and the floor grant / Announcement of the right to speak through floor release / released / idle.
Meanwhile, a PTT service system and method capable of maintaining synchronization between a PTT server and a PTT terminal in a service shade area is disclosed in Korean Patent Publication No. 2006-10609.
However, in the prior art, when an RTCP (RTP Control Protocol) packet is periodically transmitted while receiving an RTP packet and the RTP packet or RTCP packet is not received for a predetermined time, A PTT terminal; And a PTT server for terminating a session with the corresponding PTT terminal if the RTCP packet periodically transmitted from the PTT terminal is not received for a predetermined time and switching to a talk idle state if the RTP packet is not received for a predetermined time, To provide a PTT service for terminal synchronization in the area.
Therefore, it is possible to prevent the occupation of the terminal from being concentrated in the environment where the terminals communicate with each other, to set the floor holding time of each terminal to be limited in order to reliably operate the floor control, Lt; / RTI >
The present invention conceived in view of the above-described circumstances is characterized in that in the environment where communication is performed between terminals, a floor holding time in which a terminal can speak can be set in advance, and a floor is controlled so that another terminal can be given floor The present invention provides a voice control method for a push to talk service in a mobile communication environment.
The technical objects of the present invention are not limited to the technical matters mentioned above, and other technical subjects not mentioned can be clearly understood by those skilled in the art from the following description.
According to another aspect of the present invention, there is provided a method for controlling a talk-right for a push-to-talk service in a mobile communication environment, the method comprising: The talk right is controlled by inter-terminal communication in a group of terminals including an arbitration terminal, a talk granting terminal given a talk right from a talk right arbitration terminal, and a speech receiving terminal receiving media data from a talk grant grant terminal, The terminal selects the next floor granting terminal and gives the floor when the talk burst grant holding time set in the talk grant grant terminal has elapsed.
In the above embodiment, when the floor grant terminal receives the floor grant from the floor arbitration terminal, the floor grant terminal functions as the next floor grant arbitration terminal capable of selecting the next floor grant terminal.
In the above-described embodiment, when the floor grant terminal receives a floor from the floor arbitration terminal, the floor grant terminal is provided with the floor holding time.
In the above embodiment, when granting a floor right to the floor granting terminal, the floor right arbitration terminal transmits a floor grant message including the floor right holding time to each terminal.
In the above embodiment, when the talk burst granting time elapses after the lapse of the talk burst holding time, if there is no talk burst request queue including the information about the terminals for which talk is being requested, or when the talk burst request queue includes the talk burst request queue When the terminal has a lower priority of giving a talk voice than the talk grant terminal, the talk right of the present voice grant terminal is maintained.
In the above embodiment, the current voice granting terminal extends the talk time implicitly to an initially set voice holding time without any separate message transmission, and maintains the voice right.
In the above embodiment, the current voice granting terminal transmits a floor grant message or a floor taken message to extend the floor holding time to the initial floor holding time and maintain the floor.
In the above embodiment, when the talk burst granting time elapses after the lapse of the talk burst granting time, the talk burst granting terminal has the talk burst request queue including the information about the terminals for which the talk request is requested when the next talk burst grant terminal is selected, Is equal to or higher than that of the current floor granting terminal, the terminal is selected as the next floor grant granting terminal.
In the above embodiment, the talk time holding time is set in advance in consideration of the talk grant priority, the talk session holding time suggested when requesting the talk session of the terminal, or the maximum allowable talk session holding time set in advance.
In the above-described embodiment, the speech receiving terminal stores the talk time holding time after receiving the floor grant message transmitted from the talk channel arbitration terminal, and ends the talk session from the talk granting terminal after the talk time holding time elapses If the announcement does not receive the message, it is determined that the talk right of the current floor granting terminal has ended.
If the floor grant message is not received or the floor taken message or the floor release message is not received after the lapse of the talk time holding time, .
In the above embodiment, the speech receiving terminal does not receive a message informing the end of the voice talk from the voice granting terminal and switches to the silent mode in which there is no voice when there is no voice request queue.
In the above embodiment, if there is a talk burst request queue while receiving a message informing the end of the talk burst from the talk burst granting terminal, the terminal having the highest talk burst grant priority among the terminals included in the queue is given the talk burst, The granting terminal may transmit a floor taken message or the floor grant message to the terminals in the group to inform the user that the flooring grant has been granted.
In the above embodiment, if the talk burst receiving terminal does not receive a talk burst end message indicating that the talk burst has been terminated from the talk burst grant terminal, if the talk burst request queue is present, the terminal having the highest talk burst priority among the terminals included in the queue, .
According to the present invention, it is possible to control the talk right with the talk time restriction in the off-network environment in which communication is performed between the terminals without a server. Thus, in the off-network environment, So that all the terminals can make a fair speech.
In addition, even in various situations where a message related to the voice control of the MCPTT is lost in an off-network environment in which packet loss frequently occurs, the same state information on the voice is maintained in the terminal group, thereby achieving a reliable voice control operation .
BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and, together with the description, And shall not be interpreted.
1 is a data flow chart showing an example of a method of controlling a voice control in a general OMA PoC.
2 is a data flow diagram illustrating an example of a method of controlling a voice control in a general 3GPP MCPTT.
3 is a diagram illustrating an overall configuration example of a voice control method for a push-to-talk service in a mobile communication environment according to the present invention.
FIG. 4 is a diagram illustrating a process of granting a voice right after a lapse of a talk time holding time in a talk right control method for a push to talk service in a mobile communication environment of the present invention.
5 is a diagram illustrating a process of maintaining a voice right after a lapse of a talk time holding time in a talk right control method for a push to talk service in a mobile communication environment of the present invention.
6 is a diagram illustrating an operation of a speech receiving terminal after a talk burst holding time according to an embodiment of the present invention in a voice control method for a push to talk service in a mobile communication environment.
7 is a diagram illustrating an operation of a speech receiving terminal after a lapse of a talk burst holding time according to another embodiment in a talk burst control method for a push to talk service in a mobile communication environment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following detailed description of the operation principle of the preferred embodiment of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may unnecessarily obscure the subject matter of the present invention.
The same reference numerals are used for portions having similar functions and functions throughout the drawings. Throughout the specification, when a part is connected to another part, it includes not only a case where it is directly connected but also a case where the other part is indirectly connected with another part in between. In addition, the inclusion of an element does not exclude other elements, but may include other elements, unless specifically stated otherwise.
3 is a diagram illustrating an overall configuration example of a voice control method for a push-to-talk service in a mobile communication environment according to the present invention.
Off-network used in the present invention means a communication environment in which direct communication is performed between
That is, in the off-network,
The mobile communication network may be, for example, an LTE (Long Term Evolution) network.
In the off-network communication environment, the
In addition, the floor granting terminal can perform a speech by arbitrarily giving a floor, while also acting as a floor arbitration. For example, the current talk grant arbitration terminal may select a specific terminal to which a talk burst is to be given by a floor request and send a floor grant message to the selected terminal to grant a floor and a floor arbitration right. Further, it may include itself when selecting a terminal to be given a floor.
At this time, it is preferable that the floor grant message includes the floor holding time so that the floor granting terminal can perform speaking only during the set floor holding time when the floor is granted. The terminal can be smoothly circulated without having the terminal constantly occupying the floor through the floor holding time so that all the
The floor arbitration terminal can set the floor holding time in consideration of the floor giving priority when the floorRequestStatus (status: granted / revoked) message is generated, for example.
In particular, the talk time holding time may be set as the talk time holding time proposed when the talk request is requested from the speaking terminals, or may be set as the maximum allowable talk time holding time set in advance.
The current floor granting terminal may store the floor holding time included in the message after receiving the floor grant message and check whether the floor holding time has elapsed based on the stored time.
When a floor holding time of a floor granting terminal passes, a floor grant message is transmitted to the floor granting terminal after selecting a next floor granting terminal with its own floor arbitration authority .
At this time, if there is a floor request queue, if there is a corresponding
Also, even if there is a floor request queue, if the floor granting priority of the terminal 10 included in the queue is low, or if there is no floor request, the floor is now granted by the floor granting terminal itself and extends the floor holding time implicitly, . At this time, a floor grant message may be transmitted to each of the
To this end, a floor grant message is transmitted from the floor arbitration terminal to the floor granting terminal and a floor grant message is also received to the speech receiving terminal so that the floor holding time can be confirmed. Through the received floor grant message, the speech receiving terminals can store the talk time holding time included in the message, check whether the talk time holding time has elapsed, and perform the action such as requesting the talk right.
Further, if the speech receiving terminal does not receive a notice that the voice is terminated or the voice is given to the
When the speech receiving terminal deemed to have the voice has been withdrawn enters the silent mode in which there is no utterance, or if there is a voice request queue, the voice granting terminal of the terminals included in the queue has a high voice giving priority, You can control to receive a grant after sending a grant message.
FIG. 4 is a diagram illustrating a process of granting a floor right after a floor holding time in a floor control method for a push to talk service in a mobile communication environment according to the present invention, wherein a floor holding time of a floor right granted to any floor giving terminal is limited And a voice is given to the next floor granting terminal.
First, the terminal 2 (12) requests the terminal 1 (11) serving as a talk arbitration terminal to make a voice request to receive a voice (S10).
The terminal 2 (12) having received the floor request receives the floor grant message from the terminal 1 (11) and receives the floor right (S12).
The terminal 2 (12) transmits the voice media data to the terminal group through the utterance, and the push-to-talk service is performed. Meanwhile, the terminal 2 (12) requests the voice command from the terminal 3 (13) (S14).
The
On the other hand, FIG. 5 shows an operation in which the user does not give a floor right to another terminal but maintains the floor, even when the time for which the floor is held.
FIG. 5 is a diagram illustrating a process of maintaining a voice right after a talk time holding time in a voice control method for a push-to-talk service in a mobile communication environment according to the present invention.
First, the terminal 2 (12) requests the terminal 1 (11) serving as a talk arbitration terminal to make a floor request (S20).
In step S22, the terminal 2 (12) having received the floor request receives the floor grant message from the terminal 1 (11) and receives the floor right (S22).
The voice media data is transmitted to the terminal group during the talk time holding period (Td) to perform speech.
If there is no request for speaking after the lapse of the talk time holding time or if there is a request for speaking from the terminal having the loud voice giving priority, the terminal 2 (12) may be given the floor again and perform the talk (S24).
After the lapse of the talk burst holding time, the terminal 2 (12) implicitly extends the talk burst grant time to the same time size as the talk burst holding time that was initially given, maintains the talk burst, transmits the floor grant message or the floor taken message, 12) can be informed to other terminals through a message that they have been given voice.
6 and 7 illustrate operation examples that can be performed by the speech receiving terminal after the lapse of the talk holding time through the present invention, respectively.
FIG. 6 is a diagram illustrating an operation of a speech receiving terminal after a talk burst holding time according to an embodiment of the method of controlling a talk burst for a push to talk service in a mobile communication environment of the present invention. Respectively.
First, the terminal 2 (12) requests the terminal 1 (11) serving as a talk arbitration terminal to have a voice (S30).
The terminal 2 (12) having received the floor request receives the floor grant message from the terminal 1 (11) and receives the floor right (S32).
If there is no transmission of a floor grant message, a floor taken message, a floor release message or the like in the
Referring to FIG. 6, if there is no floor request even after the lapse of the talk time holding time, the terminals in the group can perform the operation of switching to the silent mode in which all the talk is absent (S34).
After switching to the silent mode, the terminals perform a floor request process based on contention when a floor request is required. In this case, the floor granting method in the competition-based floor request can be given in consideration of factors such as the priority of granting the floor grant.
7 is a diagram illustrating an operation of a speech receiving terminal after a talk time holding time according to another embodiment in a voice control method for a push to talk service in a mobile communication environment of the present invention.
First, the terminal 2 (12) requests the terminal 1 (11) serving as a talk arbitration terminal to have a voice (S40).
The terminal 2 (12) having received the floor request receives the floor grant message from the terminal 1 (11) and receives the floor right (S42).
7, voice media data transmission is performed to each terminal by the terminal 2 (12) during the talk time holding time (Td) (S44), and after the talk time holding time elapses, , The terminal 3 (13) can perform the operation of being given the floor, when the terminal 3 (13) higher than the terminal 3 (13) requests the floor.
In step S46, the terminal 3 (13) that has been given the voice command transmits the voice media data to the terminals in the terminal group, and further transmits a floor grant message to inform that the voice is granted.
As described above, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are to be considered in all respects only as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and from the equivalent concept are to be construed as being included in the scope of the present invention.
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Claims (14)
The talk right is controlled by inter-terminal communication in the terminal group including the talk right arbitration terminal that gives the talk, the talk grant grant terminal that receives the talk right from the talk grant arbitration terminal, and the speech reception terminal that receives the media data from the talk grant grant terminal But,
When the talk time granting time period previously set in the talk grant grant terminal has elapsed, the talk grant arbitration terminal selects the next talk grant grant terminal to grant a talk right,
Wherein the floor granting terminal functions as a next floor grant arbitration terminal capable of selecting a next floor grant terminal when receiving a floor grant from the floor arbitration terminal,
A voice control method for a push to talk service in a mobile communication environment.
And when the talk right is given from the talk grant arbitration terminal, the talk talk session holding time is provided.
And transmitting a floor grant message including the talk time holding time to each terminal when giving a floor right to the floor right granting terminal.
When the next floor granting terminal is selected after the lapse of the talk burst holding time, if there is no talk burst request queue including information about the terminals for which the floor talk request has been requested, or if the terminal included in the talk burst request queue has priority over talk grant priority And when it is determined that the rank is low, the talk right of the current talk granting terminal is maintained.
A talk control right control method for a push to talk service in a mobile communication environment, wherein a talk time is implicitly extended to an initially set talk time holding time without a separate message transmission by a setting, and the talk right is maintained.
a floor grant message or a floor taken message to extend the floor holding time to the initial floor holding time and to maintain the floor, and a floor right control method for the push to talk service in the mobile communication environment.
When the next floor granting terminal is selected after the lapse of the talk burst holding time, the floor request queue including the information about the terminals for which the floor talk request has been made is present and the terminal included in the floor talk request queue has the floor grant priority higher than the current floor grant terminal And when it is determined that the terminal is higher or equal, selects the terminal as the next floor granting terminal.
Wherein the talk priority is set in advance in consideration of the talk grant grant priority, the talk session holding time proposed when the talk request is requested, or the maximum allowable talk session holding time set in advance.
Storing the floor holding time after receiving the floor grant message transmitted from the floor arbitration terminal,
A floor control method for a push-to-talk service in a mobile communication environment, when it is determined that the floor of the present floor granting terminal is terminated if a message informing of the floor speaking end is not received from the floor granting terminal after the lapse of the floor holding time .
When the floor grant message is not received or the floor taken message or the floor release message is not received after the lapse of the talk burst holding time, it is determined that the talk right of the floor granting terminal is terminated, the push to talk service in the mobile communication environment And
And when the talk burst granting terminal does not receive a message for notifying the talk burst granting end and there is no talk burst request queue, switches to the silent mode in which all of the talk bursts are not made, the talk burst burst control method for the push to talk service in the mobile communication environment.
The terminal having the highest voice grant priority among the terminals included in the queue is granted voice when the voice guidance request queue is not received from the voice grant terminal,
Wherein the floor granting terminal having been granted the floor right notifies the terminals in the group that the floor taken message or the floor grant message has been given to the floor to receive the floor right.
When a talk burst request queue is not received from the talk granting terminal and a talk burst request queue is not received and the terminal having the highest talk burst grant priority among the terminals included in the queue is determined to be given a talk burst, A method for controlling a floor for a service.
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020150128325A KR101672746B1 (en) | 2015-09-10 | 2015-09-10 | Method of floor control for push to talk in mobile communication network |
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| KR1020150128325A KR101672746B1 (en) | 2015-09-10 | 2015-09-10 | Method of floor control for push to talk in mobile communication network |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108271124A (en) * | 2016-12-30 | 2018-07-10 | 普天信息技术有限公司 | The distribution method of right of speech, cluster core net and dispatching desk in group-calling service |
| KR101904995B1 (en) * | 2017-01-16 | 2018-11-21 | (주)사이버텔브릿지 | Method for getting right to speak in push-to-talk service using device-to-device communication |
| US10880696B2 (en) | 2017-12-18 | 2020-12-29 | Samsung Electronics Co.. Ltd. | Terminal participating in group call established based on MCPTT service and method of operating the terminal |
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| KR20060075582A (en) * | 2004-12-28 | 2006-07-04 | 엘지전자 주식회사 | Method for controlling right to speak of push to talk service |
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| CN108271124A (en) * | 2016-12-30 | 2018-07-10 | 普天信息技术有限公司 | The distribution method of right of speech, cluster core net and dispatching desk in group-calling service |
| CN108271124B (en) * | 2016-12-30 | 2021-08-06 | 普天信息技术有限公司 | Distribution method of speaking right in group calling service, cluster core network and dispatching desk |
| KR101904995B1 (en) * | 2017-01-16 | 2018-11-21 | (주)사이버텔브릿지 | Method for getting right to speak in push-to-talk service using device-to-device communication |
| US10880696B2 (en) | 2017-12-18 | 2020-12-29 | Samsung Electronics Co.. Ltd. | Terminal participating in group call established based on MCPTT service and method of operating the terminal |
| US11412354B2 (en) | 2017-12-18 | 2022-08-09 | Samsung Electronics Co., Ltd. | Terminal participating in group call established based on MCPTT service and method of operating the terminal |
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