CN102572725A - Trunking communication system PTT (push-to-talk) authorization method capable of effectively reducing authorization delay - Google Patents
Trunking communication system PTT (push-to-talk) authorization method capable of effectively reducing authorization delay Download PDFInfo
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- CN102572725A CN102572725A CN2012100165895A CN201210016589A CN102572725A CN 102572725 A CN102572725 A CN 102572725A CN 2012100165895 A CN2012100165895 A CN 2012100165895A CN 201210016589 A CN201210016589 A CN 201210016589A CN 102572725 A CN102572725 A CN 102572725A
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Abstract
The invention provides a posterior PTT (push-to-talk) authorization mechanism. After a user presses down a PTT key, the direct emission is performed without PTT authorization, and the user monitors a downlink channel which is emitted to the wireless user by a monitoring system at the emission initial stage simultaneously; when receiving a signal emitted by the user and judging that the talk to the user is allowed, the system feeds back a posterior authorization signaling to the user at the downlink channel; and correspondingly, the user continues emission after receiving the own PTT posterior authorization signaling, and the user automatically stops emission of subsequent voice message if the own PTT posterior authorization signaling is not received in preset time or a PTT posterior authorization signaling for others is received. When multiple users press PTT for talking at the same time, the system gives the posterior PTT authorization signaling to only one of the users. According to the invention, the PTT authorization and the voice emission are subjected to parallel processing, and the independent PTT authorization time is eliminated, so that the talk delay can be reduced.
Description
Technical field
The present invention relates to a kind of PTT authorization method, especially a kind of PTT authorization method of trunked communication system, special, be that a kind of can effectively the minimizing authorized the trunked communication system PTT authorization method of delaying time.
Background technology
Wireless trunking communication system is the professional GSM that a kind of wireless channel is shared; Form by system's (comprising equipment such as base station, switching control center) and user terminal (intercom), mainly converse, the conversation of full duplex also can be provided with half-duplex mode; Has the fireballing advantage that continues; It can not only provide man-to-man individual calling, and the group calling of one-to-many can also be provided on a wireless channel, is widely used in industries such as public security, army at home and abroad and carries out command scheduling.
PTT (push-to-talk is by saying) is a kind of basic mode of operation of intercom.In general, intercom adopts the half-duplex call mode, and under this mode, the general work state of intercom in communication process is received speech signal, and when certain user will talk, the PTT key that need press on the intercom could be launched voice signal.And for the talking mode of full duplex, an intercom can transmit and receive simultaneously, and the user need not the key by PTT, also can talk and launches voice signal.
Except above-mentioned man-to-man calling with reply the situation, also have a kind of situation that is called group calling, promptly; Synchronization has a plurality of wireless users, at this moment on same wireless channel; Intercom can only be operated in the half-duplex call mode, that is to say, the user only could talk after pressing the PTT key.In this applicable cases through regular meeting the situation that the multi-user talks simultaneously appears; When the user more than two or two presses the speech of PTT key simultaneously; These users' intercom will be launched simultaneously; And then produce interference each other, consequently, all users can't hear the sound of any one speaker.
For fear of above-mentioned situation occurring, the mechanism that existing wireless trunking communication system has generally adopted a kind of PTT of being called to authorize is in the communication process of group calling; Speaker is at first sent PTT request, the response of waiting system then, and system receives that PTT request back is according to receiving that the time of request or user's authority can give some subscriber authorisations; Intercom is received and is authorized the back to judge if then can talk for the mandate of oneself and launch voice signal; If give other people,, all transfer pressure to accepting state to listen to no matter whether the user pins the PTT key this moment; Avoid robbing words and caused interference each other, guaranteed carrying out in order of conversation.Popular saying is exactly that the user will raise one's hand to make a speech, and can not want just to say and lift up one's voice.
This PTT authorization is used in wireless trunking communication system often, and is also very effective.But owing to before the speech PTT licensing process is arranged; User's speech has two time-delays: the one, and the time-delay of air interface; Another be from the base station to the time-delay of the Network Transmission of PTT authorization control device, these time-delays are added up usually at the hundreds of millisecond, have had a strong impact on user's communication effect.
Therefore, hoping has a kind of PTT authorization, can guarantee Methodistic conversation, does not produce interference each other, can effectively reduce the time-delay that PTT authorizes again.
Summary of the invention
The object of the present invention is to provide a kind ofly can guarantee Methodistic MPTY, the phase mutual interference when not producing conversation again between the user when prior, can also effectively reduce the trunked communication system PTT authorization method that PTT authorizes time-delay.
In order to achieve the above object, first technical scheme that the present invention adopted is:
A kind of single cluster of base stations communication system PTT authorization method comprises the steps:
(S001) mobile station MS is pressed the PTT key, and launches a voice messaging;
(S002) base station BS at described mobile station MS place is made and being judged and feedback after receiving described voice messaging;
(S003) if described mobile station MS is received the authorization signaling of described base station BS feedback in setting-up time, then continue the follow-up voice messaging of emission, otherwise, stop to launch follow-up voice messaging.
Technique scheme can also be further perfect:
As preferably, when a described base station BS was received the voice messaging of a plurality of described mobile station MSs transmissions, the described mobile station MS of sequencing selection that then arrives according to described voice messaging was to its feedback authorization signaling.
As preferably, in described step S001, after mobile station MS is pressed the PTT key, also comprise according to downlink signaling judging whether the step that other mobile station MSs are being talked, if there are not other mobile station MS speeches, then send described voice messaging.
As preferably, in described step S003, the described travelling carriage (MS) of in setting-up time, not receiving the authorization signaling of described base station (BS) feedback also sends forbids launching prompt tone.
Second technical scheme that the present invention adopted is:
A kind of cluster of base stations communication system PTT authorization method of striding comprises following steps:
(S001) the selected mobile station MS that inserts this base station BS of base station BS is as the talker;
(S002) voice messaging of the described mobile station MS that will select of described base station BS sends to correlation reception side, also through signalling path the talk request of described mobile station MS is issued to PTT authorization control device PTTC simultaneously;
(S003) described PTT authorization control device PTTC feeds back to a selected base station BS with authorization signaling, and notice needs to participate in other base station BSs of conversation this time.
Technique scheme can also be further perfect:
As preferably; When described PTT authorization control device PTTC receives the talk request of the mobile station MS that a plurality of described base station BSs send; The sequencing or the user class that then arrive according to described voice messaging are selected a described base station BS, to its feedback authorization signaling.
As preferably, technique scheme also further comprises the steps:
(S004) in the time of setting, do not receive described authorization signaling or receive that the described base station BS of other people authorization signaling stops outwards to send voice messaging.
As preferably; In described step S001, before the voice messaging of the described mobile station MS that described base station BS will be selected is sent to correlation reception side, also should judge whether the step that other base station BSs are being talked; Do not talk if there are other base station BSs, then send described voice messaging.
As preferably, described PTT authorization control device PTTC is served as by described group ownership switching control center MSC when group calling, and the switching control center MSC by the calling party when individual calling serves as.
The 3rd technical scheme that the present invention adopted is:
A kind of trunked communication system of using above-mentioned two kinds of described PTT authorization methods of technical scheme; Comprise at least one base station BS; Each described base station BS all inserts at least one mobile station MS; It also comprises at least one switching control center MSC, and described base station BS inserts a described switching control center MSC through bearer network; It also comprises a network management center, and described switching control center MSC inserts described network management center through bearer network.
Because the employing of technique scheme, the present invention compared with prior art has the following advantages:
The present invention has changed need obtain the authorization in advance in the prior art and can send this common method of voice messaging, has creationaryly proposed a kind of licensing scheme of PTT afterwards.Promptly; After user's (travelling carriage) presses the PTT key; Can directly launch without PTT authorizes, the user the emission initial stage simultaneously surveillance to the down channel of wireless user's emission, when system receive this user's emission signal, and judge and can open when conversing to it; Then feed back to one of this user authorization signaling afterwards at down channel; Accordingly, if this user receive to just continuing the follow-up voice messaging of emission behind the authorization signaling of PTT afterwards of oneself, if in setting-up time, can not receive PTT authorization signaling or receive PTT authorization signaling then stop to launch follow-up voice messaging automatically afterwards afterwards to other people to oneself.Through above-mentioned licensing scheme, when a plurality of users pressed the PTT speech simultaneously, system only can give one of them user PTT authorization signaling afterwards, and other user will stop emission automatically.PTT is authorized this authorization of PTT afterwards and voice transmission has been carried out parallel processing, eliminated independent PTT and authorized the time, so can reduce the time-delay of speech.
Description of drawings
Fig. 1 is a kind of trunked communication system network diagram of the present invention;
Fig. 2 is a kind of single base station of the present invention message related to calls precedence diagram, does not rob speech phase for having shown in the figure;
Fig. 3 is a kind of single base station of the present invention message related to calls precedence diagram, shown in the figure for robbing speech phase;
Fig. 4 is a kind of base station message related to calls precedence diagram of striding of the present invention, does not rob speech phase for having shown in the figure;
Fig. 5 is a kind of base station message related to calls precedence diagram of striding of the present invention, shown in the figure for robbing speech phase.
Embodiment
Below in conjunction with accompanying drawing, specific embodiments of the invention explains further details.
Shown in Fig. 1 ~ 5; When calling out; By a PTT authorization control device (serve as by the ownership switching control center of group number usually during group calling, serve as by calling party's switching control center usually during individual calling), a plurality of base station with there are a plurality of travelling carriages that are distributed in each base station to participate in.PTT during conversation authorizes and is divided into secondary: at first, each base station has been decided a speaker of this base station earlier, and PTT authorization control device has decided the speaker of a base station conduct again from the request of a plurality of base stations then.
The process that a speaker has been decided in the base station is comparatively complicated, also is key point of the present invention.Its principle is after certain user (travelling carriage) presses the PTT key, directly to launch without the PTT mandate; This user is at the down channel of while at emission initial stage surveillance to wireless user's emission; When system receives the signal of this user's emission and passes through this user utterance of judgement agreement; Then give one of this user PTT authorization signaling afterwards at down channel, corresponding, if receiving to the own authorization signaling of PTT afterwards, this user continues to launch; On the contrary, if in setting-up time, can not receive PTT authorization signaling or receive PTT authorization signaling then stop subsequent transmission automatically afterwards afterwards to other people to oneself.Press the PTT speech simultaneously as a plurality of users, system only can give one of them user PTT authorization signaling afterwards, and other user will stop emission automatically.PTT is authorized this authorization of PTT afterwards and voice transmission has been carried out parallel processing, eliminated independent PTT and authorized the time, so can reduce the time-delay of speech.The above-mentioned licensing scheme of PTT afterwards both had been applicable to that man-to-man individual calling also was applicable to group calling.
Further specify through the embodiment specific embodiments of the invention below.
Trunked communication system as shown in Figure 1; Comprise at least one base station BS; Each described base station BS all inserts at least one mobile station MS, it is characterized in that: it also comprises at least one switching control center MSC, and described base station BS inserts a described switching control center MSC through bearer network.In addition, trunked communication system also comprises a network management center, and described switching control center MSC inserts described network management center through bearer network.
Embodiment 2
As shown in Figure 2, after the call setup, at first all users' of hypothesis participation calling current state is and rings off; After this, some users are like MS1; Setting it is an intercom, needs speech, so; The user who handles this intercom just presses the PTT key of intercom, and intercom MS1 judges that according to downlink signaling unmanned speech just launches voice head and voice, and at the down control channel (logic channel) of emission initial stage surveillance (base station) feedback; After the voice head and voice of intercom MS1 emission received by system (base station), the PTT that sends intercom MS1 at down control channel (logic channel) authorized, and on downlink traffic channel, transmitted the voice of intercom MS1 simultaneously; MS1 receives after PTT authorizes can continue speech, and so far, PTT authorizes completion.
Embodiment 3
As shown in Figure 3; After the call setup; At first all users' of hypothesis participation calling current state is and rings off; As user MS1 and user MS2 (supposing that MS1 and MS2 are intercom) when all wanting to talk; The operator of the two just might be simultaneously by the PTT key of intercom separately, these two users' intercom judges that according to downlink signaling unmanned speech just launches voice head and voice, if the two is at same time slot emission voice head and voice; System (base station) then might just can not receive effective voice head and voice (if the signal strength differences of the two is bigger because of the two phase mutual interference; Then might weak signal form not the interference to strong signal, the side's that signal is strong voice head and voice still can be received by system), user MS1 and user MS2 are at the down control channel (logic channel) of emission initial stage surveillance to user's emission simultaneously; This moment, system can not receive effective voice head and voice because of both sides' self phase mutual interference, just can not provide PTT at down control channel and authorize, and also can not transmit the voice of the two in Traffic Channel; User MS1 and user MS2 can not receive PTT and authorize in the time of setting, then stop emission, on intercom, send simultaneously to forbid launching prompt tone and be under an embargo with this speech of prompting user, carry out the PTT operation again; User 1 talks by the PTT key after can unclamping the PTT key with user 2 again.
Similar with embodiment 2; When user MS1 and user MS2 want to talk, the two just might be simultaneously by the PTT key of intercom separately, these two users' intercom judges that according to downlink signaling unmanned speech just launches voice head and voice; One or more time slot emission voice heads and voice if the two staggers; If user MS1 is than the fast time slot emission of user MS2, user MS1 voice head and voice will be received by system, and voice head and the voice of user MS2 can be disturbed; System just receives behind the voice head of user MS1 that the PTT that feeds back to user MS1 at down control channel (logic channel) authorizes; On downlink traffic channel, transmit the voice of user MS1 simultaneously, user MS1 receives after PTT authorizes can continue speech, and user MS2 just stops emission and transfers accepting state to after receiving the PTT authorization signaling of system to user MS1; So far, PTT authorizes and accomplishes.
Embodiment 4
As shown in Figure 4; When the calling of participating in by a plurality of base station BSs; Have a PTT authorization control device PTTC as PTT authorization control side; Carry out PTT and authorize, this PTT authorization control device PTTC is served as by the ownership switching control center MSC of this group when group calling usually, when individual calling, is served as by calling party's switching control center MSC usually.
Do not robbing between base station BS under the situation of words, the method that certain base station BS is authorized through PTT has afterwards decided the talker of this base station BS earlier, for example allows user MS1 speech; The base station sends to correlation reception side with the voice of user MS1 then, also through signalling path the talk request of user MS1 is issued PTT authorization control device PTTC simultaneously; PTT authorization control device PTTC receives that feeding back to this base station BS through signalling path after the talk request of user MS1 allows user's 1 speech, and participates in through the signalling path notice that the relevant base station BS of this time calling is current to have allowed user MS1 speech; So far, the PTT between base station BS authorizes and accomplishes.
Embodiment 5
As shown in Figure 5, under the situation that the words of robbing are arranged between the base station, each base station has been decided the talker of this base station earlier through the method for PTT mandate afterwards, and for example base station BS 1 allows user MS1 speech, and base station BS 2 allows user MS4 speech; Base station BS 1 sends to correlation reception side with the voice of user MS1 then; Also the talk request of user MS1 is issued PTT authorization control device PTTC simultaneously through signalling path; Equally; Base station BS 2 sends to correlation reception side with the voice of user MS4, also through signalling path the talk request of user MS4 is issued PTT authorization control device PTTC simultaneously, after PTT authorization control device PTTC receives the talk request of base station BS1 and base station BS 2; Sequencing or user class according to the request of receiving provide the PTT mandate; If the request of base station BS 2 arrives earlier or receives that in the time of setting the user class of request and the MS4 of MS1 and MS4 is higher than the user class of MS1, then reply to base station BS 2 and allow user MS4 speech, and talk through the current user MS4 that allowed in relevant base station that the signalling path notice is participated in this time calling talk through signalling path; Base station BS 1 stops to send outward voice after receiving the signaling that allows user MS4 speech, and the down control channel (logic channel) of base station BS 1 through air interface requires user MS1 to ring off to transfer accepting state to simultaneously, and so far, the PTT between the base station authorizes and accomplishes.
Claims (10)
1. a single cluster of base stations communication system PTT authorization method is characterized in that, comprises the steps:
(S001) travelling carriage (MS) is pressed the PTT key, and launches a voice messaging;
(S002) base station (BS) at described travelling carriage (MS) place is made and being judged and feedback after receiving described voice messaging;
(S003) if described travelling carriage (MS) is received the authorization signaling of described base station (BS) feedback in the time of setting, then continue the follow-up voice messaging of emission, otherwise, stop to launch follow-up voice messaging.
2. single cluster of base stations communication system PTT authorization method according to claim 1; It is characterized in that: when the voice messaging of a plurality of described travelling carriages (MS) transmission is received in a described base station (BS); The sequencing that then arrives according to described voice messaging is selected a described travelling carriage (MS), to its feedback authorization signaling.
3. single cluster of base stations communication system PTT authorization method according to claim 1; It is characterized in that: in described step S001; After travelling carriage (MS) is pressed the PTT key; Also comprise according to downlink signaling judging whether the step that other travelling carriages (MS) are being talked,, then send described voice messaging if there is not other travelling carriages (MS) speech.
4. single cluster of base stations communication system PTT authorization method according to claim 1; It is characterized in that: in described step S003, the described travelling carriage (MS) of in setting-up time, not receiving the authorization signaling of described base station (BS) reflection also sends forbids launching prompt tone.
5. stride cluster of base stations communication system PTT authorization method for one kind, it is characterized in that, comprise following steps:
(S001) base station (BS) selected travelling carriage (MS) that inserts this base station (BS) is as the talker;
(S002) voice messaging of described base station (BS) the described travelling carriage (MS) that will select sends to correlation reception side, also through signalling path the talk request of described travelling carriage (MS) is issued PTT authorization control device (PTTC) simultaneously;
(S003) described PTT authorization control device (PTTC) feeds back to selected base station (BS) with authorization signaling, and notice is participated in other base stations (BS) of conversation this time.
6. the cluster of base stations communication system PTT authorization method of striding according to claim 5; It is characterized in that; When described PTT authorization control device (PTTC) is received the talk request of sending a plurality of described base stations (BS); The sequencing or the user class that then arrive according to described solicited message are selected a described base station (BS), to its feedback authorization signaling.
7. the cluster of base stations communication system PTT authorization method of striding according to claim 6 is characterized in that, also further comprises the steps:
(S004) in the time of setting, do not receive described authorization signaling or receive that the described base station (BS) of other people authorization signaling stops outwards to send voice messaging that the travelling carriage (MS) of request transmission information sends forbids launching prompt tone.
8. the cluster of base stations communication system PTT authorization method of striding according to claim 6; It is characterized in that; In described step S001, before the voice messaging of the described travelling carriage (MS) that described base station (BS) will select sends, also should judge whether the step of talking in other base stations (BS); Do not talk if there are other base stations (BS), then send described voice messaging.
9. the cluster of base stations communication system PTT authorization method of striding according to claim 5; It is characterized in that; Described PTT authorization control device (PTTC) is served as by described group ownership switching control center (MSC) when group calling, when individual calling, is served as by calling party's switching control center (MSC).
10. the trunked communication system of an application such as claim 1 or 5 described PTT authorization methods; Comprise at least one base station (BS); At least one travelling carriage (MS) is all inserted in each described base station (BS); It is characterized in that: it also comprises at least one switching control center (MSC), and described base station (BS) inserts a described switching control center (MSC) through bearer network; And a network management center, described switching control center (MSC) inserts described network management center through bearer network.
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Application publication date: 20120711 |