CN101729994A - Call control method of public network IP trunked communication system - Google Patents
Call control method of public network IP trunked communication system Download PDFInfo
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- CN101729994A CN101729994A CN200810218407A CN200810218407A CN101729994A CN 101729994 A CN101729994 A CN 101729994A CN 200810218407 A CN200810218407 A CN 200810218407A CN 200810218407 A CN200810218407 A CN 200810218407A CN 101729994 A CN101729994 A CN 101729994A
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Abstract
The invention discloses a call control method of a public network trunked communication system. When a calling user presses a PTT button, a terminal assembles a call request signaling and voice data in the same data packet and sends the data packet to a call control server; and the call control server determines the distribution of call control right according to call priorities. The invention reduces a bidirectional signaling negotiation process so as to effectively reduce call delay time and overcome the defect that a POC (Push-to-Talk.over.Cellular) system has big call delay time, so that the key index, namely talk delay time, that a user of the public network IP trunked communication system experiences, reaches a practical level.
Description
Technical field
The present invention relates to moving communicating field.Relate in particular to a kind of call control method of public network IP trunked communication system.
Background technology
Trunked communication system, has obtained using widely in worldwide for the user provides the means of group communication efficiently as special command dispatching system.Semiduplex working method is adopted in trunking communication, when group user is pressed PTT (Push-to Talk, push-to-talk key), just can realize the group call of one-to-many.The conventional cluster communication system is the private network construction mode, only limits to specific industries such as public security, army, aviation, airport, uses in regional area.
Along with social progress, the flow of personnel enhancing, as logistics, 120, unit such as maritime affairs, tourist corporation is more and more stronger for the demand of the team's means of communication in the wide scope, and their often unable construction specialized networks.Along with the development of mobile communications network, based on existing mobile communications network,, provide cluster service in the value-added service mode by stack operation system equipment, can effectively satisfy the demand of popular client to trunking communication.Not only can utilize the infrastructure that has public mobile network now based on the IP group system of public network, realize that wide area covers, the business such as cluster conversation, phone, location of can also integrating simultaneously provide the client.
It is low to have construction cost based on the IP group system of public network, covers advantages such as wide, still, because IP cluster system data communication network realizes, has communication delay.Call delay is the central factor that influences user experience.The call delay of conventional cluster communication system and reaches 5s based on the PTT service call time delay of POC (push over Cellular) agreement in 300ms, do not possess practical ability.
Summary of the invention
Technical problem to be solved by this invention is, a kind of calling-control method that is applied to public network IP trunked communication system is provided, and to overcome the existing big defective of public network IP group system call delay, makes the public network IP group system possess practicality.
For achieving the above object, the present invention proposes a kind of calling-control method that is applied to public network IP trunked communication system, it is characterized in that comprising the steps:
A. public network IP colony terminal and call control server are set up IP and are communicated to connect, and from all attribute of user of call control server obtaining communication group and state information.
B. when the calling subscriber presses the group call key, calling terminal is assemblied in voiceband user and signaling information and is sent to call control server in the call request message.
C. the signaling information in the packet that transmits according to the calling subscriber of call control server, according to the calling privilege allocation strategy, whether decision distributes the calling control.If do not distribute, then return corresponding signaling message and give calling terminal; If accept, calling privilege then is set takies mark, query subscriber database is obtained other state of user of group and address information, and according to group information, user data is duplicated and is transmitted to other called user terminal in the group.
D. when the calling subscriber unclamps the group call key, calling terminal sends to call control server and calls out release signaling, after call control server is received and is called out release signaling, call release control busy flag, forwarded call simultaneously finishes signaling and gives other user of group.
The calling privilege allocation strategy is as follows:
(1) it is occupied to judge that at first the calling control marks whether, if unoccupied, then distributes the calling control to give the calling subscriber; If take, judge then whether group's priority of user is higher than the existing user who takies calling privilege, if low, then refusal distributes the calling control, and returns the call request failed message and give the calling subscriber, if high, then distribute and call out control, send simultaneously and call out intrusion message to former calling subscriber.
(2) different user press-to-talk key is arranged at one time when same group, then call control server will be called out control and distribute to high-priority users according to User Priority, and send the call request failed message to low priority user.
(3) group calling priority is higher than individual calling priority.
The calling-control method that the present invention proposes, make full use of the semiduplex conversation model of trunked call, by speech and signaling data are encapsulated in the same packet, adjudicate whether distribute calling privilege by call control server, reduced two-way command negotiation process, called out time-delay thereby effectively reduce.Press the PTT key from the user, to called subscriber's voice played, the conversation time delay is the propagation delay time and buffering time delay of packet.In existing cdma2000lx network and GPRS network, the propagation delay time of packet is about 700ms, that is the conversation time delay of trunked call is 700ms, makes the public network IP group system reach realistic scale.
Description of drawings
Fig. 1 is for using the call flow chart of the open call control method of public network IP trunked communication system of the present invention
Fig. 2 is the packet structure figure that call control method of public network IP trunked communication system disclosed by the invention adopted
Fig. 3 is the data packet head structure chart that call control method of public network IP trunked communication system disclosed by the invention adopted
Embodiment
The invention will be further described below in conjunction with embodiment:
The trunking communication group user is at first set up the IP data channel by dialing, and the login call control server obtains other state of user information (as address name, on-line state etc.) in the group, is shown in user terminal screen.
The user both can select group calling, promptly simultaneously all users in the group was conversed; Also can select a certain user to carry out individual calling, promptly only converse with a certain user.When a certain user wishes to initiate group call in the group, press the PTT key, begin speech simultaneously, if there is other voiceband user to play in its terminal, show its calling control application failure, the PTT of Panasonic key is abandoned this calling; If terminal is not play other voiceband user, show that then it obtains to call out control.
Fig. 1 is for using the call process prescription of public network IP trunked call control method disclosed by the invention.
101 calling subscribers press the PTT key, begin speech.The terminal session sound compresses, and simultaneously call request signaling and first section voice data is assembled into call request message, and the packet header of voice packets subsequently includes group call information.
102 call control servers are judged the packet that receives, if call request message judges then whether the calling control is occupied, if occupied, then changes 103 over to; If unoccupied, then change 104 over to.
103 judge whether calling subscriber's priority is higher than the priority that existing call power takies calling, if high, then distribute the calling control to give the calling subscriber, if low, then send the call request failed message to the calling subscriber, change 106. over to
104 distribute the calling control to give the calling subscriber, transmit calling subscriber's voice according to calling subscriber's type of call and give other user of group or a certain individual calling user.
105 after the user discharges the PTT key, and terminal is combined into call release message with last voice packets with calling out release signaling, and after call control server was received this message, the call release control was simultaneously to other user's forwarded call end of group.After other user terminal is received end of calling message, after playing speech, play the end of calling prompt tone.
106 end of callings
The packet structure that Fig. 2 is adopted for IP public network cluster communication system calling control method disclosed by the invention.It has data packet head structure 10 and voice data part 11 to constitute.
The data packet head structure that Fig. 3 is adopted for IP public network cluster communication system calling control method disclosed by the invention constitutes in detail.It is made of signaling message type blocks 110, signaling message content piece 111, caller ID piece 112, the ID of called subscriber group piece 113, type of call piece 114, speech coding type blocks 115, expansion type piece 116.The type number of signaling message type blocks 111 expression signalings is as call request, calling release, call failure indication, end of calling etc.Caller ID piece 112 mark users' identity information.The group information that the ID of called subscriber group piece 113 marks are exhaled, call control server is according to this information retrieval called subscriber group data.114 indications of type of call piece are group calling or individual calling.The speech coding type that speech coding type blocks 115 indicating call sides take supplies the called corresponding coding/decoding method of choosing.Expansion type piece 116 is for reserving purposes.
Claims (6)
1. a call control method of public network IP trunked communication system is applied to the IP trunked communication system based on public mobile network (GSM, CDMA), it is characterized in that, may further comprise the steps:
A. public network IP colony terminal and call control server are set up IP and are communicated to connect, and from all attribute of user of call control server obtaining communication group and state information.
B. when the calling subscriber presses the group call key, calling terminal is assemblied in voiceband user and signaling information and is sent to call control server in the call request message.
C. the signaling information in the packet that transmits according to the calling subscriber of call control server, according to the calling privilege allocation strategy, whether decision distributes the calling control.If do not distribute, then return corresponding signaling message and give calling terminal; If accept, calling privilege then is set takies mark, query subscriber database is obtained other state of user of group and address information, and according to group information, user data is duplicated and is transmitted to other called user terminal in the group.
D. when the calling subscriber unclamps the group call key, calling terminal sends to call control server and calls out release signaling, after call control server is received and is called out release signaling, call release control busy flag, forwarded call simultaneously finishes signaling and gives other user of group.
2. call control method of public network IP trunked communication system according to claim 1 is characterized in that among the described step b, call request message comprises call request signaling data and user's voice data.If call control server distributes calling privilege to give the calling subscriber, then directly voice data is transmitted to the called subscriber, thereby greatly reduces the trunked call time delay.
3. as call control method of public network IP trunked communication system as described in the right request 1, it is characterized in that among the described step c, the calling privilege allocation strategy is as follows:
(1) it is occupied to judge that at first the calling control marks whether, if unoccupied, then distributes the calling control to give the calling subscriber; If take, judge then whether group's priority of user is higher than the existing user who takies calling privilege, if low, then refusal distributes the calling control, and returns the call request failed message and give the calling subscriber, if high, then distribute and call out control, send simultaneously and call out intrusion message to former calling subscriber.
(2) different user press-to-talk key is arranged at one time when same group, then call control server will be called out control and distribute to high-priority users according to User Priority, and send the call request failed message to low priority user.
(3) group calling priority is higher than individual calling priority.
4. as call control method of public network IP trunked communication system as described in the right request 1, it is characterized in that, group with having the priority characteristic per family, can judge group's priority and User Priority according to attribute of user ID.When the user belonged to different group, preferentially the speech with high priority group was transmitted to this user.
5. as call control method of public network IP trunked communication system as described in the right request 1, it is characterized in that the call request signaling in the call request message comprises following content: caller ID, the called ID of group, speech coding type, type of call.Wherein, the speech coding type comprises low code check voice coding methods such as CELP, MELP, AMR.Type of call comprises types such as group calling, individual calling, dispatch call.
6. as call control method of public network IP trunked communication system as described in the right request 1, it is characterized in that signaling and voice packets data are based on the IP communication mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810218407A CN101729994A (en) | 2008-10-17 | 2008-10-17 | Call control method of public network IP trunked communication system |
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| CN200810218407A CN101729994A (en) | 2008-10-17 | 2008-10-17 | Call control method of public network IP trunked communication system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101938708A (en) * | 2010-08-19 | 2011-01-05 | 浙江元亨通信技术有限公司 | Method for realizing wireless cluster communication based on mobile phone terminals |
| CN101951302A (en) * | 2010-09-09 | 2011-01-19 | 天津七一二通信广播有限公司 | Processing method for realizing forcibly inserting signaling into voice conversation |
| CN102572725A (en) * | 2012-01-19 | 2012-07-11 | 杭州承联通信技术有限公司 | Trunking communication system PTT (push-to-talk) authorization method capable of effectively reducing authorization delay |
| CN105357650A (en) * | 2015-10-30 | 2016-02-24 | 深圳市康凯斯信息技术有限公司 | Intelligent mobile digital intercom method, server and system |
| CN106535140A (en) * | 2015-09-15 | 2017-03-22 | 深圳市中兴微电子技术有限公司 | Group call control method and group call control device |
| CN106535141A (en) * | 2016-11-15 | 2017-03-22 | 中南民族大学 | Method for realizing POC real-time intercom of intelligent patrol system |
-
2008
- 2008-10-17 CN CN200810218407A patent/CN101729994A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101938708A (en) * | 2010-08-19 | 2011-01-05 | 浙江元亨通信技术有限公司 | Method for realizing wireless cluster communication based on mobile phone terminals |
| CN101951302A (en) * | 2010-09-09 | 2011-01-19 | 天津七一二通信广播有限公司 | Processing method for realizing forcibly inserting signaling into voice conversation |
| CN101951302B (en) * | 2010-09-09 | 2013-07-10 | 天津七一二通信广播有限公司 | Processing method for realizing forcibly inserting signaling into voice conversation |
| CN102572725A (en) * | 2012-01-19 | 2012-07-11 | 杭州承联通信技术有限公司 | Trunking communication system PTT (push-to-talk) authorization method capable of effectively reducing authorization delay |
| CN106535140A (en) * | 2015-09-15 | 2017-03-22 | 深圳市中兴微电子技术有限公司 | Group call control method and group call control device |
| CN105357650A (en) * | 2015-10-30 | 2016-02-24 | 深圳市康凯斯信息技术有限公司 | Intelligent mobile digital intercom method, server and system |
| CN105357650B (en) * | 2015-10-30 | 2019-04-12 | 深圳市康凯斯信息技术有限公司 | Intelligent mobile digital intercom method, server and system |
| CN106535141A (en) * | 2016-11-15 | 2017-03-22 | 中南民族大学 | Method for realizing POC real-time intercom of intelligent patrol system |
| CN106535141B (en) * | 2016-11-15 | 2017-09-29 | 中南民族大学 | A kind of real-time intercommunication implementation methods of POC towards intelligent inspection system |
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Open date: 20100609 |