CN103079173B - PTT (Push-To-Talk) collision avoidance method for center-free commanding and dispatching communication system - Google Patents
PTT (Push-To-Talk) collision avoidance method for center-free commanding and dispatching communication system Download PDFInfo
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- CN103079173B CN103079173B CN201210580393.9A CN201210580393A CN103079173B CN 103079173 B CN103079173 B CN 103079173B CN 201210580393 A CN201210580393 A CN 201210580393A CN 103079173 B CN103079173 B CN 103079173B
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Abstract
The invention discloses a PTT (Push-To-Talk) collision avoidance method for a center-free commanding and dispatching communication system based on the IP (Internet Protocol). The PTT collision avoidance method comprises the following steps: a user A presses a PTT key and requires a PTT talk; a timer Tr is started and a software system of the user a broadcasts or multicasts a PTT request to a whole network; the software system of the user a can delay to wait for a certain waiting interval Tw to monitor whether PTT requests of other users reach or not during the time period; and if no any request of the other users reaches in the waiting interval Tw, the A is accessed to a service channel to indicate that the user can speak. The invention provides a PTT arbitration method applied to the center-free commanding and dispatching communication system; with the adoption of the method, a PTT arbitration central node does not need to exist in the network and the PTT request can be sent by all terminal users in the network; and the whole network avoids PTT collision based on a certain rule and authorizes the certain user to carry out PTT talk. Meanwhile, a multi-priority service is realized.
Description
Technical field
The present invention relates to a kind of PTT collision avoidances method, in particular to a kind of for IP-based non-stop layer commander
The PTT collision avoidance methods of dispatching communications subsystem.
Background technology
In command dispatching system, PTT is a kind of half-duplex traffic, i.e., the user for only pressing PTT keys could talk, its
His user can only answer, it is therefore necessary to which the right of speech preemption function of PTT is uniformly controlled, it is ensured that system is at any time only
There can be a people to be authorized for PTT PTTes push to talk.
In traditional command dispatching system, the arbitration function of PTT rights of speech is complete by some the center network element in network
Into, such as arbitration of digital group system PTT business may be completed by MSC, and the arbitration of IMS system PoC service is by PoC
What Server was completed, i.e., a Centroid is certainly existed in network, by arbitration pipe of the central point unification to PTT speaking rights
Reason.When multiple users press the application of PTT keys to talk simultaneously, the PTT requests of multiple users are sent to the arbitration Centroid,
The sequencing asked according to PTT by the Centroid, and the priority of user carries out comprehensive judgement, so as to determine PTT
Speaking right which user authorized.
As can be seen here, the PTT rights of speech arbitration in legacy system is completed by some Centroid, but for non-stop layer system
System, without any Centroid in network, it is impossible to perform unified arbitration management, it is impossible to as legacy system, converges all
Centroid is arrived in the PTT requests of user, then again by Centroid unitary arbitration, it is therefore necessary to find a kind of suitable for non-stop layer
The PTT right of speech referee methods of command dispatching system.
The content of the invention
It is an object of the invention to overcome the problem above that prior art is present, there is provided one kind is used for non-stop layer command scheduling
The PTT collision avoidance methods of communication system.
To realize above-mentioned technical purpose, above-mentioned technique effect is reached, the present invention is achieved through the following technical solutions：
A kind of PTT collision avoidance methods for non-stop layer command dispatching and communication system, comprise the following steps：
Step one) party A-subscriber presses PTT keys, and request PTT speeches start intervalometer Tr, and the software system of party A-subscriber is to the whole network
Broadcast or multicast PTT is asked；
Step 2) software system of party A-subscriber can postpone to wait certain wait interval Tw, and whether monitor has in this period
The PTT requests of other users are reached, if waiting the requests of the PTT without any other user in the Tw of interval to reach, A connects industry
Business channel, instruction user can talk, if waiting the PTT requests that party B-subscriber is received in the Tw of interval, into next step；
Step 3) if waiting the PTT requests that party B-subscriber is received in the Tw of interval, judged, if party B-subscriber's is preferential
Level is higher than party A-subscriber, then party A-subscriber stops PTT wait flow processs, directly switchs to the state of answering, and prepares the voice packet for receiving party B-subscriber, no
Then enter next step；
Step 4) if the priority of party B-subscriber is less than party A-subscriber, the PTT requests to party B-subscriber are disregarded, and are directly abandoned,
Priority otherwise then for party B-subscriber is equal to party A-subscriber, then A is random within the O-Td time periods makes a concession a period of time Ta, initiates again
PTT is asked, return to step two.
Further, the intervalometer Tr described in step one, from the beginning of PTT buttons, if user does not have always within the Tr times
Have acquisition PTT speaking rights, then explanation there occurs that PTT seizes conflict, now the software system of party A-subscriber no longer carry out any PTT ask
Transmission is asked, and points out user to discharge PTT buttons.
Further, according to the transmission delay of network, the time is more than in network for the wait interval Tw described in step 2
One-way transmission time delay between what 2 points, that is, ensure within the Tw time periods, any unicast, multicast, broadcast, the mesh in network
Node can receive.
Further, the time Td described in step 4 is spaced Tw more than waiting, it is to avoid the conflict again of PTT buttons.
Further, the intervalometer Tr timings 1-2 seconds.
The invention has the beneficial effects as follows：
The present invention proposes a kind of PTT referee methods for being applied to non-stop layer command dispatching and communication system, with it, net
PTT arbitration Centroids are need not necessarily exist in network, all of terminal use can send PTT requests in network, the whole network is based on one
Fixed rule avoids PTT from colliding, and authorizes a certain user to carry out PTT speeches.Also achieve multipriority business simultaneously.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of description, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail as after.
The specific embodiment of the present invention is shown in detail in by following examples and its accompanying drawing.
Description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this
Bright schematic description and description does not constitute inappropriate limitation of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 PTT collision avoidances method flow schematic diagrams of the present invention.
Specific embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments describing the present invention in detail.
With reference to shown in Fig. 1, a kind of PTT collision avoidance methods for non-stop layer command dispatching and communication system, including it is following
Step：
Step one) party A-subscriber presses PTT keys, and request PTT speeches start intervalometer Tr, and the software system of party A-subscriber is to the whole network
Broadcast or multicast PTT is asked；
Step 2) software system of party A-subscriber can postpone to wait certain wait interval Tw, and whether monitor has in this period
The PTT requests of other users are reached, if waiting the requests of the PTT without any other user in the Tw of interval to reach, A connects industry
Business channel, instruction user can talk, if waiting the PTT requests that party B-subscriber is received in the Tw of interval, into next step；
Step 3) if waiting the PTT requests that party B-subscriber is received in the Tw of interval, judged, if party B-subscriber's is preferential
Level is higher than party A-subscriber, then party A-subscriber stops PTT wait flow processs, directly switchs to the state of answering, and prepares the voice packet for receiving party B-subscriber, no
Then enter next step；
Step 4) if the priority of party B-subscriber is less than party A-subscriber, the PTT requests to party B-subscriber are disregarded, and are directly abandoned,
Priority otherwise then for party B-subscriber is equal to party A-subscriber, then A is random within the O-Td time periods makes a concession a period of time Ta, initiates again
PTT is asked, return to step two.
Further, the intervalometer Tr described in step one, from the beginning of PTT buttons, if user does not have always within the Tr times
Have acquisition PTT speaking rights, then explanation there occurs that PTT seizes conflict, now the software system of party A-subscriber no longer carry out any PTT ask
Transmission is asked, and points out user to discharge PTT buttons.
Further, according to the transmission delay of network, the time is more than in network for the wait interval Tw described in step 2
One-way transmission time delay between what 2 points, that is, ensure within the Tw time periods, any unicast, multicast, broadcast, the mesh in network
Node can receive.
Further, the time Td described in step 4 is spaced Tw more than waiting, it is to avoid the conflict again of PTT buttons.
Further, the intervalometer Tr timings 1-2 seconds.
The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (5)
1. a kind of PTT collision avoidance methods for non-stop layer command dispatching and communication system, it is characterised in that including following step
Suddenly：
Step one) party A-subscriber presses PTT keys, and request PTT speeches start intervalometer Tr, and the software system of party A-subscriber is broadcasted to the whole network
Or multicast PTT requests；
Step 2) software system of party A-subscriber can postpone to wait certain wait interval Tw, and whether monitor in this period has other
The PTT requests of user are reached, if waiting the requests of the PTT without any other user in the Tw of interval to reach, A connects business letter
Road, instruction user can talk, if waiting the PTT requests that party B-subscriber is received in the Tw of interval, into next step；
Step 3) if waiting the PTT requests that party B-subscriber is received in the Tw of interval, judged, if the priority of party B-subscriber is high
In party A-subscriber, then party A-subscriber's stopping PTT wait flow processs, directly switch to the state of answering, and prepare the voice packet for receiving party B-subscriber, otherwise enter
Enter next step；
Step 4) if the priority of party B-subscriber is less than party A-subscriber, the PTT requests to party B-subscriber are disregarded, and are directly abandoned, otherwise
Then the priority for party B-subscriber is equal to party A-subscriber, then A is random within the O-Td time periods makes a concession a period of time Ta, and PTT is initiated again please
Ask, return to step two.
2. PTT collision avoidance methods for non-stop layer command dispatching and communication system according to claim 1, its feature exists
In：Intervalometer Tr described in step one, from the beginning of PTT buttons, if user never obtains PTT speeches within the Tr times
Power, then explanation there occurs that PTT seizes conflict, and now the software system of party A-subscriber no longer carries out any PTT requests transmission, and points out
User discharges PTT buttons.
3. PTT collision avoidance methods for non-stop layer command dispatching and communication system according to claim 1, its feature exists
In：, according to the transmission delay of network, the time is more than the list between any 2 points in network for wait interval Tw described in step 2
To transmission delay, that is, ensure that within the Tw time periods, any unicast, multicast, broadcast, the destination node in network can be received
Arrive.
4. PTT collision avoidance methods for non-stop layer command dispatching and communication system according to claim 1 or 3, it is special
Levy and be：Time Td described in step 4 is spaced Tw more than waiting, it is to avoid the conflict again of PTT buttons.
5. PTT collision avoidance methods for non-stop layer command dispatching and communication system according to claim 2, its feature exists
In：The intervalometer Tr timings 1-2 seconds.
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| CN105592426A (en) * | 2014-10-20 | 2016-05-18 | 中兴通讯股份有限公司 | Method and device for applying speaking right in PTT call and cluster core network |
| CN105811593B (en) * | 2014-12-31 | 2020-12-29 | 青岛众海汇智能源科技有限责任公司 | Channel seizing method of electric energy wireless transmission system and power supply equipment |
| CN106034359A (en) * | 2015-03-16 | 2016-10-19 | 北京信威通信技术股份有限公司 | Speaking right preemption method of cluster service in ad-hoc network |
| CN106470401B (en) * | 2015-08-19 | 2019-08-23 | 北京信威通信技术股份有限公司 | A kind of right of speech method for pre-emptively in self-organization network |
| CN105357651A (en) * | 2015-12-04 | 2016-02-24 | 海能达通信股份有限公司 | Discourse right processing method, apparatus, dispatcher station and terminal in cluster conversation |
| WO2017157009A1 (en) * | 2016-03-15 | 2017-09-21 | 中兴通讯股份有限公司 | Cluster network-wide call control method and device |
| CN108650641B (en) * | 2018-04-16 | 2021-04-16 | 福建科立讯通信有限公司 | Speaking right seizing and arbitration method for centerless DMR transfer platform IP interconnection system |
| CN111447567B (en) * | 2020-03-25 | 2022-04-29 | 浙江大华技术股份有限公司 | Data broadcasting method and device, storage medium and electronic device |
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| CN1968455A (en) * | 2005-11-15 | 2007-05-23 | 中兴通讯股份有限公司 | Method for controlling session right of common multimedia terminal in trunked call |
| CN101005651A (en) * | 2007-01-31 | 2007-07-25 | 华为技术有限公司 | Method and system for granting terminal speak right, and press and talk server |
| CN102036166A (en) * | 2009-09-25 | 2011-04-27 | 普天信息技术研究院有限公司 | Talk right management method in digital trunking communication system |
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| KR100690752B1 (en) * | 2004-07-28 | 2007-03-09 | 엘지전자 주식회사 | Method for allocating talk burst of push-to-talk service system |
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| CN1968455A (en) * | 2005-11-15 | 2007-05-23 | 中兴通讯股份有限公司 | Method for controlling session right of common multimedia terminal in trunked call |
| CN101005651A (en) * | 2007-01-31 | 2007-07-25 | 华为技术有限公司 | Method and system for granting terminal speak right, and press and talk server |
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Address after: 210038 Jiangsu city of Nanjing Province Economic and Technological Development Zone Xing Chi road Xingzhi Science Park building C room 1311 Applicant after: Hou Rongtao Address before: 116033 4-4-1, H1 District, Ganjingzi District, Liaoning, Dalian, 26 Applicant before: Hou Rongtao |
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Effective date of registration: 20170411 Address after: 210046 Jiangsu Nanjing economic and Technological Development Zone, Xing Zhi Lu Xingzhi Science Park building C room 1311 Patentee after: Nanjing Vico Communication Co.,Ltd. Address before: 210038 Jiangsu city of Nanjing Province Economic and Technological Development Zone Xing Chi road Xingzhi Science Park building C room 1311 Patentee before: Hou Rongtao |
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Denomination of invention: PTT collision avoidance method for decentralized command and dispatch communication system Granted publication date: 20170419 Pledgee: Nanjing Zidong sub branch of Bank of Nanjing Co.,Ltd. Pledgor: Nanjing Vico Communication Co.,Ltd. Registration number: Y2024980006134 |
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