CN103079173A - 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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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 the system broadcasts or multicasts a PTT request to a whole network; the system 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 system; 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 avoidance method, in particular to a kind of for IP-based PTT collision avoidance method without the center command dispatching and communication system.
Background technology
In command dispatching system, PTT is a kind of half-duplex traffic, and the user who namely only presses the PTT key could talk, and other user can only answer, therefore must unify control to the right of speech preemption function of PTT, the assurance system can only have a people to be authorized to carry out the PTT PTT push to talk at any time.
In traditional command dispatching system, the arbitration function of PTT right of speech is to be finished by the some centers network element in the network, for example the arbitration of digital group system PTT business may be finished by MSC, the arbitration of IMS system PoC service is finished by PoC Server, be to certainly exist a Centroid in the network, by the arbitration management of this central point unification to the PTT speaking right.When a plurality of users press PTT key application speech simultaneously, a plurality of users' PTT request is sent to this arbitration Centroid, by the sequencing of this Centroid according to PTT request, and user's priority comprehensively adjudicates, thereby determines to authorize which user with the speaking right of PTT.
This shows, PTT right of speech arbitration in the legacy system is finished by some Centroids, but for without centring system, in the network without any Centroid, can't carry out unified arbitration management, can't be as legacy system, the PTT that converges all users asks Centroid, and then by the Centroid unitary arbitration, therefore must seek a kind of PTT right of speech referee method that is applicable to without the center command dispatching system.
Summary of the invention
The object of the invention is to overcome the above problem that prior art exists, provide a kind of for the PTT collision avoidance method without the center command dispatching and communication system.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention is achieved through the following technical solutions:
A kind of for the PTT collision avoidance method without the center command dispatching and communication system, may further comprise the steps:
Step 1) party A-subscriber presses the PTT key, and request PTT speech starts timer Tr, and system is to the whole network broadcasting or multicast PTT request;
Step 2) system can postpone to wait for certain wait interval T w, whether there is other users' PTT request to arrive in monitoring during this period of time, if wait for that the PTT request without any other users arrives in the interval T w, then A connects Traffic Channel, indicating user can be talked, if wait for the PTT request that receives the party B-subscriber in the interval T w, enter next step;
Step 3) if wait for the PTT request that receives the party B-subscriber in the interval T w, then judges, if party B-subscriber's priority is higher than the party A-subscriber, then the party A-subscriber stops PTT wait flow process, directly transfer the state of answering to, prepare to receive party B-subscriber's voice packet, otherwise enter next step;
Step 4) if party B-subscriber's priority is lower than the party A-subscriber, then party B-subscriber's PTT request is disregarded, directly abandon, otherwise then equal the party A-subscriber for party B-subscriber's priority, then A makes a concession a period of time Ta at random at 0-Td in the time period, again initiates the PTT request, returns step 2.
Further, the described timer Tr of step 1 is from the PTT button, if Tr in the time user never obtain the PTT speaking right, illustrate that then PTT has occured seizes conflict, this moment, system no longer carried out any PTT request transmission, and prompting user discharges the PTT button.
Further, the described wait interval T of step 2 w is according to the transmission delay of network, and this time should greater than the time-delay of the one-way transmission between any 2 in the network, namely guarantee at Tw in the time period, any clean culture, multicast, broadcast, the destination node in the network can both receive.
Further, the described time T d of step 4 avoids the again conflict of PTT button greater than waiting for interval T w.
Further, described timer Tr 1-2 second regularly.
The invention has the beneficial effects as follows:
The present invention proposes a kind of PTT referee method that is applied to without the center command dispatching and communication system, pass through the method, needn't there be PTT arbitration Centroid in the network, all terminal uses can send the PTT request in the system, the whole network is avoided the PTT collision based on certain rule, and authorizes a certain user to carry out the PTT speech.Realized also simultaneously that multipriority is professional.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, below with preferred embodiment of the present invention and cooperate accompanying drawing to be described in detail as follows.The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 PTT collision avoidance of the present invention method flow schematic diagram.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
With reference to shown in Figure 1, a kind of for the PTT collision avoidance method without the center command dispatching and communication system, may further comprise the steps:
Step 1) party A-subscriber presses the PTT key, and request PTT speech starts timer Tr, and system is to the whole network broadcasting or multicast PTT request;
Step 2) system can postpone to wait for certain wait interval T w, whether there is other users' PTT request to arrive in monitoring during this period of time, if wait for that the PTT request without any other users arrives in the interval T w, then A connects Traffic Channel, indicating user can be talked, if wait for the PTT request that receives the party B-subscriber in the interval T w, enter next step;
Step 3) if wait for the PTT request that receives the party B-subscriber in the interval T w, then judges, if party B-subscriber's priority is higher than the party A-subscriber, then the party A-subscriber stops PTT wait flow process, directly transfer the state of answering to, prepare to receive party B-subscriber's voice packet, otherwise enter next step;
Step 4) if party B-subscriber's priority is lower than the party A-subscriber, then party B-subscriber's PTT request is disregarded, directly abandon, otherwise then equal the party A-subscriber for party B-subscriber's priority, then A makes a concession a period of time Ta at random at 0-Td in the time period, again initiates the PTT request, returns step 2.
Further, the described timer Tr of step 1 is from the PTT button, if Tr in the time user never obtain the PTT speaking right, illustrate that then PTT has occured seizes conflict, this moment, system no longer carried out any PTT request transmission, and prompting user discharges the PTT button.
Further, the described wait interval T of step 2 w is according to the transmission delay of network, and this time should greater than the time-delay of the one-way transmission between any 2 in the network, namely guarantee at Tw in the time period, any clean culture, multicast, broadcast, the destination node in the network can both receive.
Further, the described time T d of step 4 avoids the again conflict of PTT button greater than waiting for interval T w.
Further, described timer Tr 1-2 second regularly.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a PTT collision avoidance method that is used for without the center command dispatching and communication system is characterized in that, may further comprise the steps:
Step 1) party A-subscriber presses the PTT key, and request PTT speech starts timer Tr, and system is to the whole network broadcasting or multicast PTT request;
Step 2) system can postpone to wait for certain wait interval T w, whether there is other users' PTT request to arrive in monitoring during this period of time, if wait for that the PTT request without any other users arrives in the interval T w, then A connects Traffic Channel, indicating user can be talked, if wait for the PTT request that receives the party B-subscriber in the interval T w, enter next step;
Step 3) if wait for the PTT request that receives the party B-subscriber in the interval T w, then judges, if party B-subscriber's priority is higher than the party A-subscriber, then the party A-subscriber stops PTT wait flow process, directly transfer the state of answering to, prepare to receive party B-subscriber's voice packet, otherwise enter next step;
Step 4) if party B-subscriber's priority is lower than the party A-subscriber, then party B-subscriber's PTT request is disregarded, directly abandon, otherwise then equal the party A-subscriber for party B-subscriber's priority, then A makes a concession a period of time Ta at random at 0-Td in the time period, again initiates the PTT request, returns step 2.
2. according to claim 1 for the PTT collision avoidance method without the center command dispatching and communication system, it is characterized in that: the described timer Tr of step 1, from the PTT button, if Tr in the time user never obtain the PTT speaking right, illustrate that then PTT has occured seizes conflict, this moment, system no longer carried out any PTT request transmission, and prompting user discharges the PTT button.
3. according to claim 1 for the PTT collision avoidance method without the center command dispatching and communication system, it is characterized in that: the described wait interval T of step 2 w is according to the transmission delay of network, this time should be greater than the time-delay of the one-way transmission between any 2 in the network, namely guarantee at Tw in the time period, any clean culture, multicast, broadcast, the destination node in the network can both receive.
4. according to claim 1 or 3 described for the PTT collision avoidance method without the center command dispatching and communication system, it is characterized in that: the described time T d of step 4 avoids the again conflict of PTT button greater than waiting for interval T w.
5. according to claim 2 for the PTT collision avoidance method without the center command dispatching and communication system, it is characterized in that: described timer Tr is 1-2 second regularly.
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| WO2016062040A1 (en) * | 2014-10-20 | 2016-04-28 | 中兴通讯股份有限公司 | Ptt call speaking right request method, device and cluster core network |
| CN105811593A (en) * | 2014-12-31 | 2016-07-27 | 青岛众海汇智能源科技有限责任公司 | Channel preemption method for 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 |
| CN106470401A (en) * | 2015-08-19 | 2017-03-01 | 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 |
| 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 |
| CN108650641A (en) * | 2018-04-16 | 2018-10-12 | 福建科立讯通信有限公司 | A kind of method that non-stop layer DMR intermediate stations IP interacted system rights of speech are seized and arbitrated |
| CN111447567A (en) * | 2020-03-25 | 2020-07-24 | 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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| CN111447567A (en) * | 2020-03-25 | 2020-07-24 | 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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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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