CN100409701C - Method for controlling wireless one-key mode speak-right in packet system - Google Patents
Method for controlling wireless one-key mode speak-right in packet system Download PDFInfo
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- CN100409701C CN100409701C CNB2005100828925A CN200510082892A CN100409701C CN 100409701 C CN100409701 C CN 100409701C CN B2005100828925 A CNB2005100828925 A CN B2005100828925A CN 200510082892 A CN200510082892 A CN 200510082892A CN 100409701 C CN100409701 C CN 100409701C
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Abstract
The method completes the switch of talking right between the call users by using the push-to-talk over cellular (POC) server and comprises: after group call is established, building a RTP port supporting the real time transmission protocol for carrying the audio stream or other media stream; starting communication between group members; when the talking right of group members needs to change, the controlled user sends a POC talking-right control request message to the call signaling bearing port; after receiving the POC talking-right control request message, the POC server sends the POC talking-right control instruction to the calling users through the call signaling bearing port, and meantime returns a POC talking-right control response message to said controlled user.
Description
Technical field
The present invention relates to the mobile cluster communication technical field, be specifically related to a kind of method of controlling cluster system wireless PTT mode speaking right.
Background technology
The Digital Clustering technology is widely used in command scheduling departments such as public security, traffic, People's Armed Police, the administration of justice, fire-fighting, civil aviaton, electric power at present.Usually adopting POC (Push-To-Talk over Cellular, Push to talk over Cellular) or PTT (push-to-talk, PoC) mode to converse, is a kind of half-duplex communication mode.
The POC technology is based on the voice mode of GPRS (GPRS) network and IP (Internet Protocol) service, and the user only needs to push the button and just can realize immediate communication.This business especially is fit to needs and same group or the individual user who frequently is interrupted conversation, can realize the communication of " one to one " or " one-to-many ".
In third generation trunked communication system, speaking right is controlled according to the transmission information of user terminal by POC server.Its message flow is as shown in Figure 1:
After trunked call is set up, set up the interface channel of user terminal UE1 to POC server, POC server to user terminal UE2, these connections are based upon on the IP aspect, realize calling out the control of carrying out middle speaking right by RTCP (RTCP Real-time Transport Control Protocol) then, by RTP (RTP) transporting speech or other Media Streams.
The POC agreement is defined in after the professional bottom carrying of the POC foundation, finishes by Session Initiation Protocol and calls out control, finishes the control of speaking right in the conversation by rtcp protocol.These two kinds of controls all respectively take a communication port.
1.POC professional bottom carrying is set up;
2. set up by SIP (SIP) agreement and call out, promptly set up and call out by SIP INVITE (setup requests) message and SIP 200OK message;
3. set up RTP media delivery port by socket communication programming application, be used for transporting speech or other Media Streams;
4. set up the RTCP port by socket communication programming application, be used for the transmission of speaking right control information;
5. user terminal UE1 sends the right to apply for words message by terminal, i.e. the floorrequest message of rtcp protocol;
6.POC server finds to give user UE1 to authorize speaking right by checking, then sends right of speech grant information, i.e. the floor grant message of rtcp protocol to UE1; Send instruction of right to speech simultaneously, promptly the floor taken message of rtcp protocol is given the user terminal UE2 that receives conversation.
Like this, can make UE2 listen to the speech of UE1.
Utilize the existing protocol regulation, there is following shortcoming in speaking right control in being undertaken by rtcp protocol realization calling:
(1) because rtcp protocol need take a transmit port separately, and the same with Real-time Transport Protocol, the speaking right control information is compared with Media Stream, information flow-rate seldom concerning system, has reduced usage factor of system resource;
(2) though Real-time Transport Protocol can flow individualism by carrying media, rtcp protocol can only occur in pairs with Real-time Transport Protocol, in the relatively-stationary system of flow, has wasted the port resource of system;
(3) from system signaling control angle, call out other signalings of control and use Session Initiation Protocol, speaking right control signaling is used rtcp protocol, two kinds of agreements are used different port resources respectively, and system signaling control centre uses two kinds of agreements that same call is controlled, strengthened the complexity that signaling system realizes, must carry out monitoring signaling to two ports simultaneously, the process complexity that makes message flow differentiation and parsing;
(4) rtcp protocol and Real-time Transport Protocol occur in pairs, take two related ports, a command transmitting, a carrying media, be unfavorable for separating of chain of command and loading end, independent separately control and the function of carrying of realizing is unfavorable for that 3G (third generation) mobile cluster system is to all-IP (Internet Protocol) architecture evolution.
Summary of the invention
The purpose of this invention is to provide a kind of method of controlling cluster system wireless PTT mode speaking right, to overcome the shortcoming of utilizing rtcp protocol to finish speaking right control in the conversation in the prior art, realize the signaling control of POC server simply, easily, improve resource utilization ratio, improve the mobile cluster systematic function.
For this reason, the invention provides following technical scheme:
A kind of method of controlling cluster system wireless PTT mode speaking right is finished the change of controlling speaking right between user and the calling user by the control of Push to talk over Cellular POC server, and described method comprises step:
After A, trunked call are set up, set up the realtime transmission protocol RTP port of voice-over or other media flow transmission, communicate by letter between the beginning cluster user;
B, when cluster user speaking right control needs to change or service needed when changing, send POC by the control user by call signaling carrying port and call out speaking right control request message, the notice POC server;
After C, POC server receive that described POC calls out speaking right control request message, send POC by call signaling carrying port and call out speaking right control Indication message, call out speaking right control response message to described control user response POC simultaneously to described calling user.
Described step C further comprises:
C1, POC server are approved described control user after receiving that described POC calls out speaking right control request message;
C2, approval send POC by the back by call signaling carrying port and call out speaking right control Indication message to described calling user, call out speaking right control response message to described control user response POC simultaneously.
Described step C1 further comprises:
Utilize the information of the cluster user of data-base recording conversation;
POC server is inquired about described database according to user identity and message identification that described POC calls out in the speaking right control request message, and described control user is approved.
Described step B is specially:
Described control user sends SIP call bearer medium update request SIP UPDATE message to POC server.
Described step C2 is specially:
POC server sends SIP announcement SIP NOTIFY to described calling user, sends the SIP 200OK message of the described domestic consumer of expression success response to described control user.
Before described steps A, also comprise step:
The control user initiates the POC service call, sets up the professional bottom carrying of POC with POC server and is connected;
Setting up calling by described call signaling carrying port and initial session protocol sip message connects.
Described call signaling carrying port is the User Datagram Protoco (UDP) port.
By above technical scheme provided by the invention as can be seen, the present invention is when realizing the control of wireless one-key mode speak-right in packet system, do not need to rebulid the RTCP port and transmit the speaking right control information, and directly use call signaling to carry port, the User Datagram Protoco (UDP) udp port that is call transmission control signaling is realized the control of speaking right and the transmission of professional change control signaling, thereby reduced the RTCP control port, saved the group system port resource.
Based on the similar characteristics of message parameter in the message that realizes speaking right control in message parameter function and the rtcp protocol in these two kinds of message of UPDATA and NOTIFY in the Session Initiation Protocol group of messages, directly adopt these two kinds of message to realize that simply, easily the signaling control of POC server realizes the control of speaking right.All signaling flows only transmit at the User Datagram Protoco (UDP) udp port, speech or other Media Streams are all in RTP transmission bearer port transmission, these two ports do not have relevance, help separating of chain of command and loading end, be easy to interconnecting of realization and NGN (next generation network) system entity, smoothly expanding system is to the all-IP architecture evolution.
Description of drawings
Fig. 1 is the message flow of POC server control user terminal speaking right in the prior art;
Fig. 2 is the realization flow figure of the inventive method;
Fig. 3 utilizes the present invention to carry out the message flow of conversing between cluster user.
Embodiment
Core of the present invention is when realizing the control of wireless one-key mode speak-right in packet system, directly uses call signaling carrying port, i.e. the udp port of call transmission control signaling is realized the control and the professional transmission that changes the control signaling of speaking right.At first, finish calling control, after trunked call is set up, set up the realtime transmission protocol RTP port of voice-over or other media flow transmission, communicate by letter between the beginning cluster user by Session Initiation Protocol; When the control of cluster user speaking right needs to change, directly carry out the mutual of speaking right control signaling by the control user by described udp port and POC server, realize speaking right control, professional transmission of control signaling and the analyzing and processing of changing in the IP aspect.
In order to make those skilled in the art person understand the present invention program better, the present invention is described in further detail below in conjunction with drawings and embodiments.
With reference to Fig. 2, Fig. 2 shows the realization flow of the inventive method, may further comprise the steps:
Step 201: the control user initiates the POC service call, sets up the professional bottom carrying of POC with POC server and is connected.
Step 202: set up calling by call signaling carrying port and Session Initiation Protocol message and connect.
Identical with calling establishment of connection process in the prior art, the control user is carried port by call signaling, be that udp port sends the SIP INVITE to POC server, after POC server was received this message, the user who sets up conversation to needs sent the SIP INVITE, after calling user is received the SIP INVITE, respond SIP 200OK message to POC server, POC server like this, has promptly been finished call control procedure by Session Initiation Protocol to control user response SIP 200OK message.
Step 203: after trunked call is set up, set up the realtime transmission protocol RTP port of voice-over or other media flow transmission, communicate by letter between the beginning cluster user.
Equally, this process is identical with the process of RTP media delivery port in the prior art, promptly sets up the RTP port by Real-time Transport Protocol, is used for transporting speech or other Media Streams.
RTP is a kind of host-host protocol that is used on the internet at multimedia data stream.RTP be defined in one to one or the transmission situation of one-to-many under work, its objective is provides temporal information and realizes that stream is synchronously.It uses UDP to transmit data usually, also can work on other agreements such as TCP.
Step 204: when the control of cluster user speaking right needs change or service needed to change, send POC calling speaking right control request message, notice POC server by call signaling carrying port by the control user.
After step 205:POC server receives that POC calls out speaking right control request message, send POC by call signaling carrying port and call out speaking right control Indication message, call out speaking right control response message to described control user response POC simultaneously to described calling user.
In order to guarantee the correctness of speaking right control, can approve the cluster user of request conversation by POC server, just send corresponding message notice calling user after approval is passed through and reply response message to the control user.
For example, utilize the information of the cluster user of data-base recording conversation, comprise user's identity information and state information, after POC server receives that POC calls out speaking right control request message, inquire about this database according to user identity in this message and message identification.
And if POC server state permission consistent with the information that writes down in the database, then approval control user's request, change POC server and user's connection status (or pattern), enter new connection status, otherwise, send failure response message to the control user, POC server keeps original and user's connection status constant.
The system's total resources and the single information such as state of resources such as allowing resource and customer call state that are connected that are connected with the user have been write down in the POC server, in case the change that will be correlated with, then need permission by POC server resource and condition managing function, otherwise, can not change resource and state.
Approval sends POC by the back by call signaling carrying port and calls out speaking right control Indication message to described calling user, calls out speaking right control response message to control user response POC simultaneously.
As seen, the present invention is when realizing the control of wireless one-key mode speak-right in packet system, do not need to rebulid the RTCP port and transmit the speaking right control information, and directly use call signaling carrying port, the i.e. udp port of call transmission control signaling to realize the control and the professional transmission that changes the control signaling of speaking right.
The control of speaking right is directly finished at the IP layer in the conversation, the control signaling message that uses: POC calling speaking right control request message, POC call out speaking right control Indication message, POC calls out speaking right control response message and can adopt proprietary message, also can utilize existing Session Initiation Protocol message.
Session Initiation Protocol is that IETF works out, and is used for multimedia communication in many ways.Definition according to IETFRFC2543, SIP is a text based application layer control protocol, be independent of bottom host-host protocol TCP/UDP/SCTP (transmission control protocol/User Datagram Protoco (UDP)/stream control transfer protocol), be used to set up, revise and stop both sides or Multimedia session in many ways on the IP network.Session Initiation Protocol has been used for reference HTTP (HTML (Hypertext Markup Language)), SMTP agreements such as (Simple Mail Transfer protocols), supports the agency, is redirected and registers functions such as consumer positioning, supports that the user moves.By cooperating SIP support voice, video, data, E-mail, state, chat, recreation etc. with RTP/RTCP, SDP (Session Description Protocol), RTSP agreements such as (real-time stream media protocols) and DNS (domain name system).Session Initiation Protocol can transmit on TCP or UDP, because SIP itself has handshake mechanism, and can first-selected UDP.
Existing Session Initiation Protocol regulation, when end-user service in calling because of using other professional when changing IP aspect QoS (service quality), need to initiate SIP UPDATA message, the change of notice POC server control qos parameter, when POC server is approved, initiate the SIP NOTIFY and notify other users that connect the qos parameter information that system changes, if other users meet the pattern of new business then receive information, POC server sends successful response message to the terminal use who makes a call simultaneously.
In view of the similarity of message parameter in the message that realizes speaking right control in message parameter function and the rtcp protocol in UPDATA message in the Session Initiation Protocol group of messages and the NOTIFY, the present invention can adopt these two message to realize speaking right control in the IP aspect.
Utilize the parameters C ontact in the message header in the SIP UPDATE message, in existing protocol, this parameter indicates and connects kind and type.In the present invention, it is expanded to change type and change reason, the change type comprises professional change or speaking right change.Like this, when business change or speaking right change, can utilize SIP UPDATE message to realize speaking right control and professional change in the IP aspect.
Be example to adopt Session Initiation Protocol message below, describe the message flow that cluster user is set up conversation in detail.
With reference to Fig. 3, cluster user UE1 is the control user, and cluster user UE2 is a calling user, and UE1 is to the UE2 connection that makes a call.
31. calling subscriber UE1 initiates the POC service call, sets up the professional bottom carrying of POC.
32. call out by the foundation of SIP (session initiation protocol) agreement, promptly set up and call out connection by SIP INVITE and SIP 200OK message:
System is after having set up the bottom carrying, and UE1 initiates the calling of IP aspect, at first sends the SIP INVITE to POC server, requires to set up to call out to connect.POC server connects calling subscriber UE1 to called subscriber UE2 after the authentication approval, calling subscriber UE1 is given in called subscriber UE2 loopback CONNect Acknowledgement, promptly to calling subscriber's loopback SIP 200OK message.So far, customer call connects foundation.
33. customer call is set up the RTP port after setting up, such as, can set up RTP media delivery port by socket communication programming, be used for transporting speech or other Media Streams, begin communication between the user.
34. when the control break of user's speaking right, calling subscriber UE1 initiates SIP UPDATA message, notice POC server speaking right needs to change.
35.POC server to this customer acceptance after, be notified to called subscriber UE2 by the SIP NOTIFY, the response of initiating user's success for simultaneously calling subscriber UE1, i.e. SIP 200OK message.
36. when call business changes, set up a RTP port again, the newly-increased Media Stream of transmission.
37.UE2 apply to become the control user, initiate SIP UPDATA message, notice POC server speaking right needs to change.
38.POC server to this customer acceptance after, be notified to communication user UE1 by the SIP NOTIFY, initiate the response of user's success, i.e. SIP 200OK message for simultaneously new control user UE2.
Like this, can set up the conversation between UE2 and the UE1, and realize the control of speaking right.
Certainly, in digital cluster system, the communication mode of one-to-many such as can realize group calling, group busy, its realization flow is similar to the above, is not described in detail at this.
Call flow from said system realizes behind the access success, no longer needs to set up the RTCP control port, need not carry out RTCP resolving, makes that the key-course protocol stack is more simple and clear; Do not had the signaling of RTCP control port to transmit, can not exist and signaling control problem, need not design complicated synchronous and mutual exclusion process, reduced the complexity that signalling analysis is realized effectively, made signaling control realize simple and reliable.
Utilize the inventive method, signaling is controlled on the transmission link to be transmitted, all signaling procedures adopt with a kind of agreement, analyze and handle by a signaling control flow, do not exist multi-protocols to handle and concurrent signalling analysis, control analysis realizes simple, can expect that the signaling control point is simple, makes system have stronger robustness.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, wish that appended claim comprises these distortion and variation and do not break away from spirit of the present invention.
Claims (7)
1. a method of controlling cluster system wireless PTT mode speaking right is finished the change of controlling speaking right between user and the calling user by the control of Push to talk over Cellular POC server, it is characterized in that described method comprises step:
After A, trunked call are set up, set up the realtime transmission protocol RTP port of voice-over or other media flow transmission, communicate by letter between the beginning cluster user;
B, when cluster user speaking right control needs to change or service needed when changing, send POC by the control user by call signaling carrying port and call out speaking right control request message, the notice POC server;
After C, POC server receive that described POC calls out speaking right control request message, send POC by call signaling carrying port and call out speaking right control Indication message, call out speaking right control response message to described control user response POC simultaneously to described calling user.
2. method according to claim 1 is characterized in that, described step C further comprises:
C1, POC server are approved described control user after receiving that described POC calls out speaking right control request message;
C2, approval send POC by the back by call signaling carrying port and call out speaking right control Indication message to described calling user, call out speaking right control response message to described control user response POC simultaneously.
3. method according to claim 2 is characterized in that, described step C1 further comprises:
Utilize the information of the cluster user of data-base recording conversation;
POC server is inquired about described database according to user identity and message identification that described POC calls out in the speaking right control request message, and described control user is approved.
4. method according to claim 1 is characterized in that, described step B is specially:
Described control user sends SIP call bearer medium update request SIP UPDATE message to POC server.
5. method according to claim 2 is characterized in that, described step C2 is specially:
POC server sends SIP announcement SIP NOTIFY to described calling user, sends the SIP 200 OK message of the described calling user success response of expression to described control user.
6. method according to claim 1 is characterized in that, also comprises step before described steps A:
The control user initiates the POC service call, sets up the professional bottom carrying of POC with POC server and is connected;
Setting up calling by described call signaling carrying port and SIP sip message connects.
7. method according to claim 1 is characterized in that, described call signaling carrying port is the User Datagram Protoco (UDP) port.
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| CNB2005100828925A CN100409701C (en) | 2005-07-11 | 2005-07-11 | Method for controlling wireless one-key mode speak-right in packet system |
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| CNB2005100828925A CN100409701C (en) | 2005-07-11 | 2005-07-11 | Method for controlling wireless one-key mode speak-right in packet system |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100493220C (en) | 2007-02-27 | 2009-05-27 | 华为技术有限公司 | Release method and device for speaking right |
| WO2008148328A1 (en) * | 2007-06-06 | 2008-12-11 | Huawei Technologies Co., Ltd. | Media system of poc, device and mthod as the same |
| EP2211522A4 (en) * | 2007-12-06 | 2012-04-18 | Huawei Tech Co Ltd | Media stream control method, system and logic entity |
| CN102394877A (en) * | 2011-09-13 | 2012-03-28 | 华为技术有限公司 | Method, server and system for establishing PTT (post, telegraphs and telephones) cluster call |
| CN102348168A (en) * | 2011-10-14 | 2012-02-08 | 华为终端有限公司 | Group calling method, terminal and application server |
| WO2016106593A1 (en) | 2014-12-30 | 2016-07-07 | 华为技术有限公司 | Method and device for transmission-priority control |
| US10051440B2 (en) * | 2015-09-22 | 2018-08-14 | Telefonaktiebolaget Lm Ericsson (Publ) | MBMS bearer handling in a group communications system |
| CN109413593A (en) * | 2017-08-17 | 2019-03-01 | 成都鼎桥通信技术有限公司 | Cluster voice intercommunication interconnection method between a kind of system |
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| US20030153343A1 (en) * | 2002-02-14 | 2003-08-14 | Crockett Douglas M. | Communication device for initiating a group call in a group communication network |
| US20040224710A1 (en) * | 2003-05-07 | 2004-11-11 | Petri Koskelainen | System and method for providing support services in push to talk communication platforms |
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| US20030153343A1 (en) * | 2002-02-14 | 2003-08-14 | Crockett Douglas M. | Communication device for initiating a group call in a group communication network |
| US20040224710A1 (en) * | 2003-05-07 | 2004-11-11 | Petri Koskelainen | System and method for providing support services in push to talk communication platforms |
| CN1585527A (en) * | 2004-06-12 | 2005-02-23 | 中兴通讯股份有限公司 | Rapid building method for calling in mobile telecommunicating system |
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