CN1838790A - PTT service realizing system and method based on VoIP technique - Google Patents
PTT service realizing system and method based on VoIP technique Download PDFInfo
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- CN1838790A CN1838790A CN 200510055668 CN200510055668A CN1838790A CN 1838790 A CN1838790 A CN 1838790A CN 200510055668 CN200510055668 CN 200510055668 CN 200510055668 A CN200510055668 A CN 200510055668A CN 1838790 A CN1838790 A CN 1838790A
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Abstract
The invention relates to a one-key service system based on VoIP technique and relative method, which comprises: a one-key client terminal, a user online server, and a broad band gateway. First, the client terminal registers the user online server; when the calling terminal sends calling request to the online server, the online server judges the network character of calling user to transmit the calling instruction to the called terminal and build media channel between users to communicate the media package; to public network user, the online server sends calling instruction, and builds media channel between users; to private network user, the online server transmits the calling instruction and processes instruction consultation with broad band gateway, and the broad band gateway builds the media channel. The invention can select different media treatments according to the user characters, on different PTT users, to improve the efficiency of PTT calling and reduce the load of system.
Description
Technical field
The present invention relates to the instant messaging field, be specifically related to a kind of PTT business realizing system and method based on voip technology.
Background technology
In the current information age, people always wish once conversing immediately by some keys, and 11 figure places are dialled by elder generation unlike public's mobile phone, also to wait several ms or longer time to converse, conversing also do not know when can converse if meet the other side, no matter how anxious you have thing only patient etc., and PTT (Push To T calling terminal lk), i.e. " PTT " business, can set up conversation fast, the communication traffic of " one to one " or " one-to-many " half-duplex call of similar group system is provided for the cellphone subscriber.
PTT comes from the cdma network of North America the earliest, has just attracted numerous users in a short period of time based on the PTT business of CDMA 1x.Each big operator and manufacturer followed up in succession afterwards, released all kinds of relevant PTT business.At present, this technology being applied among GSM and the cdma network by success.
In the public mobile network, no matter be GSM or CDMA, its PTT adopts digital voip technology, it designs according to Session Initiation Protocol and IP multimedia subsystem, IMS (IMS), this technology is based on packet data network, storage exchange principle, and the circuit that is different from the cluster specialty net directly transmits exchange.
The continuous development of broadband network technology and the widespread usage of broadband network are for providing possibility based on " PTT " of voip technology professional realization and scale use.Yet well-known, the scarcity of IP address has caused the complexity of network topology structure, thereby, in existing PTT implementation, all need to solve the calling of the PTT between user problem in the LAN based on voip technology.
In order to solve the network crossing problem of private user, generally, all need to increase a system equipment based on the PTT system of voip technology and control and handle the medium bag.Yet, how to improve the efficient that PTT calls out effectively, reduce the load of system equipment, the PTT system that is based on voip technology needs one of problem of emphasis solution.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of PTT service implementation method based on voip technology, in the PTT calling that realizes between the LAN user, improve the efficient that PTT calls out, shorten call set-up time, the load of mitigation system equipment, the real-time of raising media delivery.
The invention provides a kind of PTT business realizing system, comprise the PTT client, be used to initiate/accept the PTT call request, and carry out the encoding and decoding of Media Stream, also comprise based on voip technology:
User's line server is used to accept the registration of described client, the connection attribute of record client, and transmit the PTT call request in view of the above, in the PTT of having only the public network client to participate in is called out, assist directly to set up between the described client media channel, switched-media bag;
Broadband gateway equipment, link to each other with described user's line server by internal interface, the PTT that is used for participating in the private network client with network address translation apparatus is called out, carrying out signaling with described line server consults, and be that described client is set up media channel as intermediary, the switched-media bag.
The present invention and then a kind of PTT service implementation method based on voip technology is provided comprises the steps:
(1) the PTT client is registered to user's line server;
(2) PTT caller originating end sends call request to described line server;
(3) described line server belongs to public network user according to user's network attribute in this call request judgement call group still private user;
(4) described line server to called end forwarded call signaling, is set up media channel according to network attribute between assisting users, the switched-media bag,
Wherein, for the calling of having only public network user to participate in,, directly set up media channel between the user, the switched-media bag by described line server forwarded call signaling;
For the calling that the private user with network address translation function participates in, by described line server forwarded call signaling, and carry out signaling with broadband gateway and consult, set up media channel via broadband gateway, the switched-media bag.
The present invention is in the existing network architecture, realized a kind of PTT business based on voip technology, can distinguish different PTT users adaptively, take different medium processing schemes according to user property, greatly improved the efficient that PTT calls out, further shorten call set-up time, but also alleviated the load of system equipment effectively, improved the real-time of media delivery.
Description of drawings
Fig. 1 uses system group network structural representation of the present invention;
Fig. 2 is an implementation method flow chart of the present invention;
Fig. 3 is the PTT interface of calls and the process description of public network user among the present invention " one to one ";
Fig. 4 is that private user participates in " one to one " PTT interface of calls and process description among the present invention;
Fig. 5 is that private user participates in " one-to-many " PTT interface of calls and process description among the present invention.
Embodiment
The invention provides a kind of " PTT " business realizing system and method based on voip technology, employed equipment mainly comprises: PTT client, user's line server PS and broadband gateway equipment B GW.The PTT call request can be initiated or accept to the PTT client; User's line server is responsible for the processing of PTT call request, and simultaneously, in the PTT that has private user to participate in called out, user's line server also was responsible for sending the PTT call information to broadband gateway equipment, transmits criterion so that broadband gateway is determined medium; The PTT that broadband gateway equipment does not participate between the public network user calls out, and it plays a significant role in the PTT calling procedure that has private user to participate in, and the forwarding of medium bag will be finished by broadband gateway equipment.The present invention adopts the architecture configuration system of Client-Server (client-server), carry out communication with SIP (Session Initiation Protocol) agreement between PTT client and the line server, use internal interface between line server and the broadband gateway equipment.The request of client or response are transmitted among being packaged into the MESSAGE source language of sip message.
The PTT calling both sides is all described the medium of oneself according to Session Description Protocol (SDP, Session Description Protocol), then this SDP is encapsulated among the SIP-MESSAGE and sends to line server, transmits this message by line server.Calling both sides receives after the other side's the message, and extraction the other side's SDP describes and decodes, and further finishes the negotiation of medium and the foundation of media channel.For two public network users, both sides directly describe by line server exchange SDP separately, so that set up the media channel that PTT calls out; And for the private user with network address translation function, the PTT call signaling is transmitted by line server equally, but, line server and broadband gateway also must be set up the signaling of media channel and consult, set up media channel by broadband gateway, formulate the medium forwarding mechanism, realize bipartite medium packet switch.
The present invention can distinguish different PTT users adaptively, takes different medium processing schemes according to user property.The PTT client need be spoken the connection attribute of oneself and send to line server when line server is registered by the MESSAGE source of Session Initiation Protocol.Connection attribute mainly comprises: the IP address of client place computer and the port numbers of connection.Line server is registered employed address and port numbers according to this information and PTT client to line server, can judge the network attribute of this client.When carrying out the PTT calling, whether the user that can judge in this PTT call group is public network user or whether is positioned at same local area network (LAN).
PTT calls out and not only comprises audio stream among the present invention, also comprises video flowing simultaneously.The encoding and decoding of Voice ﹠ Video are all brought in PTT client and are finished.Wherein, the Audio Processing support is standard G.711, G.729 and G.723, and coding and decoding video adopts H.263 standard.
" public network user " described in the present invention both referred to the public network user on the internet, also comprised to be positioned at same local area network users; " private user " is meant not in same local area network users.
As shown in Figure 1, for using system group network structural representation of the present invention.Native system is by the PTT client, and user's line server and broadband gateway are formed, and wherein, the private network client has network address translation (nat) equipment.Can adopt Session Initiation Protocol to carry out the mutual of signaling between PTT client and the line server; After the PTT call setup gets up, between the client and the media delivery between client and the broadband gateway can adopt the RTP/RTCP agreement; Can adopt inner self-defining interface between line server and the broadband gateway.The PTT call request can be initiated or accept to the PTT client, and it also is responsible for the encoding and decoding of audio and video medium stream simultaneously; User's line server is responsible for the registration and the registration of PTT client, writes down the connection attribute of PTT client simultaneously, and finishes the forwarding of PTT call request; Broadband gateway equipment is used for the PTT calling that private user participates in, and finishes the control and the distribution of medium bag by it.PTT between the public network user calls out with broadband gateway irrelevant.
As shown in Figure 2, be implementation method flow chart of the present invention, at first the PTT client is registered (step 201) to user's line server; When PTT caller originating end when described line server sends call request (step 202); Described line server belongs to public network user according to user's network attribute in this call request judgement call group still private user (step 203); Described then line server according to network attribute to called end forwarded call signaling, and set up media channel between assisting users, switched-media bag (step 204), for the calling of having only public network user to participate in, by described line server forwarded call signaling, directly set up media channel between the user, the switched-media bag, calling for private user participation with network address translation function, by described line server forwarded call signaling, and carry out signaling with broadband gateway and consult, set up media channel via broadband gateway, the switched-media bag.
In the present invention and since the PTT between the public network user call out with the PTT call flow that has private user to participate on exist than big-difference, so, must judge and distinguish each client user's network attribute.This work can be finished in the process of line server registration in the PTT client.
The PTT client at first must be to line server registration and registration.Registration and registration adopt Session Initiation Protocol to finish.After succeeding in registration, the PTT client also needs the MESSAGE source language of connection attribute by Session Initiation Protocol of oneself sent to line server.Connection attribute mainly comprises: the IP address of client place computer and the port numbers of connection.Simultaneously, line server can obtain the PTT client to line server the registration address of using and port numbers according to Socket API, and the two relatively can be judged the network attribute of this client, determine that the user is private user or public network user.
As shown in Figure 3, for public network user, PTT customer end A and B are after the line server registration is finished, and A initiates a PTT to B and calls out, and process is as follows:
1, A describes the media information of oneself with SDP, and this SDP is encapsulated among the SIP-MESSAGE message, sends to line server;
2, line server is checked the state of B, if B is in busy state, then directly sends call failure message to A; Otherwise line server is transmitted to B with this PTT call request; Write down owner's (belonging to A) of present speaking right simultaneously;
3, B receives after the PTT call request, opens media channel, prepare to receive the medium bag that comes from A, and decoding is play; Simultaneously, the PTT call is encapsulated among the SIP-MESSAGE message, line server is given in loopback;
4, line server sends to A with the call message of B;
5, A receives after the PTT call of B, begins to gather local media, sends to B after compressed encoding;
6, after the A speech finishes, stop the transmission of medium bag, send message to line server simultaneously and discharge speaking right, line server notice B;
7, A and B send the speaking right application to line server, distribute speaking right by line server according to arriving first " getting principle earlier ", and write down the owner of present speaking right;
8, repeating step 1～7;
9, behind the end of conversation, on-hook side sends on-hook message to line server, notifies the opposing party on-hook by line server.
As shown in Figure 4, " one to one " PTT that has private user to participate in calls out, and PTT customer end A and B are after the line server registration is finished, and A initiates a PTT to B and calls out, and process is as follows:
1, A describes the media information of oneself with SDP, and this SDP is encapsulated among the SIP-MESSAGE message, then NAT (network address translation) equipment of this message by this local area network (LAN) is sent to line server;
2, line server is checked the state of B, if B is in busy state, then sends call failure message to A; Otherwise line server is transmitted to the NAT device of B local area network (LAN) of living in this PTT call request, and sends to B by this NAT device;
3, line server sends the PTT call information to broadband gateway;
4, broadband gateway record PTT call information, and prepare to receive and transmit the medium bag that comes from A;
5, B receives after the PTT call request, opens media channel, prepare to receive the medium bag that comes from A, and decoding is play; Simultaneously, the PTT call is encapsulated among the SIP-MESSAGE message, gives line server by the NAT device loopback;
6, B sends the UDP message to broadband gateway, so that get through broadband gateway is transmitted routing channel from medium to B;
7, line server sends to A with the call message of the B NAT device by A;
8, A receives after the PTT call of B, begins to gather local media, sends to broadband gateway by NAT device after compressed encoding;
9, broadband gateway is transmitted the medium bag of A to B;
10, after the A speech finishes, stop the transmission of medium bag, send message to line server simultaneously and discharge speaking right, line server notice B;
11, A and B send the speaking right application to line server, distribute speaking right by line server according to arriving first " getting principle earlier ", and write down the owner of present speaking right;
12, repeating step 1～11;
13, behind the end of conversation, on-hook side sends on-hook message to line server, notifies the opposing party on-hook by line server; Simultaneously, line server sends end of calling message to broadband gateway, and broadband gateway is deleted this call information.
As shown in Figure 5, " one-to-many " PTT call flow that private user participates in is an example with three parts, PTT customer end A, B and C are after the line server registration is finished, the A line server sends the PTT call request, and the PTT calling of A to B and C held in request, and process is as follows:
1, A describes the media information of oneself with SDP, and this SDP is encapsulated among the SIP-MESSAGE message, then this message is sent to line server;
2, line server carries out the presence inspection, and inspection is passed through, and this PTT call request is transmitted to B and C, writes down owner's (belonging to A) of present speaking right simultaneously;
3, line server sends the PTT call information to broadband gateway;
4, broadband gateway record PTT call information, and the medium Bao Bingxiang B and the C forwarding of preparing reception A;
5, B and C receive after the PTT call request, open media channel, prepare to receive the medium of the A that comes from broadband gateway, and decoding is play;
6, B and C send call message to line server, are transmitted to A by line server;
7, B and C send the UDP message to the broadband webmaster, so that get through broadband gateway is transmitted medium to B and C routing channel;
8, A receives after the PTT call of B, opens media channel, begins to gather local media, sends to broadband gateway after compressed encoding;
9, broadband gateway is transmitted the medium bag of A respectively to B and C;
101, after the A speech finishes, send message to line server and discharge speaking right, line server notice B and C; Simultaneously, line server sends message to broadband gateway, and broadband gateway stops the forwarding of medium bag;
11, A, B and C can send the speaking right application to line server, distribute speaking right by line server according to arriving first " getting principle earlier ", and write down the owner of present speaking right;
12, repeating step 1～11;
When 13, a side withdraws from, send message to line server, line server notice broadband gateway, broadband gateway is adjusted medium bag forwarding mechanism; When only surplus two square tubes were talked about, side's on-hook sent message to line server, notifies the opposing party on-hook by line server; Simultaneously, line server sends end of calling message to broadband gateway, and broadband gateway is deleted this call information.
System configuration of the present invention is simple, and system has good practicality and extensibility.Adopt SIP-MESSAGE to carry out the mutual of call signaling between client and the server, media information adopts the SDP agreement of standard to describe.Under the cooperation of PTT client, line server and broadband gateway, can realize the PTT of " one to one " or " one-to-many " calling between the user in the different network domains.The PTT that the present invention is not only applicable between the public network user calls out, but also the private user that support has network address translation function.Among the present invention, the Media Stream between the public network user directly sends to each other; For private user, in the presence of broadband gateway, can realize the mutual of Media Stream, especially, when carrying out " one-to-many " PTT calling, the calling party only needs Media Stream is sent to broadband gateway, by broadband gateway according to the PTT call information to each called forwarding medium.
Compared with prior art, the present invention has inherited the traditional advantage that PTT calls out, and call setup is simple and efficient.Simultaneously, because the transmission of the medium bag among the present invention adopts the RTP/RTCP agreement to realize, greatly improved the real-time of media delivery, in addition, because the higher reliability of broadband gateway, the reliability that makes PTT call out has obtained effective guarantee.
Claims (10)
1, a kind of PTT business realizing system based on voip technology comprises the PTT client, is used to initiate/accept the PTT call request, and carries out the encoding and decoding of Media Stream, it is characterized in that, also comprises:
User's line server is used to accept the registration of described client, the connection attribute of record client, and transmit the PTT call request in view of the above, in the PTT of having only the public network client to participate in is called out, assist directly to set up between the described client media channel, switched-media bag;
Broadband gateway equipment, link to each other with described user's line server by internal interface, the PTT that is used for participating in the private network client with network address translation apparatus is called out, carrying out signaling with described line server consults, and be that described client is set up media channel as intermediary, the switched-media bag.
2, the PTT business realizing system based on voip technology as claimed in claim 1 is characterized in that described public network client, comprises the public network user on the internet, and is positioned at same local area network users; Described private network client is not in same local area network users.
3, a kind of PTT service implementation method based on voip technology is characterized in that comprising the steps:
(1) the PTT client is registered to user's line server;
(2) PTT caller originating end sends call request to described line server;
(3) described line server belongs to public network user according to user's network attribute in this call request judgement call group still private user;
(4) described line server to called end forwarded call signaling, assists to set up the media channel between the user according to network attribute, the switched-media bag,
Wherein, for the calling of having only public network user to participate in,, directly set up media channel between the user, the switched-media bag by described line server forwarded call signaling;
For the calling that the private user with network address translation function participates in, by described line server forwarded call signaling, and carry out signaling with broadband gateway and consult, set up media channel via broadband gateway, the switched-media bag.
4, the PTT service implementation method based on voip technology as claimed in claim 3, it is characterized in that described step (1), when client is registered to user's line server, the connection attribute of oneself need be sent to line server, connection attribute comprises: the IP address of client place computer and the port numbers of connection.
5, the PTT service implementation method based on voip technology as claimed in claim 3, it is characterized in that described step (3), line server is to register employed address and port numbers according to the connection attribute of client and client to line server, comes the network attribute of user side in the call group is judged.
6, the PTT service implementation method based on voip technology as claimed in claim 3 is characterized in that the described calling of having only public network user to participate in, and its processing procedure comprises the steps:
(1) calling terminal with the SDP protocol description, and is encapsulated into the media information of oneself among the SIP-MESSAGE message with it, sends to line server;
(2) line server is according to the state of this message inspection called end, if called end is in busy state, then directly send call failure message to calling terminal, otherwise, line server is transmitted to called end with this call request, writes down the owner of present speaking right simultaneously;
(3) called end receives after the call request, opens media channel, prepares to receive the medium bag that comes from calling terminal, and the decoding broadcast, simultaneously call is encapsulated among the SIP-MESSAGE message, and line server is given in loopback;
(4) line server sends to calling terminal with the call message of called end;
(5) calling terminal receives after the call of called end, begins to gather local media, sends to called end after compressed encoding;
(6) after the calling terminal speech finishes, stop the transmission of medium bag, send message to line server simultaneously and discharge speaking right, line server notice called end;
(7) calling terminal and called end send the speaking right application to line server, distribute speaking right by line server according to " First come first served " principle, and write down the owner of present speaking right;
(8) repeating step (1)～(7);
(9) behind the end of conversation, on-hook side sends on-hook message to line server, notifies the opposing party on-hook by line server.
7, the PTT service implementation method based on voip technology as claimed in claim 3 is characterized in that the calling that described private user participates in, and its processing procedure comprises the steps:
(1) calling terminal is described the media information of oneself with SDP, and it is encapsulated among the SIP-MESSAGE message, then the network address translation apparatus of this message by this local area network (LAN) is sent to line server, writes down the owner of present speaking right simultaneously;
(2) line server is checked the state of called end, if called end is in busy state, then send call failure message to calling terminal, otherwise, line server is transmitted to the network address translation apparatus of called end local area network (LAN) of living in this call request, and sends to called end by this network address translation apparatus;
(3) line server sends call information to broadband gateway;
(4) broadband gateway metered call information, and prepare to receive and transmit the medium bag that comes from calling terminal;
(5) called end receives after the call request, opens media channel, prepares to receive the medium bag that comes from calling terminal, and the decoding broadcast, simultaneously call is encapsulated among the SIP-MESSAGE message, gives line server by the network address translation apparatus loopback;
(6) called end sends the UDP message to broadband gateway, so that get through broadband gateway is transmitted routing channel from medium to called end;
(7) line server sends to calling terminal with the call message of the called end network address translation apparatus by calling terminal;
(8) calling terminal receives after the call of called end, begins to gather local media, sends to broadband gateway by network address translation apparatus after compressed encoding;
(9) broadband gateway is transmitted the medium bag of calling terminal to called end;
(10) after the calling terminal speech finishes, stop the transmission of medium bag, send message to line server simultaneously and discharge speaking right, line server notice called end;
(11) calling terminal and called end send the speaking right application to line server, distribute speaking right by line server according to arriving first " getting principle earlier ", and write down the owner of present speaking right;
(12) repeating step (1)～(11);
(13) behind the end of conversation, on-hook side sends on-hook message to line server, notifies the opposing party on-hook by line server, and simultaneously, line server sends end of calling message to broadband gateway, and broadband gateway is deleted this call information.
8, as claim 6 or 7 described PTT service implementation method, it is characterized in that described called end can comprise a plurality of PTT clients based on voip technology.
9, the PTT service implementation method based on voip technology as claimed in claim 3 is characterized in that described medium bag, comprises audio stream and video flowing.
10, the PTT service implementation method based on voip technology as claimed in claim 3 is characterized in that described switched-media bag step, uses the RTP/RTCP agreement to finish.
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| CNB2005100556687A CN100417245C (en) | 2005-03-22 | 2005-03-22 | PTT service realizing system and method based on VoIP technique |
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| CNB2005100556687A CN100417245C (en) | 2005-03-22 | 2005-03-22 | PTT service realizing system and method based on VoIP technique |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101247385B (en) * | 2007-02-13 | 2012-07-25 | 国际商业机器公司 | Method , terminal and system for establishing VolP communication by digital video broadcasting network |
| CN103442454A (en) * | 2013-09-12 | 2013-12-11 | 杭州绿宇通信技术有限公司 | Point-to-point communication system and method suitable for WIFI (Wireless Fidelity) mobile phones |
| CN104113511A (en) * | 2013-04-17 | 2014-10-22 | 中国移动通信集团公司 | IMS network access method, system, and correlative device |
| CN111970649A (en) * | 2020-08-14 | 2020-11-20 | 上海三吉电子工程有限公司 | Fusion mobile terminal suitable for front-line police officer and application thereof |
| CN113079144A (en) * | 2021-03-24 | 2021-07-06 | 上海井星信息科技有限公司 | SIP WebRTC gateway system penetrating DMZ network |
| CN113315877A (en) * | 2020-02-27 | 2021-08-27 | 成都鼎桥通信技术有限公司 | Call processing method for private network terminal |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8036122B2 (en) * | 2003-04-03 | 2011-10-11 | Alcatel Lucent | Initiation of network treatment for data packet associated with real-time application different from network treatment applicable to data packet non-associated with the real-time application |
| CN100473075C (en) * | 2004-06-08 | 2009-03-25 | 中兴通讯股份有限公司 | One push business terminal for wiring system and method for carrying out it |
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2005
- 2005-03-22 CN CNB2005100556687A patent/CN100417245C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101247385B (en) * | 2007-02-13 | 2012-07-25 | 国际商业机器公司 | Method , terminal and system for establishing VolP communication by digital video broadcasting network |
| CN104113511A (en) * | 2013-04-17 | 2014-10-22 | 中国移动通信集团公司 | IMS network access method, system, and correlative device |
| CN103442454A (en) * | 2013-09-12 | 2013-12-11 | 杭州绿宇通信技术有限公司 | Point-to-point communication system and method suitable for WIFI (Wireless Fidelity) mobile phones |
| CN103442454B (en) * | 2013-09-12 | 2017-06-20 | 杭州绿宇通信技术有限公司 | Suitable for the Point-to-Point Communication System and its method of WIFI mobile phones |
| CN113315877A (en) * | 2020-02-27 | 2021-08-27 | 成都鼎桥通信技术有限公司 | Call processing method for private network terminal |
| CN111970649A (en) * | 2020-08-14 | 2020-11-20 | 上海三吉电子工程有限公司 | Fusion mobile terminal suitable for front-line police officer and application thereof |
| CN111970649B (en) * | 2020-08-14 | 2021-05-25 | 上海三吉电子工程有限公司 | Application of integrated mobile terminal suitable for front-line police officer |
| CN113079144A (en) * | 2021-03-24 | 2021-07-06 | 上海井星信息科技有限公司 | SIP WebRTC gateway system penetrating DMZ network |
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| Publication number | Publication date |
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| CN100417245C (en) | 2008-09-03 |
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