CN101478736A - Peer-to-peer VOIP call establishment protocol for mobile data network - Google Patents

Abstract

A point-to-point VOIP conversation establishment method based on mobile data network can realize the point-to-point VOIP conversation among mobile terminals in the case of not depend on network registration servers. The point-to-point VOIP conversation establishment method of the invention is established on the basis of a 3-direction conversation mechanism. A caller establishes an instant message containing the IP address thereof at first, and then the instant message is sent to a callee through short messages, multimedia messages or other instant message transmission technology. After the caller receives the instant invitation method, the callee extracts the IP address of the caller from the instant message, establishes an IP data packet containing the IP address of the own and then sends the IP data packet to the caller to start the point-to-point VOIP conversation. The caller extracts the IP address of the callee from the received IP data packet and confirms the conversation through sending the IP data packet. The point-to-point VOIP conversation establishment mechanism is easy to carry out and can establish VOIP conversation effectively on the mobile data network; therefore, the invention is suitable for handheld devices, such as mobile phones, etc.

Description

The invention of the point-to-point VOIP call establishment protocol of mobile data network

Technical field

The present invention relates to a kind ofly realize the method for point-to-point VOIP conversation, and do not rely on any network registry server based on mobile data network.

At mobile data network, as GPRS, EDGE among the 3G, if known callee's IP address, promptly can realize the VOIP conversation.In mobile data network, the terminal of mobile phone does not have fixed IP addresses.When terminal had by one that fixedly the server of IP is registered, the mobile data network center can dynamic assignment IP address.When the caller wanted to dial a VOIP phone, this calling procedure was just set up by this registrar.Yet no matter from technical standpoint or economic angle, the cost of safeguarding a registrar all is very expensive.

The major function of registrar is the IP address of safeguarding each mobile phone terminal.If the caller has way to know callee's IP address, there is not the help of registrar so, conversation also can realize.

The point-to-point VOIP method of the present invention allows the caller to dial the VOIP phone by mobile data network, and does not rely on the help of network registry server.

Say that in principle the inventive method provides point-to-point VOIP conversation to set up engine and is applicable on the handheld device of supporting mobile data service, comprises GPRS, CDMAlx, EDGE and 3G mobile etc.

Background technology

Based on the multimedia application of mobile data network is critical services content to the cellphone subscriber.Along with the continuous increase of mobile data network bandwidth, instant multimedia is used, and just can realize as visual telephone.

The traditional solution of the VOIP function of mobile data network support is to go to invite the called party by a registrar, as shown in Figure 1.Using registrar is because mobile phone terminal does not have fixed IP addresses.When mobile phone passed through mobile network register, the mobile network can distribute to its IP address.Yet, safeguard a registrar, still all be very expensive technically economically.If the caller knows callee's IP address, the caller just can not pass through registrar so, directly uses callee's IP address to converse.

The present invention is devoted to seek a kind of mode, makes portable terminal can realize the VOIP conversation under without any the situation of network registry server.As shown in Figure 2.

Summary of the invention

First target of the present invention provides a kind of method, under the situation of not using any network registry server, obtains the employed IP of communication address.

Second target of the present invention provides a kind of method, allows arbitrary portable terminal that is connected to IP network to realize the VOIP conversation with another portable terminal with said function.

The 3rd target of the present invention provides a kind of point-to-point VOIP conversation method for building up, and this method can significantly not change the traditional call behavior.

The example principle according to the present invention is set up engine by point-to-point VOIP conversation is provided, and with its wideest form that contains, by note, multimedia message or any other instantaneous communication system send to the callee with caller's IP.The process of setting up that IP address that the callee receives use and caller begin to converse by IP network.After the conversation that receives the callee was invited, the caller confirmed conversation, the interchange of beginning both sides audio/video information.

Description of drawings

Fig. 1 uses traditional VOIP conversation principle schematic of server.

Fig. 2 does not use the VOIP conversation principle schematic of medium server

Fig. 3 traditional double is to the communication process principle schematic

The point-to-point VOIP of Fig. 4 three-dimensional of the present invention machine-processed principle schematic of conversing

Embodiment

Use based on the VOIP of IP network, the caller must know called party's IP address before beginning to converse.In mobile data network, when networking, portable terminal can dynamically be assigned to an IP address.Therefore, use registrar to set up the online VOIP conversation of mobile data usually.

Registrar has a fixed IP addresses.When mobile terminal Internet access, the IP address can be sent to server, server will keep the IP address of each portable terminal up to this terminal log-down.When with mobile phone dialing VOIP phone, because at this moment the caller does not know callee's IP, the caller can send a conversation message request to registrar, and server is forwarded to the callee with this information again.After the callee accepted conversation invitation, its can postback an information that contains its IP by registrar, and registrar is forwarded to the caller with this information again.So exhale receipts person just to know by the person's of exhaling IP.After this, just can break away from registrar, directly between both sides, exchange as multimedia messagess such as sound, videos.Yet, safeguard that a registrar no matter technically still from economically, all is very expensive.

The basic function of registrar is the IP address of safeguarding portable terminal.If when the IP address of portable terminal can obtain by other approach, just needn't re-use registrar.

When mobile terminal Internet access, will be assigned to an IP address.Terminal is known its IP address and callee's telephone number.Because some non-real-time datas are used, as note, multimedia message or other instant messages transmission technology send data message with phone number.These mature technique can be used to help to set up the VOIP conversation.

The foundation of traditional call is two-way process, as shown in Figure 3,1) caller sends a conversation message request with callee's number to the callee; 2) callee accepts or refuses this conversation invitation.

Among the present invention, the VOIP conversation has become the three-dimensional process, as shown in Figure 4.1) caller is by note, and multimedia message or other instant messages transmission technology send a message request that comprises its IP address to the callee; 2) receive message request after, the callee has two kinds of selections: a) call accepted: send an IP datagram that comprises the conversation startup of its IP address to the caller, b) refusal is called out: or by note or information of refusing conversation of multimedia message transmission, or simply ignore it; 3) if the caller receives the information that the callee converses and can begin, conversation has just begun, and audio/video multimedia information just brings into use both sides' IP address to exchange.

The step that engine is set up in point-to-point VOIP conversation comprises: the caller produces an instant message request that must comprise caller IP address, and this information is passed through note, and multimedia message or other instantaneous transmission technology send to the callee; The callee is from extracting caller's IP address from caller's instant messages, and produces one and comprise the IP packet of its IP address and send to the caller by IP network.So far, both call sides all obtains the IP address that signal post needs the other side.

The insider should be as can be seen, and the sole purpose of the point-to-point VOIP call establishment protocol invention of mobile data network is under the situation without registrar, to realize the point-to-point VOIP conversation based on the mobile data network structure.

Because the point-to-point VOIP call establishment protocol of the present invention example does not need special hardware supports, only can realize its function by software, but do not get rid of special hardware implementation mode, therefore point-to-point VOIP conversation is set up engine and can easily be applied on the portable terminal of any kind, as mobile phone etc.

The front has very described the technology that the present invention submitted in detail, make the insider can understand and use the present invention, but, what also will draw attention to is, under the prerequisite that does not depart from essence of the present invention, can also change and improve the technological invention of being submitted to, and the present invention be subjected to the restriction of above explanation or accompanying drawing, but limited according to claims.

Claims (3)

1. the point-to-point VOIP call establishment protocol based on mobile data network comprises the steps:

A. the caller sets up an instant messages that comprises its IP address;

B. the information of setting up among caller's forwarding step a, and by note, multimedia message or other instant transmission technology send to the callee;

C. extract caller's IP address in the instant messages of callee from step a, and set up an IP packet that contains its IP address, send to the caller with beginning VOIP conversation by IP network.

D. extract callee's IP address in the IP packet of caller from step c, and set up an IP packet and postback to the callee and confirm conversation.

2. the method for claim 1, wherein step a also comprises the IP address of dynamic assignment and sets up the instant messages that contains its IP address.

3. method according to claim 1, wherein step c also is included in the caller's that extraction is sent in the instant message of receiving IP address.

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