WO2014040433A1

WO2014040433A1 - Implementation method and implementation system for ptt call based on voip technology

Info

Publication number: WO2014040433A1
Application number: PCT/CN2013/077159
Authority: WO
Inventors: 吴奇峰
Original assignee: 惠州Tcl移动通信有限公司
Priority date: 2012-09-17
Filing date: 2013-06-13
Publication date: 2014-03-20
Also published as: CN102916939A

Abstract

Disclosed are an implementation method and implementation system for a PTT call based on VoIP technology. A header extension is performed on an RTP voice data packet transmitted to a PTT client, a data source identifier of a current call is configured in a header extension part, and a PTT server is allowed to determine a permission-to-speak of the PTT client on the basis of the data source identifier currently being passed through, and to transmit to a third-party PTT client in the form of a multicast the RTP voice data packet transmitted by the PTT client having the permission-to-speak, thus implementing a group call function. Also, the implementation of the performance of the header extension on the RTP voice data packet is relatively simple and easy to implement, and only one data source identifier is needed to allow the PTT server to make a correct determination, thus facilitating system design and promotion.

Description

PTT call implementation method and implementation system based on VOIP technology

[Technical Field]

The invention relates to the application field of mobile terminal communication technology, in particular to a PTT call implementation method and implementation system based on VOIP technology.

【Background technique】

The full name of VoIP is Voice On IP, which is an Internet-based call. From the perspective of usage, it can achieve peer-to-peer calls like a normal mobile phone. The biggest advantage of VoIP is that the call is cheap, but one-to-many calls cannot be achieved.

The full name of PTT is Push To Talk, which is a one-touch call, which functions like a traditional walkie-talkie. The advantage of PTT is that it has a group call function. It can be grouped into groups, for example, if there are ten people set up in a group, then one person is speaking and the other nine can hear it. Companies, organizations (such as hotels, airports) or organizations (such as construction teams) can form a group to use this group call function, and do not have to call one by one.

With the development of communication technology, it is possible to implement PTT group call based on VOIP technology, but the existing implementation methods and systems are too complicated and not conducive to promotion.

Therefore, the prior art has yet to be improved and developed.

[Summary of the Invention]

The technical problem to be solved by the present invention is to provide a basis for the above-mentioned drawbacks of the prior art.

The PTT call implementation method and implementation system of VOIP technology solves the group call function of VOIP, and makes the design of PTT group call based on VOIP technology simple and easy to promote.

In order to solve the above technical problem, one technical solution adopted by the present invention is to provide a method for implementing a PTT call based on VOIP technology, including the following steps: A. Heading a RTP voice data packet to be sent by a PTT client having a VOIP function Expanding, setting a data source identifier of the current call in the header extension, and transmitting the header-expanded RTP voice data packet to the PTIP-enabled PTT server; wherein the step A includes: the PTT client is to be sent The extended bit position 1 of the RTP fixed header in the RTP voice data packet increases the header extension portion for the RTP fixed header; B. The PTT server reads the data of the current call in the RTP voice data packet after the header extension Source identifier, and determining, according to the range of the interval in which the value of the data source identifier of the current call is located, determining the PTT client The step B further includes: when the value of the data source identifier of the current call is 0x1, the PTT client has a preemption right; when the value of the data source identifier of the current call is in the interval 0x2-0xFFFFFF, the PTT client does not have a preemption right, and applies for obtaining a floor when no third party PTT client speaks; when the value of the data source identifier of the current call is in the interval Ox 1000000-OxFFFFFFFF, The PTT client has no floor. C. When it is determined that the PTT client has a floor, the PTT server sends the extended RTP voice packet to the third-party PTT client in multicast form.

The step B further includes: when the PTT server receives the extended RTP voice data packet, determining whether there is voice data in the extended RTP voice data packet; when the header is expanded When there is no voice data in the RTP voice data packet, it is determined that the PTT client gives up the floor, otherwise the speaking permission of the PTT client is determined by the range of the range in which the value of the data source identifier of the current call is located.

The data source identifier of the current call in the step A uniquely identifies a PTT client, and the PTT server determines the speaking permission of the PTT client accordingly.

The data source identifier of the current call is 4 bytes in length.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a method for implementing a PTT call based on VOIP technology, which includes the following steps: A. RTP voice data to be sent by a PTT client having a VOIP function The packet is extended by the header, the data source identifier of the current call is set in the header extension part, and the extended RTP voice data packet is sent to the POT server with the VOIP function; B. After the PTT server reads the header extension The data source identifier of the current call in the RTP voice data packet, and determining the speaking permission of the PTT client according to the range of the range in which the value of the data source identifier of the current call is located; C. determining that the PTT client has The floor, the PTT server sends the extended RTP voice data packet to the third-party PTT client in multicast form.

The step A includes: the PTT client adds the extended bit position 1 of the RTP fixed header in the RTP voice data packet to be sent, and adds the header extension to the RTP fixed header.

The step B further includes: when the value of the data source identifier of the current call is 0x1, the PTT client has a preemption right; when the value of the data source identifier of the current call is in the interval 0x2-0xFFFFFF The PTT client does not have the right to speak, and applies for obtaining the floor when no third-party PTT client speaks; when the value of the data source identifier of the current call is in the interval Ox 1000000-OxFFFFFFFF, the PTT client There is no right to speak. θ. The step B further includes: when the PTT server receives the extended RTP voice data packet, determining whether there is voice data in the extended RTP voice data packet; When there is no voice data in the extended RTP voice data packet, it is determined that the PTT client gives up the floor, otherwise the speaking permission of the PTT client is determined by the range of the range in which the value of the data source identifier of the current call is located.

The data source identifier of the current call is 4 bytes in length.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a PTT call implementation system based on VOIP technology, which includes a PTT client and a PTT server having a VOIP function, wherein the PTT client is used for Performing header expansion on the RTP voice data packet, setting a data source identifier of the current call in the header extension portion, and transmitting the header extended RTP voice data packet to the PTT server; the PTT server is configured to receive the PTT client Sending the extended RTP voice data packet, and obtaining the data source identifier of the current call, determining the speaking permission of the PTT client by using the data source identifier of the current call, and according to the speaking permission of the PTT client Make an operation of whether to send the RTP voice data packet to the third-party PTT client in a multicast manner.

The PTT client and the PTT server are both VOIP-enabled mobile terminals, and the PTT client is multiple, and the PTT server is one.

The method and the implementation system for implementing the PTT call based on the VOIP technology provided by the present invention, by performing header expansion on the RTP voice data packet sent by the PTT client, setting the data source identifier of the current call in the header extension portion, so that the PTT server can pass the current pass. The data source identifier determines the speaking permission of the PTT client, and the RTP voice data packet sent by the PTT client with the floor is sent to the third-party PTT client in multicast form to implement the group call function. Moreover, the implementation of the header extension of the RTP voice data packet is relatively simple, and is easy to implement. The PTT server can make a correct decision only through a data source identifier, which facilitates the design and promotion of the system.

[Description of the Drawings]

FIG. 1 is a schematic structural diagram of a PTT call implementation system based on VOIP technology provided by the present invention. 2 is a flow chart of a method for implementing a PTT call based on VOIP technology provided by the present invention.

FIG. 3 is a flowchart of a method for determining a speaking right of a PTT client by a PTT server according to a VOIP-based PTT call implementation method provided by the present invention.

4 is a flow chart of a method for determining a PTT server in a PTT call implementation method based on VOIP technology provided by the present invention.

Correction page (1⁄2 then Article 9 1) 【detailed description】

The present invention will be further described in detail below with reference to the accompanying drawings. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The present invention provides a method and an implementation system for implementing a PTT call based on VOIP technology. As shown in FIG. 1, the system includes a plurality of PTT clients and a PTT server, and both the PTT client and the PTT server have VOIP (based on the Internet). The mobile terminal of the function of the call, the PTT client can be a mobile phone used by the user for the user to make a PTT call, and in order to improve the data processing rate, the PTT server can be used for the computer, for voice receiving and multicasting, and which PTT is decided. The client has the right to speak.

The system is implemented by software. Each PTT client performs data transmission with the PTT server through RTP (Real-Time Transport Protocol), and the PTT server arbitrates the RTP voice data packet sent by the PTT client according to the data source identifier in the RTP voice data packet. The PTT client's speaking permission is determined, and the RTP voice data packet is distributed to the third-party PTT client in a multicast form according to the speaking permission of the PTT client.

Specifically, the PTT client is used for header expansion of the RTP voice data packet, adding an extension part after the RTP fixed header of the RTP voice data packet, and setting a data source identifier of the current call in the header extension part, and then The extended RTP voice data packet is sent to the PTT server, where the data source identifier of the current call is used to identify the speaking permission of the current call of the PTT client, and the PTT server may use the value of the data source identifier of the current call. Determine the speaking permission of the PTT client.

The PTT server is configured to receive a header extended RTP voice data packet sent by the PTT client, obtain a data source identifier of the current call, and determine, by using a data source identifier of the current call, a speech of the PTT client. Authorization, and according to the speaking permission of the PTT client, whether to send the RTP voice data packet to the third-party PTT client in a multicast manner.

In combination with the VOIP-based PTT call implementation system provided by the present invention, the present invention further provides a PTIP-based PTT call implementation method. As shown in FIG. 2, the method includes the following steps: Step S100: Passing a POT with VOIP function The client performs header expansion on the RTP voice data packet to be sent, sets a data source identifier of the current call in the header extension portion, and sends the extended RTP voice data packet to the POT server with the VOIP function;

Step S200: The PTT server reads the data source identifier of the current call in the extended RTP voice data packet, and judges according to the range of the value of the data source identifier of the current call. Disconnecting the speaking permission of the PTT client;

Step S300: When it is determined that the PTT client has a floor, the PTT server sends the extended RTP voice data packet to a third-party PTT client in multicast form.

The above steps will be described in detail below with reference to specific embodiments.

During the actual call, multiple PTT clients will simultaneously send RTP voice packets to the PTT server through the RTP protocol, and the PTT server will decide on each RTP voice packet received, and decide which PTT client has the floor, and The RTP voice data packet of the PTT client with the voice is sent to the third-party PTT client in multicast form, thereby implementing the group call function.

In order to facilitate the PTT server to make a correct ruling on the PTT client, the PTT client performs header extension on the RTP voice packet to be sent. The format of the RTP fixed header is as follows:

01234567890123456789012345678901

+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_ +_+_+_+_+_+_+_

|V=2|P|X| CC |M| PT | Serial Number |

+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_ +_+_+_+_+_+_+_

I time stamp I

_+_+_+_++_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_ +_+_+_+_+_+_+_+_+_+_+_

1 Data source identification I

+ =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+= +=+=+=+

I Contribution Data Source I

I ...- I

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+--+-+-+-+ where the data source identifier is used to identify different data sources, each data source has a data source identifier, and there is a data source set up. X represents the extended bit. If X is set to 1, it means that there is an extended part after the fixed header. The format of the header extension is:

01234567890123456789012345678901

+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_ +_+_+_+_+_+_+_

1 Define the format I length | +_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_ +_+_+_+_+_+_+_+_+_+_

I header extension I

I ...- I

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+- where the header extension includes a 16-bit length field indicating the number of 32-bit words in the extension. Only one header extension is allowed after the RTP fixed header. The first 16 bits of the extension are used to identify the identifier or parameter. This 16-bit format is not specified in the RTP, but is defined by the upper layer protocol of the specific implementation. Since the PTT does not need to use these 16 bits, all 16 bits are set to zero.

Therefore, the present invention adds an extended portion of the RTP fixed header to the extended bit position 1 of the RTP fixed header in the RTP voice data packet to be transmitted. The format of the PTT header extension is:

01234567890123456789012345678901

+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_+_ +_+_+_+_+_+_+_

1 Data source identifier of the current call I

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+- where the first 16 bits are all set to 0, and the length is 1, indicating that only the data source identifier of the current call is added, and the data source identifier of the current call is 4 bytes. Indicates the data source identifier that currently holds the floor, that is, the PTT client that holds the floor. If no PTT client gets the floor, the data source ID of the current call is all set to 0.

The extension of the RTP of the present invention is mainly for adding a data source identifier of a current call, the data source identifier of the current call is set by the PTT client, and is unique, and the PTT server can decide which PTT client has a speech according to the PTT server. right.

After receiving the RTP voice data packet sent by the PTT client for the header extension, the PTT server reads the data source identifier of the current call in the extended portion of the RTP voice data packet, and then according to the value of the data source identifier of the current call. The range of the interval determines the speaking authority of the PTT client.

As can be seen from the table shown in FIG. 3, when the value of the data source identifier of the current call is 0x1, the PTT client has a preemption right; when the value of the data source identifier of the current call is in the interval 0x2-0xFFFFFF, the PTT client does not have a preemption right, and applies for obtaining a floor when no third-party PTT client speaks; when the value of the data source identifier of the current call is in the interval Ox 1000000-OxFFFFFFFF, The PTT client has no say.

The PTT server performs corresponding operations according to the speaking authority of the PTT client. If there is a floor, the RTP voice data packet sent by the PTT client is sent to the third-party PTT client in a multicast manner, and the third-party PTT client can listen to the call content of the PTT client through the RTP voice data packet, which is well implemented. The group call function. .

Of course, after receiving the RTP voice data packet, the PTT server will judge the RTP voice data packet. Whether it contains voice data. If there is no voice data, it is determined that the PTT client gives up the current floor; and if there is voice data, the user level is distinguished by the data source identifier of the current call, thereby determining the floor.

As shown in Figure 4, the specific steps for the PTT server to make a ruling are as follows:

511. Whether the RTP voice data packet is received; if yes, go to step S12, otherwise continue to determine whether the RTP voice data packet is received;

512, whether there is voice data in the RTP voice data packet; if yes, step S14 is performed, otherwise step S13 is performed;

513, give up the right to speak, and return to step S11;

514. Determine, according to the value of the data source identifier of the current call, the speaking permission of the PTT client.

515, if the value of the data source identifier of the current call is 0x1, the PTT client is a super speaker, and step S16 is performed;

516, obtain the right to speak, and return to step S11;

517. If the value of the data source identifier of the current call is in the interval 0x2-0xFFFFFF, the PTT client is the speaker, and step S18 is performed;

518. Is there currently a PTT client speaking, if it is performing step S20, otherwise executing steps

S16;

519, if the value of the data source identifier of the current call is in the interval OxlOOOOOO-OxFFFFFFFF, the PTT client is the listener, and step S20 is performed;

520, no speaking, and return to step S11.

The invention performs header expansion on the RTP voice data packet sent by the PTT client, and sets the data source identifier of the current call in the header extension part, so that the PTT server decides the speaking permission of the PTT client according to the currently adopted data source identifier, and the speaker will have a speech. The RTP voice data packet sent by the PTT client of the right is sent to the third-party PTT client in multicast form to implement the group call function. Moreover, the implementation of the header extension of the RTP voice data packet is relatively simple and easy to implement, and the PTT server can make a correct decision only through a data source identifier, which facilitates the design and promotion of the system.

It is to be understood that the application of the present invention is not limited to the above-described examples, and those skilled in the art can make modifications and changes in accordance with the above description, all of which are within the scope of the appended claims.

Claims

Rights request

A method for implementing a PTT call based on VOIP technology, comprising the steps of:

A. The header of the RTP voice data packet to be sent by the PTT client with the VOIP function is extended, the data source identifier of the current call is set in the header extension part, and the extended RTP voice data packet is sent to the VOIP-enabled function. a PTT server, wherein the step A includes: the PTT client adds an extended bit position 1 of the RTP fixed header in the RTP voice data packet to be sent, and adds the header extension portion to the RTP fixed header;

B. The PTT server reads the data source identifier of the current call in the extended RTP voice data packet, and determines the PTT client according to the range of the range in which the value of the data source identifier of the current call is located. The speaking permission; wherein, the step B further includes:

When the value of the data source identifier of the current call is 0x1, the PTT client has a preemption right;

When the value of the data source identifier of the current call is in the interval 0x2-0xFFFFFF, the PTT client does not have the preemption right, and applies for obtaining the floor when no third party PTT client speaks; when the current call data When the value of the source identifier is in the interval Ox1000OOO-OxFFFFFFFF, the PTT client has no floor;

C. When it is determined that the PTT client has a floor, the PTT server sends the extended RTP voice packet to the third-party PTT client in multicast form.

The VOIP-based PTT call implementation method according to claim 1, wherein the step B further includes:

And receiving, by the PTT server, the RTP voice data packet after the header extension, determining whether there is voice data in the extended RTP voice data packet;

Determining that the PTT client gives up the floor when there is no voice data in the extended RTP voice data packet, otherwise determining the speaking permission of the PTT client by the range of the range in which the value of the data source identifier of the current call is located .

The VOIP-based PTT call implementation method according to claim 1, wherein the data source identifier of the current call in the step A uniquely identifies a PTT client, and the PTT server determines The speaking permission of the PTT client.

The VOIP-based PTT call implementation method according to claim 3, wherein the data source identifier length of the current call is 4 bytes.

A. The header of the RTP voice data packet to be sent by the PTT client with the VOIP function is extended, the data source identifier of the current call is set in the header extension part, and the extended RTP voice data packet is sent to the VOIP-enabled function. PTT server;

B. The PTT server reads the data source identifier of the current call in the extended RTP voice data packet, and determines the PTT client according to the range of the range in which the value of the data source identifier of the current call is located. Right to speak;

The VOIP-based PTT call implementation method according to claim 5, wherein the step A includes:

The PTT client adds the extended bit position 1 of the RTP fixed header in the RTP voice data packet to be sent, and adds the header extended portion to the RTP fixed header.

The VOIP-based PTT call implementation method according to claim 5, wherein the step B further includes:

When the value of the data source identifier of the current call is in the interval 0x2-0xFFFFFF, the PTT client does not have the preemption right, and applies for obtaining the floor when no third party PTT client speaks; when the current call data When the value of the source identifier is in the interval Ox1000OOO-OxFFFFFFFF, the PTT client has no floor.

The VOIP-based PTT call implementation method according to claim 5, wherein the data source identifier of the current call in the step A uniquely identifies a PTT client, and the PTT server determines The speaking permission of the PTT client.

The VOIP-based PTT call implementation method according to claim 9, wherein the data source identifier length of the current call is 4 bytes.

A PTT call implementation system based on VOIP technology, comprising: a PTIP-enabled PTT client and a PTT server, wherein

The PTT client is configured to perform header expansion on the RTP voice data packet, set a data source identifier of the current call in the header extension portion, and send the extended RTP voice data packet to the PTT server.

The VOIP-based PTT call implementation system according to claim 11, wherein the PTT client and the PTT server are both VOIP-enabled mobile terminals, and the PTT client is multiple. The PTT server is one.