CN103841093B - terminal device and network protocol voice communication method - Google Patents

Abstract

The present invention provides a kind of terminal device, in procotol voice system dynamic domain name server is connected to multiple other-end equipment, the terminal device can constitute a group with other-end equipment, when the terminal device call service group outside group is into one in the terminal device of group, user can select any one and calling terminal equipment in the terminal device of the composition group to set up and converse.The present invention also provides a kind of procotol voice system communication means.

Description

Terminal equipment and network protocol voice communication method

technical field

The present invention relates to the field of Voice over Internet Protocol (VoIP), in particular to a terminal device in a Voice over Internet Protocol communication system and a Voice over Internet Protocol communication method.

Background technique

Generally, terminal devices such as Internet phones in Internet protocol voice systems can only have one-to-one correspondence with phone numbers, that is, only one-to-one calls can be made between Internet phones. But in actual use, when a first network phone calls a second network phone, the user of the second network phone may not be beside the second network phone, so it is inconvenient to answer. Therefore need a kind of communication method, can make a plurality of terminal devices form a group and share a phone number, when the user is inconvenient to answer the network call corresponding to the called phone number, can answer the call through other network phones in the group, thereby Realize resource sharing of Internet telephony.

Contents of the invention

In order to solve the above problems, the present invention provides a terminal device, which communicates with a plurality of other terminal devices and a dynamic domain name server in an Internet protocol voice system. The terminal device includes a registration module, which is used to generate a phone call according to a preset algorithm number, and generate the domain name corresponding to the phone number according to preset rules after the phone number, and then register the domain name and the IP address corresponding to the terminal device with the dynamic domain name server. The terminal device also includes: an input receiving module for When receiving the user's input operation to determine that the user's operation needs to join a group, obtain the phone number corresponding to the terminal device as the founder of the group that needs to join; the IP address query module is used to input the phone number obtained by the input receiving module The telephone number generates a corresponding domain name according to the above preset rules, and then generates a query request containing the generated domain name and sends the query request to the dynamic domain name server for querying the dynamic server for the IP address corresponding to the generated domain name; The group establishment and registration module are used to generate a request to join the group after receiving the IP address corresponding to the generated domain name sent by the dynamic domain name server when the input receiving module receives the user's input operation as needing to join a group And send the request to join the group to the terminal device corresponding to the queried IP address, wherein the request to join includes the domain name and IP address of the terminal device that sends the request to join the group; the group registration module is also used to After receiving the confirmation response returned by the terminal device corresponding to the queried IP address, join the group of the terminal device corresponding to the queried IP address. When a terminal device outside the group calls one of the terminal devices forming the group, the user may select any one of the terminal devices forming the group to establish a call with the calling terminal device.

The present invention also provides a terminal device, which communicates with a plurality of other terminal devices and a dynamic domain name server in an Internet protocol voice system. The terminal device includes a registration module, which is used to generate a phone number according to a preset algorithm, and After the telephone number, the domain name corresponding to the telephone number is generated according to preset rules, and then the domain name and the IP address corresponding to the terminal device are registered with the dynamic domain name server. The terminal device also includes: an input receiving module for receiving user input Operation: The group establishes a registration module, which is used to establish a group in response to the user's input operation received by the input receiving module, and when receiving a request to join a group sent by another terminal device in the network protocol voice system, analyze the group Received the request to join the group, and confirm whether to agree to the request to join the group according to the user's input operation, if the input receiving module receives the user's input as an order to reject the request to join the group, then the group registration module according to The rejection command returns a rejection message to the terminal device that sent the request to join the group and rejects the other terminal devices to join the group; if the request to join the group is agreed, the group registration module sends the request to the group to The terminal device returns a confirmation message to add the other terminal device to the group. When a terminal device outside the group calls one of the terminal devices forming the group, the user may select any one of the terminal devices forming the group to establish a call with the calling terminal device. The invention also provides a communication method in the network protocol voice system.

In the terminal equipment and the communication method in the network protocol voice system in the present invention, a plurality of terminal equipments are formed into a group, and when a terminal equipment in the group is called, any terminal equipment in the group can communicate with The caller establishes a call, which facilitates the use of the user and more effectively utilizes the resources of the Internet phone.

Description of drawings

FIG. 1 is a schematic diagram of the architecture of the VoIP system in an embodiment of the present invention.

FIG. 2 is a schematic diagram of functional modules of a terminal device in the VoIP system shown in FIG. 1 .

FIG. 3 is a schematic diagram of signaling transmission in the process of a terminal device joining a group in an Internet protocol voice system according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of signaling transmission during a call process between terminal devices in the Voice over Internet Protocol system in the first embodiment of the present invention.

FIG. 5 is a schematic diagram of signaling transmission during a call process between terminal devices in an IP voice system in a second embodiment of the present invention.

FIG. 6 is a schematic diagram of signaling transmission during a call process between terminal devices in an IP voice system according to a third embodiment of the present invention.

7A-7B are flow charts of a voice communication method over Internet Protocol in an embodiment of the present invention.

Description of main component symbols

Voice over Internet Protocol 100 Dynamic Domain Name Server 10 Chart 11 Terminal Equipment 20a, 20b, 20c registration module twenty one input receiving module twenty two IP address query module twenty three Group creation and registration module twenty four Signaling switching module 25 storage module 26 display module 27

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

detailed description

The terminal equipment and the voice communication method over Internet Protocol in the present invention will be further described in detail below in conjunction with the accompanying drawings.

FIG. 1 is a schematic diagram of the architecture of the VoIP system in an embodiment of the present invention. In this embodiment, the VoIP system 100 includes a dynamic domain name server (DynamicDomain Name Service Server, DDNSServer) 10 , a plurality of terminal devices 20 and an integrated access device 30 . In this embodiment, description will be made by taking a plurality of terminal devices 20 respectively as 20a, 20b, and 20c as an example. The integrated access device 30 is used to connect the plurality of terminal devices 20 a , 20 b , 20 c with the dynamic domain name server 10 . In this embodiment, the plurality of terminal devices 20a, 20b, 20c may be Internet phones, notebook computers or desktop computers, and the like. Wherein, the way for the terminal devices 20a, 20b, 20c to access the dynamic domain name server 10 via the integrated access device 130 is the same as the conventional one. It should be noted that when the terminal devices 20a, 20b, 20c themselves have the function of accessing the network, they can also access the dynamic domain name server 10 by themselves without going through the integrated access device 130 .

The dynamic domain name server 10 includes a comparison table 11 and a processing unit 12. When the terminal equipment 20a, 20b, 20c registers with the dynamic domain name server 10, the processing unit 12 matches the domain name of the terminal equipment 20a, 20b, 20c with the network The protocol (Internet Protocol, IP) address is stored in the comparison table 11. The comparison table 11 includes a domain name field and an IP address field, which are respectively used to store the domain names and IP addresses of the terminal devices 20a, 20b, and 20c. Wherein, the IP address of each storage terminal device 20a, 20b, 20c is uniquely corresponding to the terminal device and is set when the terminal device leaves the factory. For example, the IP address corresponding to the terminal device 20a is 60.199.244.6, the IP address corresponding to the terminal device 20b is 210.59.230.60, and the IP address corresponding to the terminal device 20c is 119.160.246.23.

Please refer to FIG. 2 and FIG. 3 together. Each terminal device 20 includes a registration module 21 , an input receiving module 22 , an IP address query module 23 , a group establishment and registration module 24 , a signaling exchange module 25 and a storage module 26 . In this embodiment, the terminal device 20a is described as including a registration module 21a, an input receiving module 22a, an IP address query module 23a, a group establishment and registration module 24a, a signaling exchange module 25a, and a storage module 26a. 20b correspondingly includes a registration module 21b, an input receiving module 22b, etc., and the terminal device 20c correspondingly includes a registration module 21c, an input receiving module 22c, etc.

The registration module 21 of each terminal device 20 is used to generate respective telephone numbers according to a preset algorithm, and after generating respective telephone numbers, generate respective domain names corresponding to respective telephone numbers according to preset rules, and then associate respective domain names with respective The IP address of is registered with this dynamic domain name server 10. Wherein, the phone number is the network phone number of the terminal device 20 . In this embodiment, the telephone number of each terminal device 20a, 20b, 20c is generated based on the respective MAC (Media Access Control) address using a hash (HASH) algorithm, and the hash algorithm is obtained from each terminal device The last six digits of the MAC address. The preset rule is to combine the phone number with a preset string (such as ".myvoip.net") to form a domain name. For example, if the MAC address of the terminal device 20a is 11:12:31:23, then the phone number of the terminal device 20a is 123123, combined with the area code 0944, the complete phone number of the terminal device 20a is 0944123123. Correspondingly, the domain name of the terminal device 20a is the telephone number 0944123123 combined with the preset string .myvoip.net, namely: 0944123123.myvoip.net. Similarly, if the MAC address of the terminal device 20b is 11:45:64:56, the phone number of the terminal device 20b is 0944456456, and the corresponding domain name is 0944456456.myvoip.net. If the MAC address of the terminal device 20c is 11:78:97:89, the phone number of the terminal device 20c may be 0944789789, and the corresponding domain name is 0944789799.myvoip.net.

After the terminal devices 20a, 20b, 20c are registered with the dynamic domain name server 10, a first terminal device 20a can also form a group with a second terminal device 20b, and call the grouped terminal devices at a third terminal device 20c 20a or 20b, the user can select any one of the terminal devices 20a and 20b forming the group to establish a call with the terminal device 20c.

Specifically, the group establishment and registration module 24 of any terminal device 20 may establish a group in response to the user's operation, for example, the group establishment and registration module 24a of the terminal device 20a responds to the user's operation and establishes a group as the creator. group. When the input receiving module 22b of the terminal device 20b receives the user's input to join the group of the terminal device 20a, the terminal device 20b obtains the phone number corresponding to the founder of the group to be joined through the input receiving module 22b, that is, the terminal device 20a For the corresponding phone number, for example, the input receiving module 22b of the terminal device 20b may receive the user's input of the phone number 0944123123 of the terminal device 20a that needs to join the group through an input unit such as a numeric keypad. The IP address query module 23b in the terminal device 20b generates the corresponding domain name: 0944123123.myvoip.net through the obtained phone number through the preset rules as mentioned above. Then the IP address query module 23b generates a query request that includes the generated domain name 0944123123.myvoip.net, and sends the query request to the dynamic domain name server 10 for querying the generated domain name 0944123123 from the dynamic domain name server 10 The IP address corresponding to .myvoip.net is the IP address of the terminal device 20a requesting to inquire about the group to be joined.

After the processing unit 12 of the dynamic server 10 receives the query request sent by the terminal device 20b, it searches the domain name and IP address of the terminal device stored in the comparison table 11 for the IP address corresponding to the generated domain name, and queries the obtained The IP address is passed back to the terminal device 20b that sent the request. For example, after the dynamic domain name server 10 inquires that the IP address corresponding to the generated domain name 0944123123.myvoip.net is 60.199.244.6, the IP address 60.199.244.6 is sent to Terminal device 20b.

The group establishment and registration module 24b of the terminal device 20b generates a group joining request according to the received IP address of the terminal device 20a sent by the dynamic domain name server 10, and sends the joining group request to the queried The terminal device 20a corresponding to the IP address, wherein the group joining request includes the domain name and IP address of the terminal device 20b sending the request.

After the group establishment and registration module 24a in the terminal device 20a receives the request to join the group sent by the terminal device 20b, it analyzes the request to join the group, such as analyzing the domain name and IP address of the terminal device that sent the request to join the group. , and confirm whether to agree to the group joining request according to the user's input received by the input receiving module 22a. If the request to join the group is not approved, for example, the input receiving module 22a receives a rejection command generated by the user operation, then the group registration module 24a in the terminal device 20a returns a rejection to the terminal device 20b that sent the request to join the group information, rejecting the terminal device 20b from joining the group. If the request to join the group is agreed, the group registration module 24a of the terminal device 20a returns a confirmation response (for example, 200ok) to the terminal device 20b that sent the request to join the group, and the terminal device 20b joins the group, the The group establishment and registration module 24a of the terminal equipment 20a forming the group also stores the domain name and the IP address of the terminal equipment 20b joining the group in its storage module 26a. Similarly, the terminal equipment 20b joining the group The group establishment and registration module 24b also stores the domain name and IP address of the terminal device 20a in its storage module 26b. In this embodiment, each terminal device 20 also includes a display module 27. When the group relationship between the terminal devices is established, the display modules of the terminal devices 20a and 20b that form the group display all the The telephone number is displayed to the users of the terminal devices 20 in any group.

Please refer to Fig. 4, after the terminal equipment 20b joins the group of the terminal equipment 20a, when the input receiving module 22c of the terminal equipment 20c receives the user's input and needs to call a terminal equipment 20a in the group, the terminal equipment 20c first passes the input The receiving module 22c obtains the phone number of the called terminal device 20a input by the user, for example, receives the phone number input by the user through an input device such as a numeric keypad, and the IP address query module 23c in the terminal device 20c will obtain the called terminal device 20a The corresponding domain name is generated according to the predetermined rules as mentioned above, for example, the domain name 0944123123.myvoip.net corresponding to the called terminal device 20a is generated, and a query request containing the generated domain name is sent to the dynamic domain name server 10 , which is used to request the dynamic domain name server 10 to query the IP address corresponding to the called phone number.

After the processing unit 12 in the dynamic domain name server 10 receives the query request sent by the terminal device 20c, it searches the corresponding IP address of the called terminal device 20a in the comparison table 11 and sends the IP address back to the person who sent the query request. Terminal device 20c.

When the signaling switching module 25c in the terminal device 20c receives the user's input that the input receiving module 22c needs to call a terminal device 20a in the group, according to the received IP address of the called terminal device sent by the dynamic domain name server 10, The address generates invitation information (invite), and sends the invitation information to the called terminal device 20a corresponding to the received IP address, so as to request to establish a call. The invitation information includes the identification information of the calling terminal device 20c.

After receiving the invitation information, the signaling switching module 25a in the called terminal device 20a rings and sends a ringing response to the calling terminal device 20c. The domain name and IP address of the terminal device 20b in the group to send an invitation message to the terminal device 20b in the group to notify other terminal devices in the group that the terminal device 20c requests to establish a call, wherein the called terminal The invitation information initiated by the device 20a includes identification information of the calling terminal device 20c.

The signaling exchange module 25b in the terminal device 20b in the group rings after receiving the invitation message initiated by the terminal device 20a and sends a ringing response to the called terminal device 20a (180ringing). The called terminal device 20a and the terminal devices 20b in its group both generate incoming call reminder information, such as playing a ringtone or flashing a display prompt.

If the calling terminal equipment 20c cancels the call during the calling process, the signaling switching module 25c in the calling terminal equipment 20c sends a hangup message to the called terminal equipment 20a, and the signaling switching module of the called terminal equipment 20a After receiving the hang-up information, 25a sends the cancel information to the terminal device 20b in the group, and the whole call process ends.

As shown in Figure 5, if the user answers the call through the called terminal device 20a during the call, the signaling switching module 25a of the called terminal device 20a sends a message to other terminal devices 20 in the group, such as the terminal device 20b Once the cancellation information is received, the signaling exchange module 25b of the terminal equipment 20b in the group cannot establish a call with the calling terminal equipment 20c after receiving the cancellation information. At the same time, the signaling exchange module 25a of the called terminal device 20a also sends a confirmation response (200ok) to the calling terminal device 20c, wherein the confirmation response includes the port information and IP address of the called terminal device 20a answering the call information and other identification information. After receiving the confirmation response, the signaling exchange module 25c of the calling terminal device 20c establishes a voice call with the called terminal device 20a according to the identification information in the confirmation response, that is, transmits voice streams to each other. After the call is completed, the signaling exchange module 25c of the calling terminal device 20c sends a hangup message (Bye) to the called terminal device 20a, and the calling terminal device 20c ends the signaling connection with the called terminal device 20a. Wherein, in this embodiment, after the signaling exchange module 25a of the called terminal device 20a sends a cancel message to other terminal devices 20 in the group, the other terminal devices 20 in the group stop generating call reminder information.

As shown in Figure 6, if the user answers the call through the terminal equipment 20b in the group of the called terminal equipment 20a during the call, the signaling switching module 25b of the terminal equipment 20b in the group sends the call to the called terminal equipment 20a sends a confirmation response (200ok), wherein the confirmation response includes identification information such as port information and IP address information of the terminal device 20b answering the call. The signaling exchange module 25a of the called terminal equipment 20a sends the confirmation response to the calling terminal equipment 20c, and after receiving the confirmation response, the signaling switching module 25c of the calling terminal equipment 20c, according to the identification in the confirmation response The information directly establishes a voice call with the terminal devices 20b in the group, that is, transmits voice streams to each other.

7A-7B are flow charts of a voice communication method over Internet Protocol in an embodiment of the present invention.

Step S701: The registration modules 21a, 21b, and 21c of the terminal devices 20a, 20b, and 20c respectively generate their own phone numbers and generate domain names corresponding to their own phone numbers according to preset rules.

Step S702: The registration modules 21a, 21b, 21c of the terminal devices 20a, 20b, 20c register their own domain names and their own IP addresses with the dynamic domain name server 10 respectively.

Step S703: When the input receiving module 22b of the terminal device 20b receives the user's input to join the group established by the terminal device 20a, the input receiving module 22b of the terminal device 20b obtains the phone number of the founder of the group to be joined, That is, the phone number corresponding to the terminal device 20a, the IP address query module 23c will generate the corresponding domain name through the obtained phone number through the preset rules as mentioned above, and send a query request containing the generated domain name to the dynamic domain name server , is used to request the dynamic domain name server 10 to query the IP address corresponding to the generated domain name, that is, to request to query the IP address of the terminal device 20a of the group to be joined.

Step S704: After the processing unit 12 of the dynamic domain name server 10 receives the query request sent by the terminal device 20b, it queries the domain name and IP address of the terminal device stored in the comparison table 11 for the IP address corresponding to the generated domain name, and sends The queried IP address is sent back to the terminal device 20b that sent the request.

Step S705: When the group establishment and registration module 24b of the terminal device 20b receives the user's input to join the group established by the terminal device 20a when the input receiving module 22b receives the IP address sent by the dynamic domain name server 10, Send a request to join the group to the terminal device 20a corresponding to the queried IP address, wherein the request to join the group includes the domain name and IP address of the terminal device 20b that sends the request.

Step S706: After the group registration module 24a of the terminal device 20a receives the group joining request sent by the terminal device 20b, it analyzes the group joining request, and if the group joining request is accepted, the group registration module 24a of the terminal device 20a The module 24a returns a confirmation response to the terminal device 20b that sent the request to join the terminal device 20b into the group.

Step S707: When the input receiving module 22c of the terminal device 20c receives the user's input to call a terminal device 20a in the group, the terminal device 20c obtains the phone number of the called terminal device 20a input by the user through the input receiving module 22c , the IP address query module 23c will generate the corresponding domain name according to the predetermined rule as mentioned above with the obtained telephone number of the called terminal device 20a, and send a query request containing the generated domain name to the dynamic domain name server 10, and use To request the dynamic domain name server 10 to query the IP address corresponding to the called phone number.

Step S708: After receiving the query request sent by the terminal device 20c, the processing unit 12 of the dynamic domain name server 10 queries the IP address corresponding to the called terminal device 20a in the comparison table 11 and sends the IP address back to send the query The requesting terminal device 20c.

Step S709: When the input receiving module 22c of the terminal device 20c receives the user's input to call a terminal device 20a in the group, the signaling exchange module 25c receives the IP address of the called terminal device sent by the dynamic domain name server 10. After the address, an invitation message (invite) is sent to the IP address of the called terminal device 20a to request to establish a call.

Step S710: After the signaling exchange module 25a of the called terminal device 20a receives the invitation information, it rings and replies the ringing response to the calling terminal device 20c, and at the same time, it also sends a ringing response according to the group information stored in the storage module 26a. The domain name and IP address of the terminal device 20b of the user, sends an invitation message to the terminal device 20b in the group, and is used to notify other terminal devices in the group that the terminal device 20c requests to establish a call, wherein the called terminal device 20a initiates a call. The invitation information includes the identification information of the calling terminal device 20c.

Step S711: The signaling exchange module 25b of the terminal device 20b in the group rings after receiving the invitation message initiated by the called terminal device 20a and sends a ringing response (180ringing) to the called terminal device 20a to the called terminal Both the device 20a and the terminal devices 20b in its group display ringtones for incoming calls.

Step S712: Any one of the terminal devices 20a and 20b forming the group is for the user to answer the call so as to establish a call with the terminal device 20c.

Specifically, if the user answers the call through the called terminal device 20a during the call, the signaling switching module 25a of the called terminal device 20a sends a cancel message to the terminal device 20b in the group, and the callees in the group The signaling switching module 25b of the terminal device 20b cannot establish a call with the calling terminal device 20c after receiving the cancellation information. At the same time, the signaling exchange module 25a of the called terminal device 20a also sends a confirmation response (200ok) to the calling terminal device 20c, wherein the confirmation response includes the port information and IP address of the called terminal device 20a answering the call information and other identification information. After receiving the confirmation response, the signaling exchange module 25c of the calling terminal device 20c establishes a voice call with the called terminal device 20a according to the identification information in the confirmation response, that is, transmits voice streams to each other. After the call is completed, the signaling exchange module 25c of the calling terminal device 20c sends a hangup message (Bye) to the called terminal device 20a, and the calling terminal device 20c ends the signaling connection with the called terminal device 20a.

As shown in Figure 6, if the user answers the call through the terminal equipment 20b in the group of the called terminal equipment 20a during the call, the signaling switching module 25b of the terminal equipment 20b in the group sends the call to the called terminal equipment 20a sends a confirmation response, wherein the confirmation response includes identification information such as port information and IP address information of the terminal device 20b answering the call. The signaling exchange module 25a of the called terminal equipment 20a sends the confirmation response to the calling terminal equipment 20c, and after receiving the confirmation response, the signaling switching module 25c of the calling terminal equipment 20c, according to the identification in the confirmation response The information directly establishes a voice call with the terminal devices 20b in the group, that is, transmits voice streams to each other. After the call is completed, the signaling exchange module 25c of the calling terminal device 20c sends a hangup message (Bye) to the terminal device 20b, so that the calling terminal device 20c ends the signaling connection with the terminal device 20b.

Wherein, the voice communication method over Internet Protocol further includes a step: any terminal device 20 establishes a group in response to the user's operation received by the input receiving module 22 .

Claims (11)

1. A terminal device, which communicates with multiple other terminal devices and a dynamic domain name server in an Internet protocol voice system, the terminal device includes a registration module, which is used to generate a phone number according to a preset algorithm, and register the phone number Then generate the domain name corresponding to the phone number according to preset rules, and then register the domain name and the IP address corresponding to the terminal device with the dynamic domain name server, wherein the terminal device also includes: The input receiving module is used to receive the user's input operation to determine that when the user's operation needs to join a group, obtain the phone number corresponding to the terminal device as the founder of the group to be added; The IP address query module is used to generate a corresponding domain name according to the above-mentioned preset rules from the telephone number obtained by the input receiving module, and then generate a query request including the generated domain name and send the query request to a dynamic domain name server for Query the dynamic server for the IP address corresponding to the generated domain name; The group establishment and registration module is used to receive the user's input operation in the input receiving module, and when it is determined that the user's input operation needs to join a group, when receiving the domain name corresponding to the generated domain name sent by the dynamic domain name server After the IP address, generate a join group request and send the join group request to the terminal device corresponding to the queried IP address, wherein the join request includes the domain name and IP address of the terminal device that sent the join group request The group registration module is also used to join the group of the terminal device corresponding to the queried IP address after receiving the confirmation response returned by the terminal device corresponding to the queried IP address; A storage module, configured to store domain names and IP addresses of terminal devices joining the group; and Signaling switching module, when a terminal device outside the group calls the terminal device as a caller, the signaling switching module rings after receiving the invitation information sent from the calling terminal device and sends the ringing back to the calling terminal device Respond, and at the same time initiate invitation information to other terminal devices in the group according to the domain names and IP addresses of the terminal devices in the group stored by the storage module; ringing response. 2. The terminal device according to claim 1, wherein when the user answers the call through the terminal device, the signaling exchange module sends a cancellation message to the terminal devices in the group, and the terminals in the group The device cannot establish a call with the calling terminal device after receiving the cancellation information, and at the same time, the signaling exchange module sends a confirmation message to the calling terminal device, so that the calling terminal device exchanges the signaling with the calling terminal device after receiving the confirmation message. The modules transmit voice streams to each other to establish a call. 3. The terminal device according to claim 1, wherein when the user answers the call through other terminal devices in the group, the signaling exchange module receives the confirmation information sent by the terminal device that answers the call, and sends the The confirmation information is forwarded to the calling terminal device, so that the calling terminal device can establish a call with the terminal device answering the call in the group. 4. The terminal device according to claim 2 or 3, wherein the confirmation information includes identification information of the terminal device answering the call, and the identification information includes at least the IP address and port number of the terminal device sending the confirmation information . 5. A terminal device that communicates with a plurality of other terminal devices and a dynamic domain name server in an Internet protocol voice system, the terminal device includes a registration module for generating a phone number according to a preset algorithm, and registering the phone number Then generate the domain name corresponding to the phone number according to preset rules, and then register the domain name and the IP address corresponding to the terminal device with the dynamic domain name server, wherein the terminal device also includes: The input receiving module is used to receive the user's input operation; The group establishment registration module is used to establish a group in response to the user's input operation received by the input receiving module, and when receiving a request to join a group sent by another terminal device in the network protocol voice system, analyze the received The request to join the group, and confirm whether to agree to the request to join the group according to the user's input operation. If the input receiving module receives the user's input as an order to reject the request to join the group, the group registration module will The command sends back a rejection message to the terminal device that sent the request to join the group and rejects the other terminal devices to join the group; returning a confirmation message to add the other terminal device to the group; and The signaling switching module, when a terminal device outside the group acts as a caller to call other terminal devices in the group where the terminal device is located, the signaling switching module receives the invitation message initiated by the called terminal device, then rings and A ringing response is sent to the called terminal device. 6. The terminal device according to claim 5, wherein when the user answers the call through the called terminal device, the signaling exchange module receives the cancellation information sent by the called terminal device, and does not communicate with the calling terminal device Establish a call. 7. The terminal device according to claim 5, wherein when the user answers the call through the terminal device, the signaling exchange module sends a confirmation response to the called terminal device in the group, wherein the confirmation response contains the identification information of the terminal device, so that the called terminal forwards the confirmation information to the calling terminal device, and the calling terminal device directly establishes a call with the terminal device. 8. A voice over network protocol communication method, used in a voice over network protocol system, the voice over network protocol includes a dynamic domain name server and a plurality of terminal devices that access the dynamic domain name server, it is characterized in that the method comprises steps: Multiple terminal devices generate their own phone numbers and generate the domain names corresponding to their own phone numbers according to preset rules; Each terminal device registers its own domain name and its own IP address with the dynamic domain name server; When a first terminal device among the plurality of registered terminal devices responds to the user's input operation and wants to join a group established by a second terminal device, the first terminal device obtains the phone number of the second terminal device, and The obtained phone number generates a corresponding domain name through the above preset rules, and sends a query request containing the generated domain name to the dynamic domain name server, for requesting the dynamic domain name server to query the IP address corresponding to the generated domain name; After receiving the query request sent by the first terminal device, the dynamic domain name server queries the IP address corresponding to the domain name contained in the query request and sends the queried IP address to the first terminal device; After receiving the IP address sent by the dynamic domain name server, the first terminal device sends a request to join the group to the second terminal device corresponding to the IP address sent by the dynamic domain name server; After receiving the request to join the group, the second terminal device analyzes the request to join the group and confirms whether the first terminal device agrees to join according to the user's input. When the first terminal device joins the group, the second terminal device stores the domain name and IP address of the first terminal device and returns a confirmation response to the first terminal device to join the first terminal device into the group; and If the third terminal device as the calling party cancels the call during the call, the third terminal device sends a hangup message to the second terminal device as the called party, and after receiving the hangup message, the second terminal device The cancellation information is sent to the first terminal device in the group, and the whole call process ends. 9. voice over network protocol method as claimed in claim 8 is characterized in that, the method also comprises: After the first terminal device joins the group where the second terminal device belongs, when a terminal device outside the group serves as the calling party to call the second terminal device in the group, if the user passes the second terminal device during the call When the device answers the call, the second terminal device sends a cancel message to the first terminal device in the group, and the first terminal device in the group cancels the establishment of the call with the third terminal device after receiving the cancel message, and at the same time the The second terminal device also sends a confirmation response to the third terminal device, wherein the confirmation response includes identification information identifying the second terminal device, and the third terminal device establishes a voice call with the second terminal device after receiving the confirmation response ; If the first terminal in the group answers the call during the calling process, the first terminal device sends a confirmation response to the second terminal device, wherein the confirmation response includes identification information identifying the first terminal device, The second terminal sends the confirmation response to the calling third terminal device, and after receiving the confirmation response, the third terminal device establishes a conversation with the first terminal according to the identification information in the confirmation response. 10. The method for voice over network protocol communication according to claim 9, wherein the confirmation response includes identification information of the terminal equipment that answers the call, wherein the identification information includes port information, an IP address, and the calling party The third terminal device establishes a voice call with the terminal device answering the call according to the identification information in the confirmation response. 11. The voice communication method over Internet protocol according to claim 8, wherein any terminal device establishes a group in response to a user's input operation.