JP2003324487A - System and method for processing network telephone transmission packet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system and a method for processing a network telephone transmission packet. <P>SOLUTION: A voice server is provided for registering a network telephone, a real location of a network on which the network telephone call is distributed is recorded, and a connected call is made possible smoothly between network telephones. Additionally, a voice service server records a real network location and when the network telephone generates a registered packet and imparts it to the voice service server and when the network telephone calls the other network telephone, according to the TCP, the network telephone transmits a calling packet attached with a telephone number of the other network telephone. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network telephone transmission packet processing system and method, and the network telephone is, for example, an independent network telephone or a computer network telephone for transmitting voice through a computer. Refers to the Internet.

[0002]

2. Description of the Related Art Due to the development and cost reduction of the Internet, applications for achieving voice communication using the Internet have been continuously developed, and simple and convenient Internet telephones have been developed and the VoIP protocol has been established. The H232 protocol is used.

The existing voice protocol originally meets the communication demands of the Internet telephone, but the development of the Internet is beyond imagination, and therefore, it is used in the quantity of the originally standardized real address (or real Internet IP). The application of virtual internet IP (or virtual internet IP) has spread, for example, if there are ten online computers or network telephones inside a company, that is, one computer or network each. The phone is assigned one virtual address, but there are only three real addresses actually assigned to this company. It is the network address converter (Network Ad) that dynamically distributes the real address to the computer or network telephone.
address translation (NAT), which distributes and records to which virtual address the network address translator distributes the real address.

When the network address translator was initially designed, a voice packet was used.
Transmission problems are not taken into account, which means that currently standard network address translators are able to accurately and correctly transmit general data packets, but they are in the current voice protocol and do not Can not be transmitted to. This will be described with reference to FIG.

FIG. 1 shows network telephone A, network address translator B, H232 server C, network address translator D, and network telephone E. Further, the above-mentioned devices each include a network address and are referred to as IPA, IPB, IPC, IPD, and IPE, respectively. Among them, the H232 server C is a server that complies with the H232 protocol, and the network telephone A
And establish a connection of network telephone E. In addition, the network address translator B undertakes the real address distribution of the network telephone A, and the network address translator D undertakes the real address distribution of the network telephone E.

The cause of a call failure that may occur when the network telephone A plans a call with the network telephone B and has the network address translators B and D will be briefly described below.

Steps S11 to S14 are registration steps that occur online in the network telephone E, where the network telephone E originally has a virtual address (IPE), the network telephone E comes online, and the network telephone E first sends a registration packet. To the network address translator D, which distributes the real address IPD to the network telephone E, whereby the network address translator D records that the real address IPD has been distributed to the virtual address IPE (step S11). In the registration packet received by the H232 server C according to the H232 protocol, the real address IPD may be in the third layer of the registration packet and the virtual address IPE may be in the first layer of the registration packet. Depending on the H232 protocol, H232
Server C can only open the first layer of the registration packet, so that in step S12 H232 server C can call network telephone E's telephone number (eg 8226).
-12345678) and the corresponding virtual address IPE of the telephone number. After completion of step S12, the H232 server C sends a registration response packet to the network address translator D (step S13), and the network address translator D further transmits this registration response packet to the network telephone E (step S1).
4).

Steps S15 to S17 are registration steps that occur when the network telephone A is online, and since the flow is the same as steps S11 to S14, duplicate description will be omitted. Naturally, step S
16, the H232 server C records the telephone number (for example, 8226-00001111) of the network telephone A and the virtual address IPA corresponding to the telephone number.

When network telephone A actively tries to contact network telephone E, the user of network telephone A uses the telephone number of network telephone E (ie 8226).
Dial 1234555678). At this time, the network telephone A transmits the network location search packet of the network telephone E (step S19), the network address translator B transmits the network location search packet of the network telephone E to the H232 server C, and the H232 server C transmits the network. The telephone number of the telephone E is used to find the last registered address of the network telephone E, that is, the virtual address IPE (step S20). The H232 server C finally transmits the search response packet to the network address translator B (step S22), that is, the network telephone A finally obtains the virtual address IPE of the network telephone E.

On the basis of the ITU-H323 protocol, it should be noted that the network telephone A uses the step S1.
5 and the packet agreement generated in step S19 is UDP
(User Datagram Protocol), that is, a non-connection protocol, and similarly, the agreement of the packet generated by the network telephone E in step S11 is also UDP.

After the network telephone A finally acquires the virtual address IPE of the network telephone E, that is, the one transmitted to the destination is the network telephone E call packet of the address IPE (step S23), and the network address translator B transmits the packet. Further, the network telephone E call packet is transmitted to the H232 server C, and H232
The server C receives the network telephone E call packet, that is, plans connection with the address IPE, but since the address IPE is a virtual address and not a real address, the H232 server C cannot process it, and therefore the network telephone A is called. Connection of network phone E cannot be achieved.

At present, the use of network address translation within a company is very popular, or the use of a firewall having a network address translation function is also very popular within a company. A device having one or multiple layers of network address conversion function is installed to provide real addresses with few resources to as many different companies or individuals as possible, but this does not allow the network telephone to operate smoothly. Someone has already improved the current voice protocol to a solution, or replaced an existing network address translator or firewall, but such a solution would result in a large amount of hardware equipment replacement. , So it was difficult to solve the problem.

[0013]

SUMMARY OF THE INVENTION The main object of the present invention is to enable two network telephones located in different areas to communicate smoothly even if a device having a network address conversion function is installed inside or outside the company. To do so.

Another main object of the present invention is to make it possible to achieve a smooth network telephone call at a low cost on the assumption that the device having the original network address translation function is not replaced.

[0015]

SUMMARY OF THE INVENTION The invention of claim 1 is a method of network telephony packet processing utilizing connection to a voice server on a network, said voice server using this method for a first network. You can connect the telephone and the second network telephone to make a call,
The first network telephone is connected to the network through the device having the first network address translation function, and the first network telephone has the first telephone number and the first network virtual address, and the first When the network telephone connects to the network, the device having the first network address translation function dynamically distributes the first network real address to the first network telephone, and the second network phone the device having the second network address translation function. Through the network and connect to the network, and the second network telephone is the second
When the second network telephone has a telephone number and a second network virtual address, and the second network telephone connects to the network, the device having the second network address conversion function dynamically distributes the second network real address to the second network telephone. The method comprises the steps of receiving a registration packet of a first network telephone, the data of the registration packet including a first telephone number and a first network real address of the first network telephone, the first network. Obtaining and storing the first telephone number and the first network real address of the telephone, and establishing the correspondence between the first telephone number and the first network real address, receiving a registration packet of the second network telephone, of which this registration Packet packet Others step including the telephone number and the second network real address of the second network telephone,
Obtaining and storing a second telephone number and a second network real address of the second network telephone, and establishing a correspondence between the second telephone number and the second network real address, the first network telephone making the second network telephone Receiving a calling packet for calling, wherein the calling packet includes a second telephone number of a second network telephone, searching for a second network real address corresponding to the second telephone number, and calling the second telephone number calling packet for the second network Network telephone transmission, comprising: transmitting to a real address, receiving a second telephone number response packet, transmitting a response packet relating to a second telephone number to a first network real address For packet processing It is set to. The invention of claim 2 is
The method according to claim 1, wherein the network is the Internet. The invention of claim 3 is the same as claim 2
In the method of processing a network telephone transmission packet according to [1], the network is the Internet, and the registration packets of the first and second network telephones each have seven layers, of which the first network real address is in the registration packet of the first network telephone. In the third layer, and the second network real address is in the third layer in the registration packet of the second network telephone. Claim 4
Of the invention, in a voice server, the voice server processes a network telephone transmission packet to enable a first network telephone to make a concatenated call with a second network telephone, wherein the first network telephone has a first network address translation function. A first network address when the first network telephone has a first telephone number and a first network virtual address, and the first network telephone connects to the network. The device having the translation function dynamically distributes the first network real address to the first network telephone, the second network phone passes through the device having the second network address translation function to connect to the network, and the second network telephone. Is the second phone number A beauty second network virtual address, and of which when the second network telephone is connected to the network, the second device having a second network address translation function to the second network telephone
Dynamic distribution of the network real address, and the voice server performing the following steps to enable the first network telephone to connect and talk with the second network telephone, that is, to receive the registration packet of the first network telephone, Among them, the step of the registration packet data including the first telephone number and the first network real address of the first network telephone, acquiring and storing the first telephone number and the first network real address of the first network telephone, and the first Step of establishing correspondence between telephone number and first network real address, second
A step of receiving a registration packet of a network telephone, the data of the registration packet including the telephone number and the second network real address of the second network telephone, obtaining the second telephone number and the second network real address of the second network telephone, and Storing and establishing a correspondence between the second telephone number and the second network real address, the first network telephone receiving a call packet calling the second network telephone,
The calling packet is the second one of the second network telephone
A step including a telephone number, a second telephone number corresponding to the second
Step 2 for searching network real addresses
Transmitting the telephone number calling packet to the second network real address, receiving the second telephone number response packet, transmitting the response packet relating to the second telephone number to the first network real address, And a method for processing a network telephone transmission packet. The invention of claim 5 provides the voice server according to claim 4, wherein the network is the Internet. According to a sixth aspect of the present invention, in the voice server according to the fifth aspect, the network is the Internet, and the registration packets of the first and second network telephones each have seven layers, of which the first network real address is the first.
The voice server is in the third layer in the registration packet of the network telephone, and the second network real address is in the third layer in the registration packet of the second network telephone. According to the invention of claim 7, when the network telephone gives the registration packet to the voice server, it depends on TCP, and when the network telephone calls another network telephone, this network telephone depends on TCP and the telephone number of the other network telephone. Characterized by transmitting a call packet accompanied by
A voice server network telephone set forth in claim 5.

[0016]

In order to achieve the above object, the present invention provides a voice server different from a traditional server (for example, a server complying with the H232 protocol), and the voice server of the present invention is used for registering a network telephone. It is possible to record the actual location (real address) of the network provided and served by the network telephone so that a smooth concatenated call between the network telephones can be performed. In addition, the voice server can record the actual network actual position, rely on TCP when the network phone generates and sends a registration packet to the voice server, and when the network phone calls another network phone, A network telephone relies on TCP to send a call packet having the telephone number of another network telephone.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 is a structural diagram of a use environment of the present invention. For example, computers 31, 32, 33 owned by a company
And the network telephones P, P1 and P2 all pass through the network address translator Q and the Internet 90.
Can be connected to. Computers 61, 62 and 63 owned by another company, and network telephones T and T1 can all pass through the network address translator S and be connected to the Internet 90. One voice server R provides a voice service. The point of the present invention lies in the difference in processing function of the voice server R, provided that the network address translator Q and the network address translator S are traditional network address translators, for example, using the H232 protocol.

The flow of connection when the network telephone P actively tries to contact the network telephone T will be described below. Please refer to FIG. 3 below.

FIG. 3 shows a network telephone P, a network address translator Q, a voice server R, a network address translator S and a network telephone T, and the above devices each have a network address,
They are respectively IPP, IPQ, IPR, IPS and IPT. Among them, the voice server R is H23
It is a server that does not comply with the two protocols, and in the present embodiment, it is a slightly modified server of the H232 protocol and is used to establish the connection between the network telephone P and the network telephone T. In addition, the network address translator Q undertakes the real address distribution of the network telephone P, and the network address translator S undertakes the real address distribution of the network telephone T.

Steps S31 to S34 are registration steps that occur on the network online of the network telephone T. The network telephone T originally has a virtual address (IPT), the network telephone T is online to the network, and the network telephone T is the first. A registration packet is sent to the network address translator S, and the network address translator S sends the real address I
The PS is distributed to the network telephone T, whereby the network address translator S records that the real address IPS is distributed to the virtual address IPT (step S31). Then, the registration packet is transmitted to the voice server R (step S32). In the registration packet received by the voice server R according to the H232 protocol, the real address IPS is in the third layer of the registration packet and the virtual address IPT is in the first layer of the registration packet. According to the improved protocol of the invention, the voice server R opens the third layer of the registration packet, and in step S32 the voice server R makes the telephone number of the network telephone T (eg 8336-12345678) and the corresponding real number of the telephone number. Record the address IPS. After completion of step S32, the voice server R sends a registration response packet to the network address translator S (step S33), and the network address translator S further transmits this registration response packet to the network telephone T (step S34).

Steps S35 to S17 are registration steps that occur when the network telephone P is online, and since the flow is the same as steps S31 to S34, duplicate description will be omitted. Naturally, step S
36, the telephone number of the voice server R network telephone P (for example, 8336-00001111) and the real address IPQ corresponding to the telephone number are recorded.

It should be noted that the protocol of the packet generated by the network telephone P in step S35 is TCP (Transmission Control).
Protocol), that is, the connection-oriented transmission layer agreement for data transmission is narrowed down, and similarly, the packet protocol generated by the network telephone T in step S31 is also TCP.
Is to be.

When the network telephone P actively tries to contact the network telephone T, the user of the network telephone P can call the telephone number of the network telephone T (ie 8336).
Dial 1234555678). At this time, the network telephone P transmits the network telephone T calling packet by TCP (step S39), the network address translator Q transmits the network telephone T calling packet to the voice server R, and the voice server R transmits the network telephone T's packet. Address of the last registration of the network telephone T using the telephone number, that is, real address IPS
(Step S40). Due to the TCP relationship,
The network telephone T-call packet is then transmitted to the network address translator S (step S41), which records that the real address IPS has been distributed to the virtual address IPT,
As a result, the network telephone T calling packet is sent back to the network telephone T (step S42).

In the subsequent step, the network telephone T transmits a network telephone T response packet to the network address translator S (step S43), and the network address translator S further transmits a network telephone T response packet to the voice server R. (Step S4
4) The voice server R further transmits the network telephone T response packet to the network address translator Q (step S45), and the network address translator Q registers that the real address IPQ is distributed to the virtual address IPP, and Network phone by
The response packet is transmitted to the network telephone P (step S46).

Through the above steps, even if a device having a network address conversion function, such as a network address conversion function or a firewall having a network address conversion function, is installed inside or outside the company, the network telephone can operate smoothly.

[0026]

As a whole, the present invention has its object, means, and
Any of the functions is different from the characteristics of the well-known technology, and is a major breakthrough in network telephone applications. It should be noted that the above examples are for explaining the present invention and do not limit the scope of the present invention, and any modifications or alterations in details that can be made based on the present invention are within the scope of the present invention. Shall belong to.

[Brief description of drawings]

FIG. 1 is a flowchart for connecting two known network telephones.

FIG. 2 is a structural diagram of a use environment of the present invention.

FIG. 3 is a flow chart of connecting two network telephones according to the present invention.

[Explanation of symbols]

A, E, P, P1, P2, T, T1 network telephone B, D, Q, S network address translator CH232 server R voice server 31-33, 61-63 Computer 90 Internet

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] June 4, 2002 (2002.6.4)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

The existing voice protocols originally meet the communication demands of Internet telephony, but the development of the Internet is beyond imagination, and for this reason the number of real addresses (or real Internet IPs) originally defined is therefore large. Then, it becomes too late to use, and the application of virtual address (or virtual Internet IP) becomes widespread. For example, if there are ten online computers or network telephones inside a company , one computer or network is available. The phone is assigned one virtual address, but there are only three real addresses actually assigned to this company. It is the network address translator (Network Addr) that dynamically distributes the real address to the computer or network telephone.
Ess Translation (NAT), which distributes and records to which virtual address the network address translator distributes the real address.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction content]

The cause of a call failure that may occur when the network telephone A plans a call with the network telephone E and has the network address translators B and D will be briefly described below.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

On the basis of the ITU-H 232 protocol, it should be noted that the network telephone A has step S1.
5 and the packet agreement generated in step S19 is UDP
(User Datagram Protocol), that is, a non-connection protocol, and similarly, the agreement of the packet generated by the network telephone E in step S11 is also UDP.

Claims (7)

[Claims] 1. A method of processing a network telephone transport packet, comprising utilizing a connection to a voice server on a network, the voice server using the method first.
The network telephone and the second network telephone can be connected to each other to make a call, of which the first network telephone is connected to the network through the device having the first network address translation function.
And the first network telephone has a first telephone number and a first network virtual address, and first of which
When the network telephone connects to the network, the first
The device having the network address translation function dynamically distributes the first network real address to the first network telephone, and the second network phone passes through the device having the second network address translation function to connect to the network.
And the second network telephone has a second telephone number and a second network virtual address, and of which the second
Second, when the network phone connects to the network
The device having the network address translation function dynamically distributes the second network real address to the second network telephone, and the method comprises the following steps: receiving the registration packet of the first network telephone, of which the data of the registration packet is received. Includes a first telephone number and a first network real address of the first network telephone, obtaining and storing the first telephone number and the first network real address of the first network telephone, and the first telephone number and the first network Establishing a correspondence of real addresses, receiving a registration packet of a second network telephone, and the data of this registration packet includes the telephone number of the second network telephone and the second network real address, the second of the second network telephone 2 phone numbers And obtaining and storing the second network real address and establishing the correspondence between the second telephone number and the second network real address, the first network telephone receives a call packet for calling the second network telephone, and the call packet Including a second telephone number of the second network telephone, searching for a second network real address to which the second telephone number corresponds, transmitting a second telephone number calling packet to the second network real address, second A method of processing a network telephone transmission packet, comprising: receiving a telephone number response packet; transmitting a response packet relating to a second telephone number to a first network real address; 2. The method of network telephony packet processing according to claim 1, wherein the network is the Internet. 3. The method of processing a network telephone transmission packet according to claim 2, wherein the network is the Internet, and the registration packets of the first and second network telephones each have seven layers, of which the first network real address is It is on the third layer in the registration packet of the first network telephone, and the second network real address is the second.
A method of processing a network telephone transmission packet, characterized in that it is in the third layer in the registration packet of the network telephone. 4. In the voice server, the voice server processes the network telephone transmission packet to enable the first network telephone to concatenate with the second network telephone, wherein the first network telephone has the first network address translation. Connects to the network through a device with functions,
And the first network telephone has a first telephone number and a first network virtual address, and first of which
When the network telephone connects to the network, the first
The device having the network address translation function dynamically distributes the first network real address to the first network telephone, and the second network phone passes through the device having the second network address translation function to connect to the network.
And the second network telephone has a second telephone number and a second network virtual address, and of which the second
Second, when the network phone connects to the network
The device having the network address translation function dynamically distributes the second network real address to the second network telephone, and the voice server performs the following steps.
The first network telephone is connected to the second network telephone,
Enabling a call, i.e. receiving a registration packet of the first network telephone, wherein the data of the registration packet includes the first telephone number and the first network real address of the first network telephone, the first network telephone first A step of obtaining and storing the first telephone number and the first network real address, and establishing a correspondence relationship between the first telephone number and the first network real address, receiving a registration packet of the second network telephone, of which data of the registration packet Including the telephone number and the second network real address of the second network telephone, obtaining and storing the second telephone number and the second network real address of the second network telephone, and the second telephone number and the second network real address. Correspondence of Erection, the first network telephone receives a call packet calling the second network telephone, the call packet including the second telephone number of the second network telephone, the second network number corresponding to the second network real address. Searching, transmitting a second telephone number calling packet to a second network real address, receiving a second telephone number response packet, transmitting a response packet relating to a second telephone number to the first network real address A method of processing a network telephone transmission packet, comprising the following steps: 5. The voice server according to claim 4, wherein the network is the Internet. 6. The voice server according to claim 5, wherein the network is the Internet, and the registration packets of the first and second network telephones both have seven layers, of which the first network real address is the first network telephone. A voice server, characterized in that it is in the third layer in the registration packet and the second network real address is in the third layer in the registration packet of the second network telephone. 7. Relying on TCP when a network telephone provides a registration packet to a voice server, and when one network telephone calls another network telephone,
The network telephone of the voice server according to claim 5, wherein the network telephone transmits a call packet accompanied by a telephone number of another network telephone by using TCP.