JP2003110595A - Ip address notifying method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate necessity to prepare a server dedicated for acquiring an IP (internet protocol) address inside an IP network. SOLUTION: As equipment to be connected to an IP network 1, equipment having a UUI (user user interface) interface part connected through a D channel to an ISDN telephone network 5 and an IP network access part connected through a B channel to the IP network 1 is to be used. Call originating user side equipment 3-1 acquires a present IP address by requesting it to providers 2-1 and 2-2 and that IP address is reported through the UUI interface part and the ISDN telephone network 5 to call incoming user side equipment 3-2. Besides, the call incoming user side equipment 3-2 acquires the IP address of the call originating user side equipment 3-1 notified from the call originating user side equipment 3-1, and the present IP address acquired from the provider 2-2 is notified through the IP network 1 to the equipment of that IP address.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an IP (internet pr
otocol) Regarding an address notification method, in particular, an IP address is acquired by notifying the IP address of an IP connected device connected to an information network such as the Internet (hereinafter referred to as an IP network) using the ISDN telephone network. The present invention relates to an IP address notifying method that eliminates the need to prepare a dedicated server for the purpose in the IP network.

[0002]

2. Description of the Related Art When exchanging information between IP-connected devices connected to an IP network, it is necessary to acquire the IP address of the other device. The IP address is a limited number of resources, so in order to use it effectively, an address block is assigned to each provider (Internet operator), and each user device has its own IP address. It is widely practiced to allocate it. The IP of the partner device dynamically assigned in this way
In order to obtain the address, conventionally, a server having a fixed address is prepared in the IP network, and the IP address dynamically assigned to each connected device is registered in the server for each connected device. When exchanging information, the server is accessed and the IP address of the partner device is acquired from the registered contents.

FIG. 4 is an explanatory diagram showing a conventional IP address acquisition method. A server 12 having a fixed address is prepared in the IP network 1. This server 12 is a gatekeeper (ITU-T standard (H.323)) or SI.
It is called the P server (RFC technical specification (2543)). When each user starts the own device 3-1, 3-2, ... And connects to the IP network 1, the DHCP (dynamic host con
figuration protocol; IETF specifications (RFC2131, RFC213
2)) at that time an IP address is assigned by the provider, which is the RAS control protocol (ITU).
-T standard (H.225)) or SIP protocol is registered in the server 12 corresponding to the device. This registration is normally performed when the device is started up, but may be performed at regular time intervals in a device having an automatic acquisition mode.

Calling user side and destination user side equipment 3-
When exchanging information between 1 and 3-2, the calling user accesses the server 12 having a fixed IP address, and based on the fixed ID of the called user, the IP of the called user side device 3-2. Query and get the address. Also,
The called user knows the fixed ID of the calling user based on the information transmitted from the calling user device 3-1 and accesses the server 12 in the same manner, and the called user device 3-1.
Inquires about and acquires the IP address of In this way, the calling user side device 3-1 and the destination user side device 3-1 and 3-2, after acquiring each other's IP addresses, exchange (call) information such as voice information.

[0005]

As described above, conventionally, a dedicated server is provided in the IP network in order to obtain an IP address required for exchanging information between devices connected to the IP network. However, there is a problem in that it is expensive and troublesome to install and manage. In addition, since access for all users who want to acquire an IP address is concentrated on a dedicated server, the server must have sufficient reliability and security. First, since traffic in the IP network may be concentrated, there is also a problem that management and operation corresponding to it may be necessary.

According to the present invention, a device connected to an IP network can notify the partner device of the IP address of the own device and can also acquire the IP address of the partner device. Therefore, in order to acquire the IP address. Dedicated server for IP
An object of the present invention is to provide an IP address notification method that does not need to be prepared in the network, does not cause a problem of traffic concentration, and can be easily applied to devices corresponding to various IP network services and contents. It is what

[0007]

In order to solve the above problems, the present invention provides a UUI (user u) connected to an ISDN telephone network by a D channel as a device connected to an IP network.
ser information) interface unit and a device having an IP network access unit connected to the IP network by the B channel, and the calling user side device sends its own IP address to the called user via the UUI interface unit and the ISDN telephone network. The first feature is in notifying the side device. Further, in the present invention, the destination user side device acquires the IP address notified from the source user side device via the UUI interface unit and notifies the source user side device of its own IP address via the IP network. Has a second feature. Furthermore, the present invention provides at least one of the devices connected to the IP network.
The third feature is that it is connected to the IP network in the connection form of the always-connected IP connection service.

According to the first feature, it is not necessary to prepare a dedicated server in the IP network in order to obtain the IP address, and the connected device connected to the IP network uses the IP address of its own device as the partner device. Can be notified, and a problem of traffic concentration does not occur, so a stable connection can be expected. Further, according to the second feature, it is not necessary to prepare a dedicated server in the IP network for acquiring the IP address, and the connected devices connected to the IP network can mutually communicate with each other's IP address. The device can be notified. Furthermore, according to the third feature, information can be exchanged between connected devices at low cost simply by adding a transmission fee for user / user information.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a functional configuration diagram showing an example of a connection form of an IP network and an ISDN telephone network to which the present invention is applied.

A plurality of providers 2-1 and 2 are provided in the IP network 1.
-2, ... are connected to each user device 3-1,
3-2, ... are these providers 2-1, 2-2 ,.
. And the exchange 4-1, 4-2 ,.
Connected to. Address blocks are assigned to the providers 2-1, 2-2, ..., And the IP addresses of the user devices 3-1, 3-2 ,. ··· Dynamically assigned by

ISD is provided between the exchanges 4-1, 4-2, ...
There are N telephone networks 5. In the case of the ISDN line, each user can use two B channels (information channel) and one D channel (signal channel). Each user equipment uses one of these B channels as a normal ISDN line, and uses the remaining one B channel for exchanging information such as voice information via the IP network. The D channel is used for exchanging user-user information (hereinafter referred to as UUI information, TTC standard (JT-1257)).

FIG. 2 is a functional block diagram of an IP telephone 3-1 (3-2) which is a specific example of user equipment used in the present invention. This IP telephone 3-1 (3-2) is
UUI interface unit 6, IP network access unit 7, IS
DN interface unit 8, DSU (Digital Service Unit) for connecting a user terminal to a digital communication network
9, a voice conversion unit 10 and a control unit 11, and a handset, a microphone, a speaker, etc. are connected to the voice conversion unit 10.

The UUI interface section 6 is for exchanging UUI information through the ISDN telephone network 5 using the D channel, and has the ISDN interface section 8, the DSU 9 and the switching center 4-1 (4 in FIG. 1). -2) is connected to the ISDN telephone network 5. The IP network access unit 7 is for exchanging information such as voice information via the IP network 1 using one B channel, and has an ISDN interface unit 8, a DSU 9, and a switching center 4.
-1 (4-2) and the provider 2-1 (2-2) are connected to the IP network 1.

The voice conversion unit 10 is a code / decoder (codec).
Converts voice from a microphone into voice packets. This voice packet is sent to the IP network access unit 7, I
SDN interface unit 8, DSU 9 and switching center 4-
1 (4-2) to the IP network 1. Also, I
The voice packet input via the P network 1 and the switching center 4-1 (4-2) is transmitted via the DSU 9, the ISDN interface unit 8 and the IP network access unit 7 to the voice conversion unit 10.
Is input to and output from the speaker or the like. The control circuit 11 controls each part of the IP telephone.

FIG. 3 is a flow chart showing an embodiment of the IP address notification method of the present invention. This embodiment uses the IP telephone 3-1 (3-2) shown in FIG. VoI for exchanging voice information via
The connection procedure of P (voice over IP; ITU-T recommendation (H.323)) is shown. In the figure, the left side portion and the right side portion respectively show the operation of the user and the operation of the device on the calling user side and the destination user side, and the central portion shows the IP network and ISD
It shows the flow of information in the N telephone network. In addition,
The exchange is omitted in FIG.

A specific example of the procedure of the IP address notification method of the present invention will be described below with reference to FIGS. 2 and 3.

When exchanging voice information via the IP network 1, first, the calling user inputs the telephone number of the called user from the IP telephone 3-1 to make a call (). Subsequent operations are automatically performed by the devices constituting the entire system. The calling user side IP telephone 3-1 requests its own IP address from the provider 2-1 connected to the IP network 1 and acquires it (). Request for this IP address,
For example, DHCP (dynamic host configuration)
protocol; IETF specifications (RFC2131, RFC2132)). The calling user's IP telephone 3-
1 may receive the IP connection service of constant connection by the provider 2-1.

Next, the calling user side IP telephone 3-1
The IP address of the own device acquired from the provider 2-1 is included in the UUI information, and the UUI information is sent via the D channel to the UUI interface unit 6, ISDN interface unit 8, DSU 9, switching center 4-1 and ISDN telephone network 5.
Destination user side IP telephone 3 specified by telephone number via
-2 to send ().

The destination user's IP telephone 3-2 receives the UUI information sent from the calling user's IP telephone 3-1 via the ISDN telephone network 5 and the switching center 4-2 in the DSU 9,
It is received by the ISDN interface unit 8 and the UUI information interface unit 6. Since the received UUI information includes the IP address of the calling user side IP telephone 3-1, the destination user side IP telephone 3-2 can acquire the IP address of the calling user side IP telephone 3-1. (). As a result, the calling user side IP telephone 3-1
Is notified to the destination user side IP telephone 3-2.

Next, the IP telephone 3-2 of the called user side
Own IP to the provider 2-2 connected to the P network 1
Request an address and get it (). The request and acquisition of this IP address is the same as the calling user side, for example, D
It can be done by HCP. Also, the receiving user side I
The P telephone 3-2 may also receive the IP connection service of constant connection by the provider 2-2.

Next, the destination user side IP telephone 3-2
The IP address of the own device acquired from the provider 2-2 is used as the IP network access unit 7, ISDN interface unit 8, D
It is transmitted to the calling user side IP telephone 3-1 via the SU 9, the switching center 4-2, the provider 2-2 and the IP network 1 (). This transmission is performed by transmitting the IP address of the own device acquired from the provider 2-2 to the IP address acquired from the UUI information from the calling user side IP telephone 3-1.

The originating user side IP telephone 3-1 is connected to the destination user side IP telephone 3-2 from the IP network 1 to the provider 2-1.
And the IP address sent via the switching center 4-1 to the DSU 9, the ISDN interface unit 8 and the UUI.
Received by the information interface section 6 and received user side IP
The IP address of the telephone 3-2 is acquired ().

According to the above procedure, the IP telephones 3-1 and 3-2 on the calling user side and the called user side can notify each other of their own IP addresses and acquire the IP addresses of the counterpart devices. Enter the telephone call procedure.

The call procedure of this IP telephone is, for example, ITU.
-T recommendations (H.225, H.245, H.323) may be followed, an example of which is shown in the lower part of FIG. That is, the originating user side and the destination user side IP telephones 3-1, 3-2
Is based on the IP address obtained respectively.
-1, 4-2, providers 2-1, 2-2 and the IP network 1 to perform call control including call signaling, channel opening and admission request (ITU-T recommendation (H.225)), and then In addition, by performing control (ITU-T recommendation (H.245)) including establishment of a communication control channel and exchange of capability information, a call involving voice encoding / decoding (ITU-T recommendation (H.323, G711 , G729))).

[0025]

As is apparent from the above description, according to the invention of claim 1, it is not necessary to prepare a dedicated server in the IP network for acquiring the IP address, and the server is connected to the IP network. The connected device alone can notify the other device of the IP address of its own device, and since no traffic problem occurs, stable connection can be expected. Further, according to the invention of claim 2, it is not necessary to prepare a dedicated server in the IP network to acquire the IP address, and the connected devices connected to the IP network mutually provide their own IP addresses. The other device can be notified. According to the third aspect of the invention, information can be exchanged between the connected devices at low cost simply by adding the UUI transmission fee.

Further, according to the present invention, as in a normal call, simply inputting the telephone number of the other party will
Information can be exchanged between P-connected devices, and there is no need to be aware of IP addresses or URLs that are difficult to understand, so the devices can be used easily. In addition, VoIP for each user
It is easy to handle because there is no need to set up a server or VoIP network, and there is no need to rely on content that involves updates and changes in service content, making it easy to handle devices that support various IP network services and content. Can be applied.

[Brief description of drawings]

FIG. 1 is a functional configuration diagram showing an example of a connection form of an IP network and an ISDN telephone network to which the present invention is applied.

FIG. 2 is a functional block diagram of an IP telephone which is a specific example of user equipment used in the present invention.

FIG. 3 is a flowchart showing an embodiment of an IP address notification method of the present invention.

FIG. 4 is an explanatory diagram showing a conventional IP address acquisition method.

[Explanation of symbols]

1 ... IP network, 2-1, 2-2 ... Provider, 3-1,
3-2 ... User equipment, 4-1, 4-2 ... Exchange station, 5 ...
・ ISDN telephone network, 6 ... UUI interface, 7 ...
・ IP network access unit, 8 ... ISDN interface unit,
9 ... DSU, 10 ... voice conversion unit, 11 ... control unit, 1
2 ... server

Claims (3)

[Claims] 1. An IP address notifying method for notifying an IP address when transmitting information between devices connected to an IP network, wherein a UUI connected to an ISDN telephone network by a D channel is used as a device connected to the IP network. A device having an interface section and an IP network access section connected to the IP network by a B channel is used, and the calling user side apparatus sets its own IP address to the called user via the UUI interface section and the ISDN telephone network. A method of notifying an IP address, characterized by notifying a side device. 2. The destination user side device acquires an IP address notified from the source user side device via a UUI interface unit, and sends the IP address of the destination user side device to the source user side device of the IP address via the IP network. The IP address notifying method according to claim 1, wherein the IP address is notified. 3. The apparatus according to claim 1, wherein at least one of the devices connected to the IP network is connected to the IP network in a connection form of an always-connected IP connection service. IP address notification method.