JP6995365B2 - How to perform peer-to-peer communication by IPv6 via NGN - Google Patents

Description

The present invention relates to a method for performing peer-to-peer communication by IPv6 via NGN (Next Generation Network).
Here, IP is an abbreviation for Internet Protocol, which is a convention that defines the method of data communication on the Internet, and IPv6 is an abbreviation for Internet Protocol version 6 (hereinafter referred to as). Similarly).

In recent years, in Japan, the backbone communication network is shifting from the public switched telephone network (PSTN) to the next generation network (NGN) using IP communication technology.

NGN is a network that has the same security as the circuit switching method used in PSTN, the convenience of the method of designating a communication line using a telephone number as the caller ID (identification number), and the economic efficiency of the IP method. ..
In NGN, safe and high-quality services are provided by managing the telephone numbers assigned to each communication line connected to this on the network side and taking security measures such as blocking unauthorized access at the entrance of the network. offer.
In addition, according to NGN, it is possible to provide services that combine voice communication with data communication and services that combine telephone, data communication, and streaming broadcasting at low cost by effectively utilizing the high-speed communication network based on the IP method. can.

As an NGN communication service in Japan, there is "FLET'S Hikari Next" provided by Nippon Telegraph and Telephone Corporation (NTT) Group.
At FLET'S Hikari Next, IP communication is performed through an NGN consisting of an optical network unit (ONU), an optical line, line accommodation equipment, and an IP communication network, and telephone / videophone services and Internet connection providers (Internet Service Provider; ISP) access service, IP broadcasting, VoD (Video on Demand) service, corporate network service, etc. can be used (see, for example, Non-Patent Document 1). ..

By the way, according to FLET'S Hikari Next, a telephone number as an identification number is fixedly assigned to a communication line connected to the NGN, while a terminal device connected to the communication line establishes a connection with the NGN. An IPv6 address is dynamically assigned each time.

That is, in FLET'S Hikari Next, the IPv6 address is not unique to the communication line, but is assigned to the communication line each time the connection between the terminal device connected to the communication line and the NGN is established, and therefore, between the terminal devices. The IPv6 addresses assigned to each other's communication lines are unknown.

By the way, in order to perform peer-to-peer communication by IPv6 between terminal devices, it is necessary that the IPv6 addresses of the other parties are known to each other.
However, as described above, in FLET'S Hikari Next, a pair of terminal devices that should perform peer-to-peer communication cannot know each other's IPv6 address assigned to the other's communication line, so peer-to-peer communication. There was a problem that it could not be done.

In addition, in Fretz Hikari Next, some of the services provided by PSTN's Integrated Services Digital Network (ISDN) (for example, D-CH packet communication, B-CH packet communication, unrestricted digital communication). Etc.) are not supported, but there are still many users who use the ISDN service, so in order to be able to continue using the ISDN service even after the transition to NGN, connect to the ISDN communication line and ISDN. It is necessary to provide a conversion means for transmitting a signal to NGN.

However, when the ISDN signal is converted into an IPv6 packet signal and transmitted to NGN, since the IPv6 address of the other party's communication line is unknown, the connection between the ISDN terminals is the same as in the case of the above peer-to-peer communication. There was a problem that it could not be done.

"Technical Reference Material IP Communication Network Service Interface -FLET'S Series- <Hikari Next, Hikari Light, Hikari WiFi Access Edition> 22nd Edition", Nippon Telegraph and Telephone West Corporation, February 1, 2018

Therefore, an object of the present invention is to enable peer-to-peer communication by IPv6 between terminal devices via NGN.

In order to solve the above problem, it is composed of an NGN (Next Generation Network) and a plurality of terminal devices connected to the NGN via a communication line, and a telephone number is fixedly used as an identification number for the communication line. On the other hand, the IPv6 address is dynamically assigned each time the connection between the terminal device connected to the communication line and the NGN is established, and the IP communication is performed based on the telephone number and the IPv6 address. It is a method of performing peer-to-peer communication by IPv6 between the terminal devices in the system.
A SIP (Session Initiation Protocol) between the terminal devices, including the own IPv6 address assigned by establishing a connection between each of the terminal devices and the NGN, and the destination is the telephone number of the other party's communication line. Message signals are transmitted to each other's communication line, the IPv6 address of the other party is acquired from the message signal received from the other party's communication line in each of the terminal devices, and the IPv6 address of the other party is acquired in each of the terminal devices. Provided is a method characterized in that the acquired IPv6 address of the other party is stored in relation to the telephone number of the other party, and peer-to-peer communication is performed between the terminal devices based on the IPv6 address. Will be done.

Here, SIP refers to a signaling protocol (signal control protocol) for communicating voice, video, etc. in real time on an IP network (the same applies hereinafter).

According to the present invention, prior to peer-to-peer communication, IPv6 addresses assigned by establishing a connection between each terminal device and NGN are notified to each other between the terminal devices using a SIP message signal, and each terminal is notified. In the device, the acquired IPv6 address of the other party is stored in relation to the telephone number of the other party.
As a result, the problem of the address between the terminal devices (the problem that the IPv6 address of the other party is unknown to each other) is solved, and it becomes possible to perform peer-to-peer communication by IPv6 between the terminal devices.

It is a figure which illustrates the communication system to which the method of performing peer-to-peer communication by IPv6 via NGN by this invention is applied. It is a sequence diagram explaining the method by this invention.

Hereinafter, the configuration of the present invention will be described with reference to the accompanying drawings based on preferred embodiments.
FIGS. 1A to 1C are diagrams illustrating a communication system to which a method of performing peer-to-peer communication by IPv6 via NGN according to the present invention is applied.
With reference to FIG. 1A, in this embodiment, the communication system is premised on a communication system operated by the communication service "FLET'S Hikari Next" provided by Nippon Telegraph and Telephone Corporation (NTT) Group, and is an NGN (Next Generation Network). It is composed of a next-generation communication network) 3 and a plurality of terminal devices 1 and 2 connected to the NGN 3 via communication lines (Ethernet) 4 and 5, respectively.
In FIG. 1A, for simplification of the description, only two terminal devices 1 and 2 facing each other via NGN3 are illustrated.

FIG. 1B is a diagram showing the configuration of NGN3 of FIG. 1A in more detail.
As shown in FIG. 1B, the NGN 3 has an IP communication network 30, a line accommodating facility 33 on the first communication line 4 side, and a first communication line 4 connected to the line accommodating facility 33 via an optical line 41. It has an ONU 31 on the side, a line accommodating facility 34 on the second communication line 5 side, and an ONU 32 on the second communication line 5 side connected to the line accommodating facility 34 via an optical line 42.

The first terminal device 1 is connected to the ONU 31 via the first communication line 4, and the second terminal device 2 is connected to the ONU 32 via the second communication line 5.

According to the present invention, prior to peer-to-peer communication, first, each of the terminal devices 1 and 2 acquires their own IPv6 address. This is done as follows:
That is, when the terminal devices 1 and 2 are connected to the related communication lines 4 and 5 and start up (link up), the RS message (the part that functions as the router of the ONU) is sent to the related ONUs 31 and 32 (the part that functions as the router of the ONU). Router request) is sent.

The ONUs 31 and 32 (the part that functions as the router of the ONU) that have received the RS message are RA messages (routers) that include the prefix (part of the address) of the IPv6 address for the terminal devices 1 and 2 that are the sources of the RS message. Advertisement) is sent.

Then, the terminal devices 1 and 2 that have received the RA message generate (acquire) their own IPv6 address (global unicast address) from the prefix and their own MAC address.

The method by which the terminal device generates (acquires) its own address prior to peer-to-peer communication is not limited to this, and a known appropriate method (for example, stateless automatic setting or the like) can be used.

According to the present invention, next, using a message signal (MESSAGE packet) of the communication method SIP (Session Initiation Protocol) that realizes the telephone function of NGN, the terminal devices 1 and 2 notify each other of their own IPv6 address. .. This is done in the sequence shown in FIG.

With reference to FIG. 2, the telephone number of the first communication line 4 is now referred to as Tel. A, the IP address is Addr. Let A be, and the telephone number of the second communication line 5 is Tel. B, IP address is Addr. As B, for example, the telephone number Tel. Of the second communication line 5 with respect to the first terminal device 1 to the second terminal device 2. A SIP message signal destined for B is sent to this message by the telephone number Tel. Of its own communication line (first communication line) 4. A and IP address Addr. A is attached and transmitted (S1 in FIG. 2).

Then, NGN3 sends the message signal to the telephone number Tel. It is transmitted to the second terminal device 2 based on B (S2 in FIG. 2).
The second terminal device 2 receives the message signal, and from this message signal, the IP address of the first communication line 4 Addr. A and phone number Tel. A and the IP address Addr. A is the telephone number Tel. It is associated with A and stored (S3 in FIG. 2).

Next, the second terminal device 2 has the telephone number Tel. Of the first communication line 4. A SIP message signal destined for A is added to this message signal by the telephone number Tel. Of its own communication line (second communication line) 5. B and IP address Addr. B is attached and transmitted (S4 in FIG. 2).

Then, NGN3 sends the message signal to the telephone number Tel. It is transmitted to the first terminal device 1 based on A (S5 in FIG. 2).
The first terminal device 1 receives the message signal, and from this message signal, the IP address Addr. B and phone number Tel. B is acquired and the IP address Add. B is the telephone number Tel. It is stored in relation to B (S6 in FIG. 2).

In this way, the problem of the address between the first and second terminal devices 1 and 2 (the IPv6 address of the other party is unknown to each other) is solved, and thereby, between the first and second terminal devices 1 and 2. Peer-to-peer communication using IPv6 becomes possible (S7 in FIG. 2).

According to the present invention, the communication service (FLET'S Hikari Next, etc.) provided to the communication line identified by the telephone number, which is a feature of NGN and maintains and guarantees the desired safety, is also peered by IPv6. Two-peer communication is possible.

Further, according to the present invention, peer-to-peer communication by IPv6 can be performed between ISDN terminals via NGN.
In this case, as shown in FIG. 1C, in the communication system of FIG. 1A, conversion devices 10 and 20 (an interface for connecting an ISDN terminal and an ISDN signal) are connected to the first and second terminal devices 1 and 2, respectively. A device having a function of converting an IPv6 signal into an IPv6 signal) is added, and ISDN terminals 11 and 21 are connected to the conversion devices 10 and 20 of the terminal devices 1 and 2.

Then, for example, when data is transmitted from the ISDN terminal 11 to the ISDN terminal 21, the connection destination telephone number Tel. When the communication request including B is transmitted, the first terminal device 1 sends the telephone number Tel. Of its own communication line (first communication line) 4 to the second terminal device 2 as in the embodiment of FIG. A and IP address Addr. A SIP message signal including A is transmitted.

The second terminal device 2 has the IP address Addr. Of the first communication line 4 from the received message signal. A and phone number Tel. Acquire A, and IP address Addr. A is the telephone number Tel. After associating and storing A, the telephone number Tel. Of its own communication line (second communication line) 5 with respect to the first terminal device 1. B and IP address Addr. A SIP message signal including B is transmitted.

Next, the first terminal device 1 uses the received message signal to obtain the IP address Addr of the second communication line 5. B and phone number Tel. B is acquired, and the IP address Addr. B is the telephone number Tel. Memorize in relation to B.

As a result, the first and second terminal devices 1 and 2 acquire the IP address of the other party to solve the problem of the address (the IP address of the other party is unknown to each other), and can directly communicate with each other. , IPv6 communication is possible between the ISDN terminals 11 and 21 via the exchange devices 10 and 20.

Thus, according to the method of the present invention, the communication of the ISDN terminals 11 and 12 connected to the lower portions of the terminal devices 1 and 2 (conversion devices 10 and 20), that is, the D-CH packet communication and the B-CH packet communication can be performed. It can be executed via NGN's IPv6 communication.

Although the preferred embodiment of the present invention has been described above, the configuration of the present invention is not limited to the above embodiment, and various modifications are made within the scope of the configuration described by those skilled in the art in the claims of the present application. Needless to say, it is possible to come up with.

For example, according to another embodiment of the present invention, in a sensor network, a factory remote control system, an infrastructure monitoring system, etc., IoT communication responsible for information transmission between the center side and the terminal side is performed via FLET'S Hikari Next of NGN. Can be done.

Further, in the above embodiment, the NGN communication service provided by NTT Group, FLET'S Hikari Next, is assumed, but the method of the present invention is that the communication line is identified by a telephone number and an IPv6 address dynamically assigned is used. It can also be applied to other communication services that can be exchanged with each other.

1 1st terminal device 2 2nd terminal device 3 NGN
4 First communication line 5 Second communication line 10 Conversion device 11 ISDN terminal 20 Conversion device 21 ISDN terminal 30 IP communication network 31, 32 ONU
33, 34 line accommodation equipment 41, 42 optical line

Claims (1)

It consists of an NGN (Next Generation Network) and a plurality of terminal devices connected to the NGN via a communication line, and a telephone number is fixedly assigned as an identification number to the communication line, while the communication line is used. An IPv6 address is dynamically assigned each time a connection between the terminal device connected to the terminal device and the NGN is established, and IP communication is performed between the terminal devices in a communication system based on the telephone number and the IPv6 address. It is a method of performing peer-to-peer communication by IPv6.
A SIP (Session Initiation Protocol) between the terminal devices, including the own IPv6 address assigned by establishing a connection between each of the terminal devices and the NGN, and the destination is the telephone number of the other party's communication line. Message signals are transmitted to each other's communication line, the IPv6 address of the other party is acquired from the message signal received from the other party's communication line in each of the terminal devices, and the IPv6 address of the other party is acquired in each of the terminal devices. A method characterized in that the acquired IPv6 address of the other party is stored in relation to the telephone number of the other party, and peer-to-peer communication is performed between the terminal devices based on the IPv6 address.

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