JP2019213005A - Method for performing peer-to-peer communication using ipv6 via ngn - Google Patents

Abstract

To make it possible to perform peer-to-peer communication between terminal apparatuses using IPv6 via an NGN.SOLUTION: A method presupposes a communication system composed of an NGN 3 and a plurality of terminal apparatuses 1, 2 that are connected to the NGN via communication channels 4, 5, respectively, where a phone number is assigned in a fixed manner to a communication channel as an identification number and an IPv6 address is dynamically assigned every time connection between a terminal apparatus connected to the communication channel and the NGN is established and where IP communication is performed on the basis of the phone number and the IPv6 address. The respective terminal apparatuses report IPv6 addresses, which are assigned at the time of establishing connection between the NGN and the respective terminal apparatuses prior to peer-to-peer communication, to each other by performing packet communication based on phone numbers between the terminal apparatuses after communication establishment. Each terminal apparatus stores the other terminal apparatus's IPv6 address in connection with the other terminal apparatus's phone number and performs the peer-to-peer communication with the other terminal apparatus on the basis of the IPv6 address.SELECTED DRAWING: Figure 2

Description

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

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

NGN is a network that combines the same safety as the line switching system used in PSTN, the convenience of a communication line designation method using a telephone number as a caller ID (identification number), and the economics of an IP system. .
In NGN, the telephone number assigned to each communication line connected to this network is managed on the network side, and unauthorized access is blocked at the entrance of the network, and security measures are taken to ensure safe and high-quality services. provide.
In addition, according to NGN, it is possible to provide a service combining voice communication with data communication or a service combining telephone / data communication / streaming broadcasting at low cost by effectively using a high-speed communication network based on the IP system. it can.

NGN's communication services in Japan include “FLET'S Hikari Next” provided by the Nippon Telegraph and Telephone Corporation (NTT) Group.
In FLET'S Hikari Next, IP communication is performed through NGN, which consists of an optical network unit (ONU), an optical network, a line accommodation facility, and an IP communication network. (Internet Service Provider; ISP) access service, IP broadcast, VoD (Video on Demand) service, and in-house network service can be used (for example, see 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 NGN, while a terminal device connected to the communication line establishes a connection with NGN. Each time, an IPv6 address is dynamically assigned.

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

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

  In FLET'S 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.) is not supported, but there are still many users who use the ISDN service. Therefore, in order to continue using the ISDN service even after the transition to NGN, it is connected to the NGN communication line and ISDN. There is a need to provide conversion means for transmitting signals to NGN.

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

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

  Accordingly, 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 problems, according to the present invention, an NGN (Next Generation Network) and a plurality of terminal devices each connected to the NGN via a communication line are provided. While a telephone number is fixedly assigned, an IPv6 address is dynamically assigned every time a connection between the terminal device connected to the communication line and the NGN is established, and based on the telephone number and the IPv6 address. A method for performing peer-to-peer communication by IPv6 between the terminal devices in a communication system in which IP communication is performed, wherein a connection between each of the terminal devices and the NGN is performed prior to the peer-to-peer communication. Packet communication based on the telephone number is performed between the terminal devices using the IPv6 address assigned by establishment. In each of the terminal devices, the acquired IPv6 address of the other party is stored in association with the telephone number of the other party, and the peer-to-peer communication is performed between the terminal devices based on the IPv6 address. A method is provided that includes communicating.

According to a preferred embodiment of the present invention, the notification of the IPv6 address by the packet communication based on the telephone number between the terminal devices is performed by using the IPv6 address of the other terminal device with respect to the communication line of the other party. By transmitting a message signal (MESSAGE packet) of a session establishment protocol (SIP) that includes the IPv6 address of the other party from the message signal received from the other party's communication line in each of the terminal devices. Do.
Here, SIP refers to a signaling protocol (signal control protocol) for performing communication such as voice and video in real time on an IP network (the same applies hereinafter).

  According to another preferred embodiment of the present invention, an interface for connecting an ISDN terminal to the terminal device and a function for converting an ISDN signal into an IPv6 signal are added, and an ISDN terminal is connected to each of the terminal devices. By doing so, peer-to-peer communication by the IPv6 is performed between the ISDN terminals via the related terminal devices.

According to the present invention, prior to peer-to-peer communication, the IPv6 address assigned by establishing a connection between each terminal device and NGN is notified to each other by performing packet communication based on the telephone number between the terminal devices. In each terminal 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 address problem 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.

1 is a diagram illustrating a communication system to which a method for performing peer-to-peer communication using IPv6 through NGN according to the present invention is applied; FIG. FIG. 3 is a sequence diagram illustrating a method according to the present invention.

Hereinafter, the configuration of the present invention will be described based on preferred embodiments with reference to the accompanying drawings.
1A to 1C are diagrams illustrating a communication system to which a method for performing peer-to-peer communication based on IPv6 through NGN according to the present invention is applied.
Referring to FIG. 1A, in this embodiment, the communication system is premised on a communication system operated by a communication service “FLET'S Hikari Next” provided by Nippon Telegraph and Telephone Corporation (NTT) Group. 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, only two terminal devices 1 and 2 that face each other via NGN 3 are illustrated for the sake of simplicity of explanation.

FIG. 1B is a diagram showing the configuration of NGN 3 in FIG. 1A in more detail.
As shown in FIG. 1B, the NGN 3 includes an IP communication network 30, a line accommodation facility 33 on the first communication line 4 side, and a first communication line 4 connected to the line accommodation facility 33 via an optical line 41. Side ONU 31, second communication line 5 side line accommodation facility 34, and second communication line 5 side ONU 32 connected to line accommodation facility 34 via 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 its own IPv6 address. This is performed as follows.
That is, when the terminal devices 1 and 2 are connected to the related communication lines 4 and 5 and are started up (linked up), the terminal devices 1 and 2 send RS messages to the related ONUs 31 and 32 (parts functioning as ONU routers). Router request).

  The ONUs 31 and 32 (the part functioning as the router of the ONU) that received the RS message receive the RA message (router) including the IPv6 address prefix (part of the address) for the terminal devices 1 and 2 that are the transmission source of the RS message. Ad).

  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.

  Note that the method of generating (acquiring) the self-address before the peer-to-peer communication by the terminal device is not limited to this, and a known appropriate method (for example, stateless automatic setting or the like) can be used.

  Next, according to the present invention, the terminal device 1 and 2 notify each other of their IPv6 addresses using a message signal (MESSAGE packet) of a communication method SIP (Session Initiation Protocol) that realizes the NGN telephone function. . This is performed in the sequence shown in FIG.

  Referring to FIG. 2, the telephone number of first communication line 4 is now set to Tel. A, the IP address is set to Addr. A and the telephone number of the second communication line 5 is Tel. B, the IP address is set to Addr. B, for example, from the first terminal device 1 to the second terminal device 2, the telephone number Tel. SIP message signal destined for B is added to the telephone number Tel. Of its own communication line (first communication line) 4 in this message. A and IP address Addr. A is attached and transmitted (S1 in FIG. 2).

Then, NGN 3 transmits the message signal to telephone number Tel. Based on B, it transmits to the 2nd terminal device 2 (S2 of FIG. 2).
The second terminal device 2 receives the message signal, and from this message signal, the IP address Addr. A and telephone number Tel. A and the IP address Addr. A is a telephone number Tel. A is stored in association with A (S3 in FIG. 2).

  Next, the second terminal device 2 sends the telephone number Tel. A SIP message signal destined for A is connected to the telephone number Tel. B and IP address Addr. B is attached and transmitted (S4 in FIG. 2).

Then, NGN 3 transmits the message signal to telephone number Tel. It transmits to the 1st terminal device 1 based on A (S5 of FIG. 2).
The first terminal device 1 receives the message signal, and from this message signal, the IP address Addr. B and telephone number Tel. B and the IP address Add. B with the telephone number Tel. It is stored in relation to B (S6 in FIG. 2).

  Thus, the address problem between the first and second terminal devices 1 and 2 (the other's IPv6 address is unknown to each other) is solved, and thereby, between the first and second terminal devices 1 and 2. Peer-to-peer communication by IPv6 becomes possible (S7 in FIG. 2).

  According to the present invention, in the communication service (FLET'S Hikari Next etc.) provided to the communication line identified by the telephone number while maintaining and guaranteeing the intended safety, which is a feature of NGN, Two-peer communication is possible.

Furthermore, according to the present invention, peer-to-peer communication based on 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 (interfaces for connecting ISDN terminals and ISDN signals to the first and second terminal devices 1 and 2, respectively) Is added to the IPv6 signal, and the ISDN terminals 11 and 21 are connected to the conversion devices 10 and 20 of the terminal devices 1 and 2, respectively.

  For example, when data is transmitted from the ISDN terminal 11 to the ISDN terminal 21, the destination telephone number Tel. When the communication request including B is transmitted, the first terminal device 1 transmits 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 receives the IP address Addr. Of the first communication line 4 from the received message signal. A and telephone number Tel. A and IP address Addr. A is a telephone number Tel. After associating and storing A, the telephone number Tel. Of the own communication line (second communication line) 5 to the first terminal device 1 is stored. B and IP address Addr. SIP message signal including B is transmitted.

  Next, the first terminal device 1 determines the IP address Addr. Of the second communication line 5 from the received message signal. B and telephone number Tel. B, and the IP address Addr. B with the telephone number Tel. Store in relation to B.

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

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

  Although the preferred embodiments of the present invention have been described above, the configuration of the present invention is not limited to the above-described embodiments, and various modifications may be made by those skilled in the art within the scope of the configurations described in the claims of the present application. Needless to say, it can be devised.

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

  In the above embodiment, the NGN communication service provided by the NTT group, FLET'S Hikari Next, is assumed. However, in the method of the present invention, the communication line is identified by the telephone number, and the dynamically assigned IPv6 address is The present invention can also be applied to other communication services that can be exchanged with each other.

1 First terminal device 2 Second 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 networks 31, 32 ONU
33, 34 Line accommodation equipment 41, 42 Optical line

Claims (3)

An NGN (Next Generation Network) and a plurality of terminal devices each connected to the NGN via a communication line, and a telephone number is fixedly assigned to the communication line as an identification number. An IPv6 address is dynamically assigned each time a connection between the terminal device connected to the network and the NGN is established, and communication is performed between the terminal devices in a communication system in which IP communication is performed based on the telephone number and the IPv6 address. A method for performing peer-to-peer communication using IPv6, comprising:
Prior to the peer-to-peer communication, the IPv6 address assigned by establishing a connection between each of the terminal devices and the NGN is notified to each other by performing packet communication based on the telephone number between the terminal devices. In each of the terminal devices, the acquired IPv6 address of the other party is stored in association with the telephone number of the other party, and the peer-to-peer communication is performed between the terminal devices based on the IPv6 address. A method characterized by that.   The notification of the IPv6 address by the packet communication based on the telephone number between the terminal devices is a SIP (Session Initiation Protocol) message signal including the IPv6 address of the other terminal device with respect to the communication line of the other party. The method according to claim 1, further comprising: obtaining the IPv6 address of the counterpart from the message signal received from the counterpart communication line in each of the terminal devices.   By adding an interface for connecting an ISDN terminal to the terminal device and a function of converting an ISDN signal into an IPv6 signal, and connecting the ISDN terminal to each of the terminal devices, the ISDN terminals are related to each other. The method according to claim 1 or 2, wherein peer-to-peer communication based on the IPv6 is performed via the terminal device.

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