KR100740886B1 - Method for IPv6 Multicast based N-to-N Group Tutoring System in the Home Network - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a multi-party group extra service providing method using IPv6 multicast function in home network.

2. The technical problem to be solved by the invention

The present invention solves the multicast forwarding problem in the Linux-based home server, and also solves the structured IPv6 multicast packet processing problem in the Linux kernel, and provides IPv6 in the home network through the home server. Its purpose is to provide a multi-party group extra service using the multicast function.

3. Summary of Solution to Invention

The present invention provides a method for providing a multi-party group extracurricular service using IPv6 multicast function in a home network, comprising: a multicast communication transmission / reception determining step of determining a multicast communication transmission / reception for a group extracurricular service by a user in a home; As a result of the decision in the multicast communication transmission / reception determination step, when a session corresponding to the transmission of multicast communication is held, a database server is executed, and a group information registration message is transmitted to the home server HS. The group information registration message is registered in the rendezvous point RP to confirm that the rendezvous point is registered in the rendezvous point RP, and the group tutoring service is completed by transmitting the group registration information and completing the group tutoring service. step; And as a result of the decision in the multicast communication transmission / reception determination step, in the case of the reception of the multicast communication, the multicast is received, the group information which is a group subscription message is transmitted to the home server HS, and the rendezvous point ( RP) to receive the group information to register the reception information, and after confirming that the registration to the rendezvous point (RP), the group subscription information is sent to complete the communication preparation and group tutoring service receiving step to start the group tutoring service Including, but the home server (HS), using the information of the multicast group list serves as a multicast group management database (DB) server, anyone can hold a multicast session regardless of the user's authority In addition, PIM-SM (Protocol Independent Multicast-Sparse Mode) and MLD (Multicast Listener Discovery) functions are added to the home server. To enable the forwarding also characterized in that it allows to act rendezvous point (Rendezvous Point).

4. Important uses of the invention

The present invention is used in the next generation home network education system and multi-party video conferencing.

Home Network System, Home Server, Group Tutoring, IPv6 Multicast, PIM-SM, ASM

Description

Method for providing multi-party group extracurricular service using IP version 6 multicast function in home network {Method for IPv6 Multicast based N-to-N Group Tutoring System in the Home Network}

1 is a diagram illustrating an embodiment of a system for providing a multiparty group tutoring service using an IPv6 multicast function in a home network to which the present invention is applied.

2 is a detailed configuration diagram of an embodiment of a system for providing multiparty group tutoring service using an IPv6 multicast function in a home network to which the present invention is applied.

3 is a diagram illustrating an embodiment of a socket library capable of supporting both ASM-based IPv4 / IPv6 in a home network group and a service providing system according to the present invention.

4 is a flowchart illustrating a method of providing a multiparty group extracurricular service using IPv6 multicast function in a home network according to the present invention.

* Explanation of symbols for the main parts of the drawings

101 ~ 103: Home server (HS) 104: Multicast router (MR)

105: multicast group list (MGL), 106-109: user

The present invention relates to a method for providing multi-party group tutoring service using IPv6 multicast function in a ubiquitous home network, and more specifically, Linux with IPv6 multicast function. PIM-SM (Protocol Independent Multicast-Sparse Mode) function is used for home-based home server to enable service including multi-party voice / video / data sharing through PC in home. The present invention relates to a multi-party group extra service providing method using an IPv6 multicast function in a home network.

In general, there are various video conferencing applications and methods using unicast and multicast communication based on IPv4 (Internet Protocol version 4: hereinafter referred to as "IPv4"). However, when IPv6 is activated in an upcoming ubiquitous home network environment due to a lack of IPv4 address, indoor terminals communicating through a home server and a home gateway are inevitably assigned an IPv6 address. As a result, support for multicast over IPv6 is a challenge.

Currently, many video calls for IPv6 multicast and multicast communication over mobile IPv6 have been studied and developed in FreeBSD, an open source operating system of the Berkeley Software Distribution (BSD) family. Due to structural problems, that is, lack of IPv6 multicast forwarding function, there was a problem in that communication based on IPv6 multicast was impossible.

The present invention has been proposed to solve the above problems, and solves the multicast forwarding problem in the Linux-based home server, and also solves the structured IPv6 multicast packet processing problem in the Linux kernel through the multi-party group service through the home server An object of the present invention is to provide a multi-party group extra service providing method using the IPv6 multicast function in a home network that can provide the service.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

The method of the present invention for achieving the above object is a multi-party group extra service providing method using the IPv6 multicast function in a home network, the user in the home to determine the multicast communication transmission / reception for the group extra service Cast communication transmission / reception determination step; As a result of the decision in the multicast communication transmission / reception determination step, when a session corresponding to the transmission of multicast communication is held, a database server is executed, and a group information registration message is transmitted to the home server HS. The group information registration message is registered in the rendezvous point RP to confirm that the rendezvous point is registered in the rendezvous point RP, and the group tutoring service is completed by transmitting the group registration information and completing the group tutoring service. step; And as a result of the decision in the multicast communication transmission / reception determination step, in the case of the reception of the multicast communication, the multicast is received, the group information which is a group subscription message is transmitted to the home server HS, and the rendezvous point ( RP) to receive the group information to register the reception information, and after confirming that the registration to the rendezvous point (RP), the group subscription information is sent to complete the communication preparation and group tutoring service receiving step to start the group tutoring service Including, but the home server (HS), using the information of the multicast group list serves as a multicast group management database (DB) server, anyone can hold a multicast session regardless of the user's authority In addition, PIM-SM (Protocol Independent Multicast-Sparse Mode) and MLD (Multicast Listener Discovery) functions are added to the home server. Enabling the forwarding function to be characterized in that it allows to act rendezvous point (Rendezvous Point).

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an embodiment of a system for providing a multiparty group tutoring service using an IPv6 multicast function in a home network to which the present invention is applied.

In the home network to which the present invention is applied, the system for providing multi-party group tutoring service using the IPv6 multicast function is ASM (Any Source Multicast: hereinafter referred to as “ASM”) and SSM (Source Specific Multicast: hereinafter) which are multicast communication protocols. PIM-SM and MLD (Multicast Listener Discovery: hereinafter), to support multi-group group and other service technology that supports all of these technologies and supports IPv6 multicast as well as IPv4 multicast communication. By adding functionality called "MLD" and enabling multicast forwarding, this paper attempts to describe the structural problems of core technologies underlying the 4th generation education system in the coming ubiquitous era and propose solutions.

Accordingly, the present invention implements a PIM-SM IPv6 multicast router capable of supporting ASM in a Linux-based home server (HS), and builds an IPv6 multicast home network environment using this function. Based on this home network environment, it provides multi-party group tutoring service using IPv6 multicast.

In the figure, "101-103" denotes a home server (HS), "104" denotes a multicast router (MR), "105" denotes a multicast group list (MGL), and "106-109" denotes a user.

As shown in FIG. 1, the IPv6 multicast-based group extra service providing system operates as follows.

The user 106 holds the first multicast communication for managing multicast session management and group list, and sends the multicast group list 105 which is group information to the home server (HS) 101 in his home. Register.

The multicast group list 105 includes a group name (NAME), a multicast IP address of the group, a port number for communication, a user who currently participates (USER), and information (FLAG) for distinguishing between IPv4 or IPv6 communication. do.

In order to hold the first multicast communication, the home server (HS) 101 serves as a multicast group management database (DB) server by using five pieces of information of the multicast group list 105, and this process is performed by a user. Anyone can hold a session regardless of the authority of (User) (106 ~ 109). In this case, the database server for managing the multicast communication mainly includes address allocation and information recording in the multicast group list 105 and deletion of the multicast group list 105 when the multicast group is created. Have.

The user 107 ˜ 109 can then JOIN and communicate with the multicast group address generated by the user 106.

As a user increases, a method for identifying an individual user may be identified by referring to information of a user field of the multicast group list 105. That is, the USER field of the multicast group list 105 may include a group name (NAME) representing a name of a participating group, a participant user identifier (U-ID), an authority identifier (U-FLAG) identifying a session authority, and It has nickname used in group communication.

FIG. 2 is a detailed configuration diagram of a multi-party group extra service providing system using an IPv6 multicast function in a home network to which the present invention is applied. FIG. The exchange structure is shown in detail.

As shown in FIG. 2, in the multi-party group extra service providing system using the IPv6 multicast function in the home network, when the multicast host S sends group membership information to an adjacent home server HS, the home server It acts as an intermediary to source register to Rendezvous Point and to participate in multicast group and start communication.

Rendezvous Point, which identifies the sender and receiver for multicast communication and provides the source discovery function in the network, is generally located outside the home server (HS) as shown in FIG. The configuration of this system also enables the role of Rendezvous Point by adding PIM-SM and MLD functions in the home server and enabling multicast forwarding.

3 is a diagram illustrating an embodiment of a socket library capable of supporting both ASM-based IPv4 / IPv6 in a home network group and a service providing system according to the present invention.

As shown in FIG. 3, the socket library has a structure in which both an IPv4 address and an IPv6 address can be input at the time of initial access, and automatically recognizes the communication, without specifying a version.

The protocols required to share information in sessions using multicast sockets in this group and other service providing systems are largely utterance control (Auth), electronic board (Draw), PPT (Power Point) data exchange, video and voice (A / V). Divided by)

Before creating or joining an initial multicast group, you must go through a procedure for connecting to a database server, and set up a separate database server for this purpose.

The data record in the database server manages the multicast session with the information of the multicast group list (MGL) 105 of FIG. 1 and the information of the user (USER) field.

4 is a flowchart illustrating a method for providing a multiparty group extracurricular service using an IPv6 multicast function in a home network according to an embodiment of the present invention. The proposed multilateral group tutoring service can be viewed more easily.

As shown in FIG. 4, in the method for providing a multiparty group extracurricular service using the IPv6 multicast function in a home network according to the present invention, a user in the home first determines a multicast communication transmission / reception for a group extracurricular service ( 401).

As a result of the determination (401), when a session corresponding to the transmission of multicast communication is held, a database (DB) server is executed (402), and a group information registration message is transmitted to the home server (HS) (404). After registering the group information registration message to the rendezvous point (RP) (405) and confirming that it is registered to the rendezvous point (RP) (406), transmitting group subscription information (407) to complete the communication preparation and start the service. Use the service (408) (409).

As a result of the determination 401, in the case of receiving the multicast communication, the multicast is received (403), the group information which is a group join message is transmitted to the home server (HS) (410), and the rendezvous point (RP) is After transmitting the group information (410) to register the received information (411), and confirm that the registration to the rendezvous point (RP) (412), and then send the group subscription information (413) to complete the communication preparation and start the service 408 Use the service (409).

The group information transmission process (404, 410) to the group subscription information transmission process (407, 413) operates in the same way on the transmitting / receiving side, but the information is different in terms of the group information registration message and the group subscription message.

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form. Since this process can be easily implemented by those skilled in the art will not be described in more detail.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

As described above, the present invention provides multi-group group tutoring services in an IPv6 multicast-based home network, and can manage and utilize multicast communication using a home server. Cast forwarding problems can be easily solved. In other words, by adding PIM-SM and MLD functions to the home server and enabling multicast forwarding, it supports both ASM and SSM technologies, which are multicast communication protocols, and multi-party group that supports IPv6 multicast as well as IPv4 multicast communication. By implementing service technology, it can be suggested as an alternative to the 4th generation education system in the coming ubiquitous era.

Claims (8)

In the multi-party group extra service providing method using IPv6 multicast function in home network, A multicast communication transmission / reception determination step of determining a multicast communication transmission / reception for an out-of-group service by a user in a house; As a result of the decision in the multicast communication transmission / reception determination step, when a session corresponding to the transmission of multicast communication is held, a database server is executed, and a group information registration message is transmitted to the home server HS. The group information registration message is registered in the rendezvous point RP to confirm that the rendezvous point is registered in the rendezvous point RP, and the group tutoring service is completed by transmitting the group registration information and completing the group tutoring service. step; And As a result of the determination in the multicast communication transmission / reception determination step, in the case of reception of multicast communication, multicast is received, group information, which is a group join message, is transmitted to the home server HS, and the rendezvous point RP And receiving the group information by transmitting the group information to the rendezvous and confirming that it is registered in the rendezvous point (RP), and transmitting group subscription information to complete communication preparation and starting a group tutoring service. But The home server (HS), By using the information of the multicast group list serves as a multicast group management database (DB) server, anyone can hold a multi-party multicast session regardless of the user's authority, PIM-SM ( Protocol Independent Multicast-Sparse Mode), MLD (Multicast Listener Discovery) has been added to enable the multicast forwarding function to act as a Rendezvous Point (Rendezvous Point) to provide a multi-party group tutoring service. The method of claim 1, The group tutoring service holding step, The user holds the first multicast communication for managing multicast session management and group list, and registers the multicast group list, which is group information, in the home server (HS) of the user's home. How we deliver the service. The method according to claim 1 or 2, The multicast group list, Multiparty group tutoring comprising a group name (NAME), a multicast IP address of the group, a port number for communication, a user currently participating (USER) and information identifying whether the communication is IPv4 or IPv6 communication (FLAG) How we deliver the service. delete The method of claim 3, wherein The database server, A method for providing multi-party group tutoring services, the method comprising: assigning an address when the multicast group is created, recording information in the multicast group list, and deleting a multicast group list. The method of claim 3, wherein The USER field of the multicast group list is Multi-party including a group name (NAME) indicating the name of the group to join, a participant user identifier (U-ID), a permission identifier (U-FLAG) identifying session authority, and a nickname used in group communication. How to provide group tutoring. The method of claim 3, wherein The rendezvous point, A method for providing multi-party group tutoring services, characterized by identifying a transmitting side and a receiving side for multicast communication and providing a source side discovery function in a communication network. The method of claim 3, wherein The group tutoring service, ASM-based IPv4 / IPv6 socket library structure supports both IPv4 address and IPv6 address at the first access, automatically recognizes it, enables communication without specifying a version, and supports multicast sockets. Multiparty group tutoring services, including voice control (Auth), electronic board (Draw), PPT (Power Point) data exchange, moving picture and voice (A / V) How to Provide.

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