KR20030027995A - Communication Apparatus with Auto Routing Configuration - Google Patents

Abstract

PURPOSE: A communication apparatus having a routing path automatic setting function is provided to set automatically a routing path whenever a user connects to an IPv6(Internet Protocol Version 6) network by wire. CONSTITUTION: An IPv6 network(100) is constructed by a network having same or other prefix. A workstation(100), a VoIP(Voice over Internet Protocol) phone(120), and a mobile terminal(130) are connected to the IPv6 network(100). The workstation(100) is operated in a window or unix operating system. The VoIP phone(120) changes a voice signal into a packet and then transmits the packet, thereby performing a telephone call by the Internet. The mobile terminal(130) is an IMT(International Mobile Telecommunications) 2000 terminal and has audio telephone and browser functions. The workstation(100) is connected to a router(140) and the VoIP phone(120) is connected to a router(150). The workstation(100) and the VoIP phone(120) are connected to a server(170) via routers. The mobile terminal(130) is connected to a server(180) via a router(180). At this time, the mobile terminal(130) is connected to other router by the movement of the terminal.

Description

Communication Apparatus with Automatic Routing Path Configuration {Communication Apparatus with Auto Routing Configuration}

The present invention relates to a routing path setting. More particularly, the present invention relates to a routing path so that a communication device newly connected to an Internet Protocol Version 6 (IPv6) network can transmit a packet to a communication device having an IPv6 address of a different destination. It is about how to set automatically.

The Internet protocol currently in use utilizes version 4 of Internet Protocol Version 4 (IPv4) technology. Such IPv4 technology is becoming increasingly difficult to use the Internet due to technical limitations at the time of design. Moreover, problems of IPv4 design are caused by various aspects such as complexity of setting to use network, lack of address due to rapid spread of Internet, complexity of address system change to reduce routing table, quality of service, and billing.

In order to overcome this problem, a new addressing Internet technology called IPv6 of Internet Protocol Version 6 has recently been studied. This new address system by IPv6 attempts to solve problems such as address depletion, routing efficiency, security, quality of service, and mobility that are emerging as problems in IPv4.

In particular, address autoconfiguration of IPv6 is intended to solve the complexity of network configuration in conventional IPv4. That is, IPv6 uses the Neighbor Discovery Protocol (NDP) to automatically set an IPv6 address for a new communication device when the new communication device is connected to the IPv6 network.

However, the IPv6 address autoconfiguration function cannot solve all the complexity of the network configuration because the IPv6 prefix has to set routing path information in the new communication device in order to exchange packets with the communication device of the IPv6 address of another destination. There is this.

Accordingly, an object of the present invention is to provide a communication device having an automatic routing path setting function that can automatically set a routing path whenever a new wired connection is made to an IPv6 network. .

In addition, another object of the present invention is to provide a communication device having an automatic routing path setting function that can automatically set a routing path whenever a wirelessly connected to an IPv6 network is newly connected or the reception area is changed.

1 is a diagram schematically showing the configuration of an IPv6 network according to an embodiment of the present invention.

2 is a flowchart illustrating a step of automatically setting a routing path by data transmission between a new access communication device and a router according to an embodiment of the present invention.

3 is a diagram illustrating a format of a routing address request message cast to a network from a new access communication device according to an embodiment of the present invention.

4 is a diagram illustrating a format of a routing address response message transmitted from a router to a new access communication device according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

110: workstation 120: VoIP phone

130: mobile terminal 140 ~ 160: router

170, 180: server

According to a feature of the present invention proposed to achieve the above object, a communication device having an automatic routing path setting function broadcasts a router address request message every time a new connection is made to the IPv6 network by wire, and the router address request Receiving a router address response message from the router in response to the message, and extracts the route information of the router based on the received router address response message to set the routing path.

In a preferred embodiment of this aspect, the router address request message includes type information indicating that the message is a router address request message.

In a preferred embodiment of this aspect, the router address response message includes type information indicating that the message is a router address response message.

According to a feature of the present invention proposed to achieve the above object, a communication device having an automatic routing path setting function broadcasts a router address request message whenever a wireless connection to the IPv6 network is newly performed or a communication area is changed. Then, a router address response message is received from the router in response to the router address request message, and route information of the router is extracted and set as a routing path based on the received router address response message.

In a preferred embodiment of this aspect, the router address request message includes type information indicating that the message is a router address request message.

In a preferred embodiment of this aspect, the router address response message includes type information indicating that the message is a router address response message.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 4.

1 is a diagram schematically illustrating a configuration of an IPv6 network according to an embodiment of the present invention. In the drawings, reference numeral 100 denotes an IPv6 network, 110 denotes a workstation, 120 denotes a VoIP phone, 130 denotes a mobile terminal, 140-160 denotes a router, and 170 and 180 denote servers.

The IPv6 network 100 is composed of networks having the same or different prefixes. The workstation 110, the VoIP phone 120, and the mobile terminal 130 are communication devices newly connected to the IPv6 network 100.

The workstation 110 may run on, for example, an operating system of Windows or Unix. In addition, the VoIP phone 120 converts the voice signal into a packet so as to make a call over the Internet and transmits the packet. The mobile terminal 130 has, for example, an IMT2000 terminal as a voice telephone and an internet browser.

The workstation 110 is connected to the router 140, the VoIP phone 120 is connected to the router 150. The workstation 110 and the VoIP phone 120 connected as described above are connected to the server 170 via respective routers.

Similarly, the mobile terminal 130 is connected to the server 180 via the router 160. At this time, the mobile terminal 130 is connected to another router due to the movement of the terminal.

2 is a flowchart illustrating a step of automatically setting a routing path by data transmission between a new access communication device and a router according to an embodiment of the present invention.

First, when the workstation 110, the VoIP phone 120, or the mobile terminal 130 is newly connected to the IPv6 network, each communication device sends a router address request message to know the address of the router (S1). The router address request message is shown in FIG. 3. The router address request message as described above transmits a multicast address as a destination address so that all routers receive a link local unicast address and a source link layer address of a newly connected device. .

After receiving the router address request message, the router transmits the router address response message to the newly connected communication device to inform the router address (S3). The router address response message is shown in FIG. The router address response message as described above transmits the link local address of the terminal as the destination address so that the newly connected device receives the prefix information of the router, the link local unicast address of the router, and the link layer address.

Then, the newly connected communication device receives the router address response message from the router and establishes a routing path based on the prefix information of the received message (S5).

This routing path is established when the communication terminal is newly booted to connect to the IPv6 network. On the other hand, when the communication terminal is a mobile, it is performed every time the communication area is changed.

3 is a diagram illustrating a format of a routing address request message transmitted from a new access communication device to a network according to an embodiment of the present invention.

As shown in the figure, the routing address request message includes a version, a traffic class, a flow label, a payload length, a next header, a hop limit, and a hop limit. It consists of Limit, Source Link Local Address (Source Address), Destination Link Local Address (Destination Address), Type (Type), Code (Code), Checksum, and Source Link Layer Address.

The Version (Version) is composed of 4 bits to indicate the version of the Internet Protocol, in the present invention is set to "6" indicating IPv6.

The traffic class is composed of 8 bits and is used to provide a differentiated service according to the type of data by indicating the type of the packet of IPv6. For example, it is desirable to transmit the voice signal with a priority for the delay and for the email with a priority for the accuracy of the contents. Such a traffic class may apply the type of service (TOS) of IPv4.

In addition, a flow label is composed of 20 bits and is used when processing specific packets in a communication unit called a flow. The payload length consisting of 16 bits is set to indicate the size of the packet excluding the packet header of IPv6. The Next header is composed of 8 bits and indicates that the header is next to the basic header of IPv6.

The hop limit is set to a value of 8 bits, and each time it passes through the router, the value is decreased by 1, and when it reaches 0, the packet is not delivered any more and is discarded. This is to prevent excessive traffic by sending a packet that cannot find its destination to the Internet.

The source link local address (Source Address) is a 128-bit address generated by an IPv6 source communication device requesting an address from the router and is used only between the source communication device and the router.

The 128-bit destination link local address (Destination Address) is a destination address for finding a router and is a multicast address to be transmitted only to the router in the network. The multicast address is set to "FF01 :: 2".

Type consists of 8 bits and is set to " 133 ". In this way, the Type is set to "133" to indicate that the packet is a router address request message.

The last source link layer address consists of 48 bits and is used as the Media Access Control (MAC) address for the network interface.

4 is a diagram illustrating a format of a routing address response message transmitted from a router to a new access communication device according to an embodiment of the present invention.

As shown in the figure, the routing address response message includes a version, a traffic class, a flow label, a payload length, a next header, a hop limit, and a hop limit. Limit, Source Link Local Address, Destination Link Local Address, Type, Code, Checksum, Current Hop Limit, Router Life Time Lifetime), a source link layer address (Source Link Layer Address), and prefix information (Prefix Information).

The version, traffic class, flow label, payload length, next header, hop limit of the routing address response message may be a routing address request. Same as the message.

The source link local address (Source Address) is a 128-bit long address generated at the router and used only between the router and the communication terminal.

The destination link local address is composed of 128 bits and has a value of a source link local address of a routing address request message.

Type is composed of 8 bits and is set to " 134 ". In this way, the Type is set to "134" to indicate that the packet is a router address response message.

The current hop limit consists of 8 bits and is set to "255".

Router Lifetime represents the renewal period of the Router Address Response message, the value of which is in seconds.

The source link layer address is composed of 48 bits and represents a MAC (Media Access Control) address of an interface used to communicate with a communication terminal in a router.

Prefix information refers to a router interface of a network to which a communication terminal is connected, and means an upper 64-bit address of a 128-bit address of IPv6.

According to the present invention, when a communication device is newly connected to an IPv6 network, a network path can be automatically set so that a packet can be transmitted to a communication device having an IPv6 address of a destination other than the same prefix. Voice signals can be delivered at any time while the device is stationary or mobile. In particular, in the case of a computer, it is convenient to use the Internet, such as sending and receiving e-mail or searching the web.

In addition, according to the present invention, it is possible to automatically set the routing path whether the communication device is used in the home network or moved to another network.

Claims (6)

In a communication device that is connected to a network of the Internet Protocol IPv6 by wire and exchanges data, Broadcast a router address request message every time a new connection is made to the IPv6 network by wire, Receiving a router address response message from a router responsive to the router address request message, And extracting route information of the router based on the received router address response message and setting the route information as a routing path. The method of claim 1, And the router address request message includes type information indicating that the message is a router address request message. The method of claim 1, And the router address response message includes type information indicating that the message is a router address response message. In a communication device for wirelessly connecting to a network of Internet Protocol IPv6 and exchanging data, Broadcast a router address request message whenever a wireless connection is made to the IPv6 network or a communication area is changed. Receiving a router address response message from a router responsive to the router address request message, And extracting route information of the router based on the received router address response message and setting the route information as a routing path. The method of claim 4, wherein And the router address request message includes type information indicating that the message is a router address request message. The method of claim 4, wherein And the router address response message includes type information indicating that the message is a router address response message.