KR20070058854A - Apparatus and method for ipv6 stateless address auto-configuration in ieee 802.16 point-to-multipoint mode - Google Patents

Abstract

An apparatus and a method for IPv6 stateless address auto-configuration in an IEEE 802.16 Point-to-Multi-Point mode are provided to support the IPv6 stateless address auto-configuration of a terminal in a network using the IEEE 802.16 Point-to-Multi-Point mode wirelessly using a proxy. An apparatus for IPv6 stateless address auto-configuration in an IEEE 802.16 Point-to-Multi-Point mode includes a terminal information storing unit(24), an NS(Neighbor Solicitation) determining unit(21), and a proxy function processing unit(23). The terminal information storing unit(24) stores terminal information. The NS determining unit(21) distinguishes an NS packet transmitted from a terminal to other terminals on the same link during the IPv6 stateless address auto-configuration. The proxy function processing unit(23) checks whether the terminal corresponding to a destination IPv6 multi-cast address of the NS packet exists or not based on the terminal information, generates an NA(Neighbor Advertisement) packet as a terminal proxy based on the corresponding terminal information, and transmits the NA packet to other terminal.

Description

Apparatus and method for IPv6 stateless address auto-configuration in IEEE 802.16 Point-to-MultiPoint mode}

1 is an exemplary configuration diagram of a portable Internet to which the present invention is applied;

2 is a configuration diagram of an apparatus for supporting IPv6 stateless address autoconfiguration according to the present invention;

3 is a flowchart illustrating a method for supporting IPv6 stateless address autoconfiguration according to the present invention.

* Explanation of symbols on the main parts of the drawing

21: NS determination unit 22: BS function processing unit

23: Proxy function processing unit 24: Terminal information storage unit

The present invention relates to an apparatus and method for supporting IPv6 stateless address auto-configuration in a portable Internet, and to a computer readable recording medium recording a program for realizing the method. In more detail, when communicating in a point-to-multipoint (PMP) mode between a terminal and a base station (BS) over IEEE 802.16, an apparatus supporting IPv6 stateless address autoconfiguration; A method and a computer readable recording medium having recorded thereon a program for realizing the method.

In the present invention, the base station apparatus BS is interpreted as a concept including a base station (RAS), a control station (ACR), and the like.

There are two main ways to set up an address on a host when IPv6 (Internet Protocol version 6) is introduced.

One is 'IPv6 stateful address auto-configuration' and the other is 'IPv6 stateless address auto-configuration'.

'IPv6 Stateful Address Autoconfiguration' is a method by which an address management server assigns an address to a host using DHCP (Dynamic Host Configuration Protocol) v6 protocol. 'IPv6 Stateless Address Autoconfiguration' is based on network information. This is how the host generates its own address.

IPv6 stateless address autoconfiguration has two types of message exchange procedures.

One is when the host first receives a Router Advertisement (RA) message from the Router when address generation starts. The network address extracted from the Router Advertisement message and the MAC recorded in the interface of the host After creating an IPv6 address based on an Access Controller (ADC) address, Duplicated Address Detection (DAD) is used to determine whether this address is being used by another host in the network managed by the router. NAD (Neighbor Solicitation) and NA (Neighbor Advertisement) messages are exchanged between hosts for this address redundancy check. In the case of NS messages, Layer 3 multicast to all hosts on the same link with the same MAC address. The NA message is forwarded to Layer 3 multicast, which indicates that hosts with duplicate addresses already use this address to all nodes on the same link.

On the other hand, the other type of message exchange process is that the host does not receive a Router Advertisement (RA) message from the router at the beginning of address generation, leading to Router Solicitation (RS), Router Advertisement (RA), and Address Duplicate Checking (DAD). Form. At this time, the router extraction (RS) message is delivered in Layer 3 multicast delivered to all routers of the network to which the host is connected.

However, in the IPv6 protocol, since only messages exchanged in Layer 3 or higher are defined, there is a problem in the IEEE 802.16 PMP mode in which it is difficult to map Layer 3 multicast to Layer 2 multicast. Looking at this in detail.

In IEEE 802.16, there are largely 'Mesh mode' and 'PMP mode' for communicating in the wireless section. In particular, in the 'PMP mode', the terminal may communicate only with the base station apparatus (BS). Accordingly, the terminal may transmit information to the BS in the form of Layer 2 unicast, and the BS may transmit the information to the terminals in unicast or multicast form. When the IEEE 802.16 PMP mode is used, address duplication check (DAD) is IEEE 802.16 because Layer 3 multicast, in which the packet should be delivered to terminals on the same link as NS, is transmitted from the terminal to the BS in the form of Layer 2 unicast. Due to the wireless section communication characteristics of the PMP mode, it does not operate.

That is, in the case of IPv6 stateless address autoconfiguration, the terminal generates an NS packet and delivers it directly to the terminals on the same link to check whether the generated address is used by another terminal. However, in the PMP mode of IEEE 802.16, the terminal is only connected to the BS because only the communication from the terminal to the BS is allowed. Therefore, even if the other terminal attached to the BS is using the address generated by the BS, if the BS does not perform special processing, the NS is not delivered to the terminal to check whether the address is duplicated (address duplication check (DAD)). This prevents IPv6 stateless address autoconfiguration.

The present invention has been proposed to solve the above problems, and when solving the PMP mode between the terminal and the base station device (BS) in IEEE 802.16, IPv6 stateless main device configuration does not work correctly to solve the problem It is an object of the present invention to provide an apparatus for supporting IPv6 stateless address autoconfiguration using a proxy, a method thereof, and a computer-readable recording medium having recorded thereon a program for realizing the method.

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.

According to an aspect of the present invention, there is provided an apparatus for supporting IPv6 stateless address autoconfiguration in a portable Internet, comprising: storage means for storing terminal information; NS determination means for distinguishing an NS (Neighbor Solicitation) packet transmitted from one terminal to other terminals on the same link in automatic IPv6 stateless address automatic configuration; And as it is determined that the packet is an NS packet, it is determined whether the terminal corresponding to the destination IPv6 multicast address of the NS packet exists based on the terminal information, and NA (Neighbor Advertisement) as a proxy of the terminal based on the information of the terminal. ) Generating a packet and including proxy means for delivering the NA packet to the other terminal.

In addition, the present invention is characterized in that it further comprises means for processing packets other than NS packets according to a known packet processing scheme.

Meanwhile, the present invention provides a method for supporting IPv6 stateless address autoconfiguration in a portable Internet, wherein when a packet is received, the received packet is transmitted from one terminal to another terminal on the same link for IPv6 stateless address automatic configuration. A first checking step of confirming whether the packet is a neighbor solicitation (NS) packet delivered to the client; A second checking step of confirming whether a terminal corresponding to a destination IPv6 multicast address of the NS packet exists based on previously stored terminal information according to the first checking result as the NS packet; And a proxy step of generating a NA (Neighbor Advertisement) packet as a proxy of the terminal based on the information of the terminal when the corresponding terminal exists as a result of the second check, and delivering the NA packet to the other terminal. Characterized in that comprises a.

The present invention may further include discarding the NS packet when there is no terminal corresponding to the destination IPv6 multicast address of the NS packet.

In addition, the present invention is characterized in that it further comprises the step of processing a packet other than the NS packet according to a known packet processing method, as a result of the first confirmation.

On the other hand, in order to support IPv6 stateless address autoconfiguration in a network using IEEE 802.16 Point-to-MultiPoint (PMP) mode as a wireless communication method, a base station apparatus (BS) equipped with a processor may receive a packet when receiving a packet. A first acknowledgment function for confirming whether the received packet is an NS (Neighbor Solicitation) packet transmitted from one terminal to other terminals on the same link for IPv6 stateless address autoconfiguration; A second identification function for confirming whether a terminal corresponding to a destination IPv6 multicast address of the NS packet exists based on pre-stored terminal information according to the first identification result; And a proxy function for generating a NA (Neighbor Advertisement) packet as a proxy of the terminal based on the information of the terminal, and transmitting the NA packet to the other terminal when the corresponding terminal exists as a result of the second verification. A computer readable recording medium having recorded thereon a program for realizing the present invention is provided.

The present invention is to support IPv6 stateless address autoconfiguration using proxy on IEEE 802.16. In a network using IEEE 802.16 PMP mode as a wireless communication method and IPv4 as an address system, such as mobile Internet, When the IPv6 addressing system is introduced, the address duplication check (DAD) response is transmitted on behalf of terminals managed by the base station device (BS) so that the IPv6 stateless address autoconfiguration function can work properly. ) In the form of.

To this end, the present invention, when receiving the NS from the terminal on the basis of the information of the terminal can be known in the BS acts as a proxy (Proxy) to replace the terminals of the network it manages to generate a NA message to form a Layer2 unicast form In response, the IPv6 stateless address autoconfiguration is performed.

According to the present invention, by adding a function to the BS in a network using the IEEE 802.16 PMP mode, it is possible to support to perform IPv6 stateless address autoconfiguration.

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 an exemplary configuration diagram of a portable Internet to which the present invention is applied, and is an exemplary configuration diagram of a network using the IEEE 802.16 PMP mode as a wireless communication method.

As shown in FIG. 1, in a network using the IEEE 802.16 PMP mode to which the present invention is applied as a wireless communication method, a router (packet) is transmitted when a packet is delivered to a terminal (IEEE 802.16 portable terminal) 10-1 from outside a wireless access network. AR is transmitted to a base station apparatus (base station (RAS), control station (ACR), etc.) (BS) 11 through an access router (12), and the base station apparatus (BS) 12 is a terminal 10-1. Deliver the packet to

If the terminal (IEEE 802.16 portable terminal) (10-2) is connected to the network to perform IPv6 stateless address autoconfiguration, the terminal 10-1 on the same link by transmitting an IPv6 NS message Make sure you use the address you created. At this time, the IPv6 NS message should be delivered to the terminal 10-1 on the same link as a multicast packet. However, since the IPv6 NS message uses the IEEE 802.16 PMP mode as a wireless communication method, the IPv6 NS message is always transmitted through the base station apparatus (BS) 12. 10-1). Therefore, if no special processing is performed in the base station apparatus (BS) 12, NS, which is a multicast packet in the link range, is discarded and the automatic address setting fails.

Accordingly, in the present invention, when the base station apparatus (BS) 12 receives NS from the terminal 10-2 based on the terminal information, the base station apparatus (BS) 12 operates as a proxy to replace the terminals of the network managed by the NA. By generating a message and responding in the form of Layer2 unicast, IPv6 stateless address autoconfiguration is performed.

FIG. 2 is a configuration diagram of an apparatus for supporting IPv6 stateless address autoconfiguration according to the present invention, and shows a configuration of a base station apparatus (BS) 12 functioning as a proxy of a terminal to an IPv6 NS message. .

As shown in Fig. 2, the apparatus (base station apparatus (BS) 12) supporting the IPv6 stateless address automatic setting according to the present invention includes terminal information (information for determining the terminal (the MAC address of the terminal, IP address of the terminal, etc.), the terminal information storage unit 24 storing the authentication information used to communicate with the BS and the radio resource information (such as the CID of the terminal, etc.), and the IPv6 stateless address. In automatic configuration, NS for distinguishing a NS (Neighbor Solicitation) packet transmitted from a terminal (for example, 10-2 of FIG. 1) to other terminals on the same link (for example, 10-1 of FIG. 1). As the determination unit 21 and the NS packet is confirmed, it is determined whether the terminal corresponding to the destination IPv6 multicast address of the NS packet exists based on the terminal information, and information of the terminal (that is, information for determining the terminal (terminal) MAC address of the terminal, IP address of the terminal, etc.) and a proxy function processing unit 23 for generating a NA (Neighbor Advertisement) packet as oxy) and delivering the NA packet to another terminal (for example, 10-1 of FIG. 1). The apparatus further includes a BS function processing unit 22 for processing packets other than the NS packet according to a known packet processing method (according to the existing BS processing method).

Here, the proxy function processing unit 23 searches the terminal information storage unit 24 for the packet determined to be NS and checks whether there is a terminal corresponding to the destination multicast address, and uses the terminal information as a proxy of the terminal. Generates a NA packet and delivers it to the terminal. However, as it is confirmed that the packet is NS, it is checked whether there is a terminal corresponding to the destination IPv6 multicast address of the NS packet based on the terminal information, and if the terminal does not exist, the NS packet is discarded.

3 is a flowchart illustrating a method for supporting IPv6 stateless address autoconfiguration according to the present invention, and illustrates a packet processing procedure for supporting IPv6 stateless address autoconfiguration in a base station apparatus (BS). .

First, if a packet is received from one terminal (for example, 10-2 of FIG. 1) (301), it is checked whether the packet is an IPv6 NS packet (302).

As a result of the check (302), if it is not the NS packet, the BS processes it like a normal packet (303).

As a result of the check 302, if it is an NS packet, the terminal information corresponding to the destination IPv6 multicast address of the packet may be determined by checking information of the terminal (for example, the MAC address of the terminal, the IP address of the terminal, etc.) known to the BS (e. For example, it is checked whether 10-1 of FIG. 1 exists (304).

As a result of the check 304, if the corresponding terminal does not exist (305), the packet is discarded (discarded) (306), and if the corresponding terminal exists, a NA packet is generated based on the information of the terminal and the corresponding terminal (for example, , 10-1 of FIG. 1).

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.

The present invention as described above, supports the operation of the IPv6 stateless address automatic configuration of the terminal in the network using the IEEE 802.16 PMP mode in a wireless communication method, and can reduce the communication in the wireless communication interval to reduce the radio resources There is a saving effect.

Claims (10)

In a device that supports IPv6 stateless address autoconfiguration in the portable Internet, Storage means for storing terminal information; NS determination means for distinguishing an NS (Neighbor Solicitation) packet transmitted from one terminal to other terminals on the same link in automatic IPv6 stateless address automatic configuration; And As it is confirmed that the packet is an NS packet, it is determined whether a terminal corresponding to the destination IPv6 multicast address of the NS packet exists based on the terminal information, and NA (Neighbor Advertisement) as a proxy of the terminal based on the information of the terminal. Proxy means for generating a packet and delivering the NA packet to the other terminal Device that supports IPv6 stateless address autoconfiguration in the mobile Internet, including. The method of claim 1, The proxy means, As it is confirmed that the packet is an NS packet, on the basis of the terminal information to determine whether there is a terminal corresponding to the destination IPv6 multicast address of the NS packet, if the terminal does not exist, characterized in that the portable cell discards Devices that support IPv6 stateless address autoconfiguration on the Internet. The method according to claim 1 or 2, Means for processing a packet other than the NS packet according to a known packet processing scheme A device that supports IPv6 stateless address autoconfiguration on a mobile Internet further comprising. The method of claim 3, wherein The mobile Internet, Device supporting IPv6 stateless address autoconfiguration in a portable Internet, characterized in that the terminal and the base station device (BS) in the IEEE 802.16 communication in a point-to-multipoint (PMP) mode. The method of claim 4, wherein The base station apparatus (BS), In a network using the IEEE 802.16 PMP mode as a wireless communication method, a device supporting IPv6 stateless address autoconfiguration in a portable Internet, characterized in that to perform a proxy function of the terminal for IPv6 NS packets. In a method for supporting IPv6 stateless address autoconfiguration in the portable Internet, A first acknowledgment step of confirming whether the received packet is an NS (Neighbor Solicitation) packet transmitted from one terminal to other terminals on the same link for IPv6 stateless address automatic configuration; A second checking step of confirming whether a terminal corresponding to a destination IPv6 multicast address of the NS packet exists based on previously stored terminal information according to the first checking result as the NS packet; And As a result of the second check, if the corresponding terminal exists, a proxy step of generating a NA (Neighbor Advertisement) packet as a proxy of the terminal based on the information of the terminal, and forwarding the NA packet to the other terminal. How to support IPv6 stateless address autoconfiguration in the mobile Internet, including. The method of claim 6, Discarding the NS packet when there is no terminal corresponding to the destination IPv6 multicast address of the NS packet as a result of the second verification; How to support IPv6 stateless address autoconfiguration on a mobile Internet further comprising. The method according to claim 6 or 7, Processing a packet other than an NS packet according to a known packet processing scheme as a result of the first verification; How to support IPv6 stateless address autoconfiguration on a mobile Internet further comprising. The method of claim 8, The pre-stored terminal information, A portable device comprising information for identifying the terminal (terminal MAC address, terminal IP address), authentication information used for the terminal to communicate with the base station apparatus (BS), and radio resource information (terminal CID) being used. How to support IPv6 stateless address autoconfiguration on the Internet. In a base station apparatus (BS) equipped with a processor to support IPv6 stateless address autoconfiguration in a network using IEEE 802.16 Point-to-MultiPoint (PMP) mode as a wireless communication method, A first acknowledgment function for confirming whether the received packet is an NS (Neighbor Solicitation) packet transmitted from one terminal to other terminals on the same link for IPv6 stateless address automatic configuration; A second identification function for confirming whether a terminal corresponding to a destination IPv6 multicast address of the NS packet exists based on previously stored terminal information according to the first identification result; And As a result of the second check, if the corresponding terminal exists, a proxy function of generating a NA (Neighbor Advertisement) packet as a proxy of the terminal based on the information of the terminal, and delivering the NA packet to the other terminal. A computer-readable recording medium having recorded thereon a program for realizing this.

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