KR101221596B1 - Mobile terminal and method for notifying ip address to access router in wireless network - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a wireless network, and more particularly, to a portable terminal for announcing an IP address to an access router in a wireless network in which a reliable Internet Protocol version 6 (IPv6) address can be automatically set and used. And a method is disclosed. According to an aspect of the present invention, there is provided a method for a mobile terminal to announce an IP address to an access router by performing a duplicate address detection (DAD) on an automatically set IP address, and a notification message including the IP address according to a result of performing the DAD. And transmitting a notification message to the access router, wherein the portable terminal uses the IP address according to whether to respond to a notification message sent to the access router after performing the DAD.

Wireless network, IPv6, access router, duplicate address detection (DAD), neighbor solicitation (NS) message, neighbor advertisement message (NA), address cache

Description

Mobile terminal and method for advertising IP address to access router in wireless network {MOBILE TERMINAL AND METHOD FOR NOTIFYING IP ADDRESS TO ACCESS ROUTER IN WIRELESS NETWORK}

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

2 is a flowchart illustrating a method for a mobile terminal to announce an IP address to an access router in a wireless network according to an embodiment of the present invention.

3 is an exemplary diagram for describing a format of a notification message according to an embodiment of the present invention.

4 is an exemplary diagram for describing a format of an approval message according to an embodiment of the present invention.

5 is a block diagram illustrating a portable terminal for announcing an IP address to an access router in a wireless network according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: wireless network

110: access router

120: base station

130, 500: mobile terminal

510: detection unit

520: control unit

530: transceiver

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a wireless network, and more particularly, to a portable terminal for announcing an IP address to an access router in a wireless network in which a reliable Internet Protocol version 6 (IPv6) address can be automatically set and used. And to a method.

In general, IPv4-based networks have been used for data communication between mobile terminals and communication nodes in wired and wireless communication networks. Because IPv4 is a 32-bit address system, IPv4-based networks are running out of addresses that can be assigned as Internet usage increases. To this end, the Internet Engineering Task Force (IETF) has standardized on IPv6 using a 128-bit addressing scheme.

As this increase in IP addressing scheme makes it difficult for users to manually set IP addresses, efforts must be made to automatically assign IP addresses through interaction between mobile terminals and communication nodes in IPv6-based networks. do.

IPv6 addresses are largely assigned to mobile terminals by the following three methods. That is, 1) a static configuration method of manually setting network information in each host, and 2) a dynamic configuration of providing network information to a host using a network protocol such as DHCP (Dynamic Host Configuration) upon request. Dynamic Configuration) method, and 3) Automatic Configuration methods for setting network information according to a policy set according to an appointment among all hosts on a network.

The dynamic configuration method is also called statefull auto-configuration method, which uses a server such as DHCP to obtain an address. When the host side requests an address from a DHCP server, one of the server-assignable addresses is assigned to the host side. To assign. Therefore, the server must have a large database and strict management is required.

The autoconfiguration method is also called a stateless auto-configuration method in which the host generates its own address. The host generates its own address, that is, its interface ID information and the prefix information obtained from the router, or This is to generate an address using known prefix information. Thus, the host is responsible for creating and assigning its own address.

However, because the access router must manage all IP addresses used by the mobile terminal on the network, even if the mobile terminal automatically sets the IP address itself, problems may occur in network operation if the access router does not know the automatically set IP address. have.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and in order to automatically set and use a reliable Internet Protocol version 6 (IPv6) address, a mobile terminal automatically sets and automatically sets an IPv6 address. It is an object of the present invention to provide a mobile terminal and method for allocating an IP address to an access router in a wireless network that can be assigned to an interface after being sent to the public.

In order to achieve the above object, a method for a mobile terminal to announce an IP address to an access router according to an embodiment of the present invention includes performing a DAD (Duplicate Address Detection) for the automatically set IP address, and performing the DAD And sending a notification message including the IP address to the access router according to a result, wherein the portable terminal determines whether the mobile terminal responds to the notification message sent to the access router after performing the DAD. It is characterized by using an IP address.

In order to achieve the above object, a portable terminal for reporting an Internet Protocol (IP) address to an access router according to an embodiment of the present invention is a detection unit for performing DAD (Duplicate Address Detection) for an automatically set IP address. And a control unit for transmitting a notification message including the IP address to the access router according to a result of performing the DAD, wherein the portable terminal responds to the notification message sent to the access router after performing the DAD. It is characterized by using the IP address depending on whether or not.

Hereinafter, with reference to the accompanying drawings and the contents described in the accompanying drawings will be described in detail preferred embodiments of the present invention, but the present invention is not limited or restricted by the embodiments. Like reference symbols in the drawings denote like elements.

A portable terminal for announcing an Internet Protocol (IP) address in an access router according to the present invention is a mobile communication terminal, a public switched telephone network (PSTN) terminal, VoIP, SIP, Megaco, Personal Digital Assistant (PDA), cellular Phone, Personal Communication Service (PCS) Phone, Hand-Held PC, CDMA-2000 (1X, 3X) Phone, Wideband CDMA Phone, Dual Band / Dual Mode Phone , Global Standard for Mobile (GSM) phone, Mobile Broadband System (MBS) phone, and satellite / terrestrial digital multimedia broadcasting (DMB) phone.

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

As shown in FIG. 1, an IPv6-based wireless network 100 according to an embodiment of the present invention includes an access router 110, a base station 120, and It may include a mobile terminal (130).

The mobile terminal 130 may automatically generate an IP address and perform DAD (Duplicate Address Detection) on the generated IP address through the base station 120. The mobile terminal 130 may notify the access router 110 by sending a notification message including the IP address automatically generated according to the result of the DAD. When the mobile terminal 130 receives the acknowledgment message that is a response to the notification message, the mobile terminal 130 may legitimately use the automatically set IP address.

The base station 120 may generate a request message for requesting the DAD for the automatically generated IP address according to the request of the mobile terminal 130 and broadcast the generated request message. The base station 120 determines whether the IP address is collided by checking whether a response message, which is a response to the request message, is received, and then notifies the portable terminal 130 of the determination result.

When the access router 110 receives the notification message, the access router 110 may check whether the IP address included in the received notification message exists in the address cache managed by the access router 110. If the IP address does not exist in the address cache, the access router 110 may store the IP address in the address cache and transmit an acknowledgment message to the portable terminal 130 in response to the notification message.

2 is a flowchart illustrating a method for a mobile terminal to announce an IP address to an access router in a wireless network according to an embodiment of the present invention.

As shown in FIG. 2, in a wireless network according to an embodiment of the present invention, a method for a mobile terminal to announce an IP address to an access router may include automatically generating an IP address (S210) and a duplicate address detection (DAD). Performing step (S220), transmitting a notification message (S230), receiving an approval message (S240), and using the IP address legitimately (S250).

In the wireless network according to an embodiment of the present invention, the method for the mobile terminal to announce the IP address to the access router will be described in detail as follows.

First, the mobile terminal 130 may automatically generate an IP address (S210) and perform DAD (Duplicate Address Detection) on the generated IP address (S220). For example, the mobile terminal 130 may automatically generate an IP address based on the IPv6 address scheme and request the base station 120 for a DAD for the automatically generated IP address. The base station 120 may generate a request message for requesting a DAD for the IP address and broadcast the generated request message.

The base station 120 may determine whether an IP address is collided by checking whether a response message, which is a response to the request message, is received, and notify the portable terminal 130 of the determination result.

The mobile terminal 130 may transmit a notification message including the IP address, which is automatically generated according to the result of the DAD, to the access router 110 to notify the user (S230). That is, if there is no other portable terminal using the same IP address as the automatically generated IP address, the portable terminal 130 may transmit a notification message including the IP address to the access router 110.

In addition, the portable terminal 130 may use the received message, which is a response to the notification message sent to the access router 110, instead of immediately using the automatically generated IP address after performing the DAD.

On the other hand, if there is another portable terminal using the same IP address as the automatically set IP address, the portable terminal 130 may discard the automatically set IP address. Here, the announcement message may include an Internet Control Message Protocol version 6 (ICMPv6) Neighbor Solicitation (NS) message defined in the neighbor discovery protocol for IPv6. The format of the announcement message will be described with reference to FIG. 3.

3 is an exemplary diagram for describing a format of a notification message according to an embodiment of the present invention.

As shown in FIG. 3, a notification message according to an embodiment of the present invention may include an IP header and an ICMPv6 NS message. An ICMPv6 NS message may include a type field indicating a type of a message and a code indicating a type of a message. Field, a checksum field for performing checksum calculation, a reserved field that is not used, a target address field for a target IP address of a message, and an option field for an option.

For example, the mobile terminal 130 may generate a notification message including an IP header and an ICMPv6 NS message and transmit the generated notification message to the access router 110. That is, the notification message may have a plurality of address fields. The IP address of the access router 110 may be included in the destination address field, the automatically generated IP address may be included in the source address field, and the IP address of the access router 110 may be included in the target address field. In the address and the source link-layer address field, a link-layer address of the mobile terminal 110 may be set.

In this case, since the access router 110 may store and manage IP addresses set in the plurality of portable terminals in an address cache, when the notification message is received, the access router 110 manages the IP address included in the received notification message. You can check whether it exists in the address cache. That is, if the IP address does not exist in the address cache, the access router 110 may store the IP address in the address cache, and transmit the acknowledgment message, which is a response to the notification message, to the mobile terminal 130. Here, the grant message may include an Internet Control Message Protocol version 6 (ICMPv6) NA (Neighbor Advertisement) message defined in the neighbor discovery protocol for IPv6. The format of the grant message will be described with reference to FIG.

4 is an exemplary diagram for describing a format of an approval message according to an embodiment of the present invention.

As shown in FIG. 4, the acknowledgment message according to an embodiment of the present invention includes an IP header and an ICMPv6 NA message. The ICMPv6 NA message includes a type field indicating a type of a message, a code field indicating a type of a message, A checksum field for checksum calculation, an R field to indicate that the sender is an access router, an S field to indicate that it is a response to an NS message, an O field to indicate that an existing cache entry should be overridden, an unused reserve Code field, a target address field for a target IP address of a message, and an option field for an option.

For example, the access router 110 may generate an acknowledgment message including an IP header and an ICMPv6 NA message and transmit the generated acknowledgment message to the mobile terminal 130. That is, the acknowledgment message may have a plurality of address fields, the automatically generated IP address in the destination address field, the IP address of the access router 110 in the source address field, and the IP of the access router 110 in the target address field. The address and the source link-layer address field may set a link-layer address of the access router 110.

On the other hand, access router 110 does not perform any action if an IP address is present in the address cache.

Thereafter, the mobile terminal 130 checks whether an approval message, which is a response to the notification message, is received (S240). That is, after transmitting the notification message, the mobile terminal 130 may check whether the approval message is received in response to the notification message for a preset time, for example, reflecting the network state.

As a result, the mobile terminal 130 may legitimately use the automatically generated IP address according to whether the approval message is received. That is, the mobile terminal 130 may use the IP address legitimately when receiving the approval message, and discard the IP address when not receiving the approval message.

In addition, when the mobile terminal 130 does not receive the acknowledgment message, the notification message is repeatedly transmitted as many times as a preset number of times, for example, reflecting the network state, and if the acknowledgment message is not received as a result of the transmission, the IP address. Can be discarded.

5 is a block diagram illustrating a portable terminal for announcing an IP address to an access router in a wireless network according to an embodiment of the present invention.

As illustrated in FIG. 5, in the wireless network according to an embodiment of the present invention, the portable terminal 500 for notifying an IP address to an access router includes a detector 510, a controller 520, and a transceiver 530. It may include.

The detector 510 may perform DAD (Duplicate Address Detection) for the automatically set IP address. That is, the detector 510 may request the base station to perform the DAD and provide the requested result of the DAD to the controller 520.

The controller 520 may generate a notification message including an automatically generated IP address according to a result of the DAD, and transmit the generated notification message to the access router through the transceiver 530 to notify. That is, if there is no other mobile terminal using the same IP address as the IP address, the controller 520 transmits a notification message including the IP address to the access router and announces the message, and uses the other mobile terminal using the same IP address as the IP address. If present, the IP address can be discarded.

In addition, the controller 520 may legitimately use the IP address when receiving the approval message from the transceiver 530, and discard the IP address when not receiving the approval message.

The transceiver 530 receives a notification message from the controller 520 and transmits the input notification message to the access router to receive an acknowledgment message that is a response to the transmitted notification message. Here, the controller 520 may receive an approval message from the transceiver 530 and determine whether to use an IP address according to whether the approval message is input.

An embodiment of the present invention may include a computer readable medium including program instructions for performing various computer-implemented operations. The computer readable medium may include program instructions, local data files, local data structures, or the like, alone or in combination. The media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical recording media such as CD-ROMs, DVDs, magnetic-optical media such as floppy disks, and ROM, RAM, flash memory, and the like. Hardware devices specifically configured to store and execute the same program instructions are included. Examples of program instructions may include machine language code such as those generated by a compiler, as well as high-level language code that may be executed by a computer using an interpreter or the like.

Although specific embodiments of the present invention have been described so far, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

As can be seen from the above description, in the wireless network according to an embodiment of the present invention, a mobile terminal and a method for announcing an IP address to an access router are provided by the mobile terminal to automatically obtain an IPv6 address. By setting and transmitting the automatically set IPv6 address to the access router and using it after being notified, there is an effect of automatically setting and using a reliable IPv6 address.

Claims (18)

A method for a mobile terminal to announce an Internet Protocol (IP) address to an access router, the method comprising: Performing duplicate address detection (DAD) on an automatically configured IP address; And Transmitting a notification message including the IP address to the access router according to a result of performing the DAD. Confirming whether or not to receive an acknowledgment message in response to the transmitted notification message; Upon receipt of the grant message, legitimately using the IP address; And If the acknowledgment message is not received, repeatedly transmitting the notification message a predetermined number of times, and discarding the IP address if the acknowledgment message is not received as a result of the transmission. Including, And the portable terminal uses the IP address according to whether to respond to a notification message sent to the access router after performing the DAD. The method according to claim 1, The known step, If there is no other portable terminal using the same IP address as the IP address, sending the notification message including the IP address to the access router; And If there is another portable terminal using the same IP address as the IP address, discarding the IP address. IP address notification method characterized in that. The method according to claim 1, The notification message, Containing neighbor solicitation (NS) messages defined by neighbor discovery protocol for IPv6 IP address notification method characterized in that. delete The method according to claim 1, The approval message is, Containing NA (Neighbor Advertisement) messages defined in neighbor discovery protocol for IPv6 IP address notification method characterized in that. delete delete The method according to claim 1, In the above known step, The access router checks whether an IP address included in the notification message exists in an address cache managed by the access router, and if the IP address does not exist, storing the IP address in the address cache and transmitting the acknowledgment message. IP address notification method characterized in that. A computer-readable recording medium having recorded thereon a program for executing the method of any one of claims 1, 2, 3, 5 or 8. A mobile terminal for advertising an Internet Protocol (IP) address to an access router, A detector for performing Duplicate Address Detection (DAD) on an automatically set IP address; A controller configured to generate a notification message including the IP address according to a result of performing the DAD of the detector; And A transmission / reception unit receiving the notification message from the controller, transmitting the input notification message to the access router, and receiving an acknowledgment message that is a response to the transmitted notification message. Including, The mobile terminal uses the IP address according to whether to respond to a notification message sent to the access router after performing the DAD. The control unit, If the approval message is received, the IP address is used. If the approval message is not received, the notification message is repeatedly transmitted a predetermined number of times through the transceiver, and if the transmission result is not received, the IP is received. And a discarding address. The method of claim 10, The control unit, If there is no other mobile terminal using the same IP address as the IP address, the notification message including the IP address is transmitted to the access router through the transceiver to be notified. Discarding the IP address if there is another portable terminal using the same IP address as the IP address The mobile terminal comprising: The method of claim 10, The notification message, Containing neighbor solicitation (NS) messages defined by neighbor discovery protocol for IPv6 The mobile terminal comprising: delete The method of claim 10, The approval message is, Containing NA (Neighbor Advertisement) messages defined in neighbor discovery protocol for IPv6 The mobile terminal comprising: delete delete The method of claim 10, When the control unit sends the notification message to the access router and announces, the access router checks whether an IP address included in the transmitted notification message exists in an address cache managed by the controller, and if the IP address does not exist, Storing an IP address in the address cache and sending the acknowledgment message The mobile terminal comprising: The method of claim 10, The mobile terminal, Mobile communication terminals, Public Switched Telephone Network (PSTN) terminals, VoIP, SIP, Megaco, Personal Digital Assistant (PDA), cellular phones, Personal Communication Service (PCS) phones, Hand-Held PCs, CDMA-2000 (1X, 3X) phones, Wideband CDMA (WCDMA) phones, Dual Band / Dual Mode phones, Global Standard for Mobile (GSM) phones, Mobile Broadband System (MBS) phones, and satellite / terrestrial DMB One of the (Digital Multimedia Broadcasting) phones The mobile terminal comprising:

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