JP2003318943A - Ip address generating method and wireless base station apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a time required for address duplicate inspection in the case that an IP address for a terminal is automatically generated. <P>SOLUTION: When a network apparatus 120 is connected to a network 100, the network apparatus 120 automatically generates an IP address and executes duplicate inspection for the generated address. Further, a base station apparatus 110 acquires a result of IP address duplicate inspection by referencing an IP address database 112 in response to an IP address inspection request by the network apparatus 120 and informs the network apparatus 120 about the result so as to reduce the time for assuring the uniqueness of the IP address. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of generating an IP address and a wireless base station device in a network using Internet Protocol (IP) as a communication procedure.

[0002]

2. Description of the Related Art Internet Protocol Version 6 (IPv6) has been developed as an Internet protocol in which the address space is expanded and packet routing is made more efficient.
6) can be given.

In IPv6, a network device newly connected to the network generates a link local IP address valid only in the link local network from the device unique ID and the like, and uses the link local IP address in the network. An ID (subnet prefix) unique to the link local network can be obtained by communicating with the router. Furthermore, it is possible to generate a valid global IP address for the entire large-scale network from the subnet prefix and the device-specific ID.

[0004]

[Problems to be Solved by the Invention] IPv6 as described above
Then, it is essential to ensure the uniqueness of the link local and global IP addresses automatically generated by the network device. Therefore, in the network device newly connected to the network, the automatically generated duplication check packet of the link local and global IP addresses is sent to the network, and when there is the duplication of the IP address, the reply packet to the investigation packet is received. To detect duplicates.

If no reply packet is received within a certain period of time after sending the duplicate check packet, there is no duplication of the IP address and the uniqueness of the automatically generated IP address is secured.

However, the above method has a problem in that the network device newly connected to the network cannot perform communication for a certain period of time after the connection due to the duplication check.

It is an object of the present invention to reduce the communication interruption time due to the IP address duplication check time when connecting a network device to a new network.

[0008]

In order to solve this problem, the present invention provides a network device that manages and controls an IP network such as a router, and an IP address from a network device newly connected to the network. When the duplicate check packet is received, the duplicate check result is sent to the duplicate check packet sender, and in the network device newly connected to the network,
By receiving an IP address duplication check result packet from a network device such as a router, the generated IP address duplication check result can be determined without waiting for a certain period of time.

Further, in a wireless network device, it is necessary to establish a wireless path in the media access control unit before establishing a communication path using the Internet Protocol (IP). Therefore, during this wireless path establishment processing, the duplication inspection processing in the network device can be omitted by notifying the duplication inspection result of the IP address of the network device newly connected to the network.

As a result, in the network device using IPv6, it is possible to reduce the occurrence of communication interruption time due to the IP address duplication check when the device is newly connected to the network.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION In the invention described in claim 1 of the present invention, an internet protocol (IP) is used as a communication procedure.
In the method of generating an IP address of a network terminal using, the IP address is automatically generated, and the fact that the generated IP address does not overlap is received from the control station of the network. The IP address is automatically generated. However, the uniqueness of the generated IP address can be ensured by checking that the generated IP addresses do not overlap.

According to a second aspect of the present invention, in the IP address generation method according to the first aspect, the IP address duplication check sends a packet for automatically checking the duplication of the IP address, and the duplication check result is displayed. It is characterized in that it is received from the control station of the network, in order to ensure the uniqueness of the IP address generated by sending the duplicate check packet of the IP address to the network and receiving the duplicate check result from the control station of the network. The time can be shortened.

According to a third aspect of the present invention, in a device for generating an IP address of a network device that uses Internet Protocol (IP) as a communication procedure, only when a local link is physically connected when the device is connected to a network. And a means for automatically receiving a link check result of the generated link local IP address from a control station of the network. The time for ensuring the uniqueness of the local IP address can be shortened.

According to a fourth aspect of the present invention, in an IP address generating device of a network device that uses the Internet Protocol (IP) as a communication procedure, when connected to a network, only within a physically connected local link. The present invention comprises means for automatically generating a valid link local IP address, means for transmitting a packet for performing duplication check of the generated link local IP address, and means for receiving the duplication check result from the control station of the network. Therefore, it is possible to shorten the time for ensuring the uniqueness of the generated link local IP address.

According to a fifth aspect of the present invention, in a device for generating an IP address of a network device that uses the Internet Protocol (IP) as a communication procedure, when connected to the network, the global effective global entire network is effective. The present invention is characterized by having means for automatically generating an IP address and means for receiving a duplicate check result of the generated global IP address from a control station of a network, and the uniqueness of the generated global IP address. The time for securing can be shortened.

According to a sixth aspect of the present invention, in a device for generating an IP address of a network device that uses Internet Protocol (IP) as a communication procedure, a global IP that is effective in the entire large-scale network when connected to the network. The present invention is characterized by having means for automatically generating an address, means for transmitting a packet for checking the generated global IP address for duplication, and means for receiving a result of the duplication check from a control station of a network. It is possible to shorten the time for ensuring the uniqueness of the global IP address generated by.

The invention described in claim 7 is a network device comprising any one or a plurality of the IP address generation devices according to any one of claims 3 to 6,
In this device, the time for ensuring the uniqueness of the IP address generated by the device can be shortened.

The invention according to claim 8 is the network device according to claim 7, wherein in a network that uses Internet Protocol (IP) as a communication procedure, a duplicate check is performed on the IP address of another device connected to the network. Is performed and the inspection result is sent to the corresponding device, whereby the time for ensuring the uniqueness of the IP address in the other device connected to the network can be shortened.

According to a ninth aspect of the invention, in the network device according to the eighth aspect, the IP addresses of all the network devices connected to the link local network are recorded in the address database, and the network device is newly connected to the network. The duplication check of the IP address of the network device is performed by referring to the address database, thereby shortening the time taken for the duplication check of the IP address of the network device newly connected to the network in this network device. be able to.

According to a tenth aspect of the present invention, in the network device according to the ninth aspect, when an IP address duplication check packet is received from a device connected to the network, all the network devices connected to the link local network are received. The IP address duplication check is performed by referring to the address database in which the IP address of the device is recorded, and the inspection result is sent to the corresponding device, whereby the duplication check time of the IP address in this device and the duplication check are performed. The time for ensuring the uniqueness of the IP address of the device that sent the packet can be shortened.

According to an eleventh aspect of the present invention, in the network device according to the ninth aspect, the packet transmitted from the device connected to the network is received, and the packet source IP address and the link local network are connected. The IP address duplication check is performed by comparing the address databases in which the IP addresses of all the devices that have been registered are compared, and when the duplication is detected, the inspection result is sent to the corresponding device. It is possible to shorten the IP address duplication check time and the time for ensuring the uniqueness of the IP address of the device that sent the packet.

According to the twelfth aspect of the present invention, a packet addressed to a network device in the link local network is relayed, and when the destination device of the packet is moving to another network, the packet is transferred to the destination network. In the network device having the function to perform, the global IP address (home IP address) in the link local network from the destination network device
When receiving a request for associating a global IP address (care-of IP address) with the destination and the movement destination, I of all network devices in the link local network is received.
By referring to the address database in which the P address is recorded, the duplication check of the registration-requested home IP address is performed, whereby the time for ensuring the uniqueness of the home IP address can be shortened.

In a thirteenth aspect of the present invention, in a network device that connects to a network that uses the Internet Protocol (IP) as a communication procedure by wirelessly connecting to a base station, a connection registration request is issued to the wireless base station. And a means for receiving a notification of the result of the IP address duplication check from the wireless base station, whereby the time for ensuring the uniqueness of the IP address of the wireless network device is provided. It can be shortened.

According to the invention described in claim 14, in a wireless base station which provides a connection to a network using an Internet Protocol (IP) as a communication procedure to a registered wireless network device, a new wireless network device is provided. The present invention is characterized by comprising means for receiving a connection registration request, means for performing a duplication check of an IP address of a wireless network device in response to the connection registration request, and means for notifying the check result. The time for ensuring the uniqueness of the IP address of the wireless network device can be shortened.

In the wireless base station apparatus according to the fourteenth aspect of the present invention, the means for performing the duplicate check uses the unique ID of the wireless network apparatus in response to the connection registration request of the new wireless network apparatus. The present invention is characterized in that an IP address of a wireless network device is generated and a duplicate check is performed on the IP address, thereby shortening the time for ensuring the uniqueness of the IP address of the wireless network device. it can.

According to a sixteenth aspect of the present invention, in the radio base station apparatus according to the fourteenth aspect, the means for performing the duplicate check is for all the network apparatuses in the link local network connected regardless of wired or wireless. The present invention is characterized in that it has an address database in which an IP address is recorded, and checks a duplicate IP address of a wireless network device by referring to the address database in which the IP address is recorded in response to a connection registration request of a new wireless network device. This makes it possible to shorten the IP address duplication check time in the wireless base station device and the time for ensuring the uniqueness of the IP address of the wireless network device.

The invention according to a seventeenth aspect is the radio base station apparatus according to the fifteenth aspect, wherein the IP address duplication check is performed for all network devices in a link local network connected by wire or wireless. It has an address database in which the IP address is recorded, generates an IP address of the wireless network device from the unique ID of the wireless network device in response to a connection registration request of a new wireless network device, and refers to the address database in which the IP address is recorded. Therefore, the IP address duplication check of the wireless network device is performed, whereby the IP address duplication check time in the wireless base station device and the time for ensuring the uniqueness of the IP address of the wireless network device Can be shortened.

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is an example of a communication network system of a link local network and a plurality of network devices connected thereto according to Embodiment 1 of the present invention.

In FIG. 1, in a link local network 100 of the same segment, a control station 110 for managing network addresses and a plurality of fixed terminals 13 are provided.
0, 140, and a plurality of moving terminals 150, 160, etc. are connected. A network device 120 is newly added to the link local network 100.
Is connected, or the network device 130-
When 160 is initialized by startup or reset,
In the new network device 120, it is necessary to set an IP address for communication via the link local network 100, and the IP address is automatically generated and the IP address duplication check is performed.

FIG. 2 is a functional block diagram of the network device according to the first embodiment of the present invention.

In FIG. 2, 100 is a link local network which is the same segment to which network devices are connected, and 110 is an IP for checking duplication of IP addresses.
Address duplication check network device, 111 is an address checking unit that checks the address of an IP packet transmitted on the link local network 100, and 112 is a network device existing on the link local network 100 and a mobile device using the link local network as a home network. An address database for recording the address of the terminal in the home network, 113 is the network device 110 and the link local network 10
0 is a communication processing unit that processes a communication procedure for transmitting a packet and receiving a packet, 114 is a packet determination unit that determines the type of the received packet, and 115 is a packet generation unit that generates a packet to be transmitted. , 120 is an IP address automatic generation network device that automatically generates an IP address, 121 is an address generation unit that automatically generates an IP address, 122 is a packet generation unit that generates an IP packet, and 123 is a type of packet received from the network. A packet determination unit for controlling the communication, a communication processing unit 124 for processing a communication procedure for the network device 120 to transmit a packet to the link local network 100 and a process for receiving the packet, and 125 sets a timer, The timer processing part which notifies a timeout is shown.

The operations of the IP address automatic generation network device 120 and the IP address duplication check network device 110 configured as described above will be described.

First, the operation of the IP address automatic generation network device 120 shown in FIG. 2 will be described with reference to the flowchart of FIG.

Link local network 100 using Internet Protocol (IP) as a communication procedure
After connecting to the new network, the device 120 connected to the S is connected to the S in FIG. 3 to determine the IP address of the device.
The process is started from 31, and an appropriate IP address is first generated in S32 in FIG. In the present invention, the method of generating the IP address in S32 of FIG. 3 is not particularly specified, but the method of generating using the EUI-64 using the ID of the link layer, the method of generating based on a random number, etc. Can be considered.

After the IP address is generated in the S32 process, the process shown in FIG.
In S33, the link local network 100
It is confirmed whether or not the packet is received from, and if the packet is received, the process proceeds to S34 in FIG. 3, and if not, the process proceeds to S36 in FIG.

In S34 of FIG. 3, it is determined whether the received packet is a packet indicating that there is an IP address duplication, and if it is a packet that indicates duplication, the process returns to S32 in FIG. If the received packet is not a packet indicating that the IP address is duplicated, S in FIG.
Transition to 35.

In S35 of FIG. 3, it is determined whether the received packet is a packet indicating that there is no duplication of IP addresses, and if it is a packet indicating that there is no duplication, the process proceeds to S39 in FIG. Is determined and the process ends. If the received packet is a packet indicating that the IP addresses are duplicated, the process proceeds to S36 in FIG.

In S36 of FIG. 3, it is determined whether or not the packet requesting the duplicate check has been transmitted. If not transmitted, the process proceeds to S37 of FIG. 3, and if transmitted, S of FIG.
Transition to 38.

In S37 of FIG. 3, a packet requesting duplicate check is sent to the link local network 100, a timer is set, and the process proceeds to S33 of FIG.

In S38 of FIG. 3, it is determined whether the timer set in S37 has expired and timed out.
If it has timed out, the process proceeds to S39 in FIG.
The IP address is determined, and the process ends. If it has not timed out, the process proceeds to S33 in FIG.

As described above, the IP address automatic generation network device 120 can automatically generate an IP address that ensures uniqueness.

In FIG. 3, after it is determined in step S33 that a packet has been received, it is determined whether the received packet is a packet for notifying that there is duplication, and then a packet for notifying that there is no duplication. However, the same effect can be obtained by changing the order of this determination.

Further, in FIG. 3, after it is determined in step S33 that a packet has been received, it is determined whether the received packet is a packet for notifying that there is duplication, and then a packet for notifying that there is no duplication. It is determined whether the received packet is a packet notifying that there is duplication, a packet notifying that there is no duplication, or either of them, and in each case, the transition destination of the processing is determined. The same effect can be obtained by performing the processing of S32, S39, and S36 in FIG.

Further, in FIG. 3, after the IP address is generated in the S32 process, it is determined whether or not the packet has been received, and then it is determined whether the duplicate check request packet has been transmitted. Similar effects can be obtained even if they are replaced.

Next, the operation of the IP address duplication check network device 110 shown in FIG. 2 will be described.

IP address duplication check network device 1
After starting up or connecting to a new link local network 100, 10 investigates the address of the network device existing on the connected link local network 100 and stores it in the address database 112.

FIG. 9 shows an example of the data format of the address database 112. In FIG. 9, 900 is an address database, 911 is an ID unique to the interface of the network device 120, and 912 is the network device 1.
20 is a link local address valid only in the link local network 100, 913 is a global address valid for the entire wide area network of the network device 120, and 914 is a care-of address in the destination network when the network device 120 is a mobile terminal. Indicates.

In the example of FIG. 9, I is used as the IP address system.
Although Pv6 is used, a similar address database can be created with IPv4. Further, in the example of FIG. 9, the care-of address and the like are also stored in the address database 112 as additional information, but it is not necessary to store the addresses that are not used in the investigation of duplicate addresses.

In the present invention, the network device 12 existing on the link local network 100.
There is no stipulation on how to check the address of 0,
A method using Neighbor Solicitation can be considered.

It is also possible to update the address check not only immediately after the start-up, but also at regular intervals. Also,
The source address of the packet received by the communication processing unit 113 is sent to the address database 11 by the address checking unit 111.
As a result of referring to 2, if the address is not recorded in the address database 112, the address database 1
It is also conceivable to add to 12.

IP address duplication check network device 1
The processing when the communication processing unit 113 of 10 receives a packet from the link local network 100 will be described with reference to the flowchart of FIG.

The communication processing unit 113 receives the packet, and S
The process is started from 41. In S42, it is determined whether the received packet is a packet requesting duplicate check.
If it is a packet requesting duplicate check, go to S43,
When that is not right, it changes to S47.

In S43 of FIG. 4, the IP address duplication check is performed by extracting the IP address to be inspected from the duplication check request packet and referring to the address database 112. If the IP address to be inspected is the link local address, the link local address 9 in FIG.
The column 12 is checked, and if the IP address to be inspected is a global address, the global address 91 in FIG.
Examine column 3.

As a result of the investigation, if there is an IP address duplication, the process proceeds to S44, and if there is no duplication, the process proceeds to S45.

In S44 of FIG. 4, a packet for notifying that there is duplication addressed to the network device 120 that has transmitted the duplication check request packet is generated, and the process proceeds to S46.

In S45 of FIG. 4, a packet notifying that there is no duplication addressed to the network device 120 that has transmitted the duplication check request packet is generated, and the process proceeds to S46.

In S46 in FIG. 4, S44 or S45
The packet generated in the process is transmitted to the link local network 100, the process proceeds to S51 and the process ends.

In S47 of FIG. 4, the source IP address is extracted from the received packet and the process proceeds to S48.

In S48 in FIG. 4, it is judged from the source IP address extracted in S47 whether the network device 120 which transmitted the packet is a device connected to the link local network 100, and the network device 120 is connected to the link local network 100. If the device is a different device, the process proceeds to S49. If the device is not connected to the link local network 100, the process proceeds to S51 and ends the process.

In the S49 process of FIG. 4, the IP address extracted in the S49 process is searched by searching the address database 112.
If you are already registered, check if
The process proceeds to S51 and the process ends. If not registered, the process proceeds to S40.

In the process of S40 in FIG. 4, the IP address extracted in the process of S47 is stored in the address database 11
2 is registered, the process proceeds to S51 and the process ends.

As described above, the IP address duplication check network device 110 can promptly notify the IP address duplication check request packet of the IP address duplication check result.

(Embodiment 2) FIG. 5 shows an example of a communication network system of a home agent (HA) and a mobile terminal (MN) for supporting the movement of a mobile terminal according to Embodiment 2 of the present invention.

In FIG. 5, 200 is a wide area network (WAN) connecting a plurality of local area networks (LAN), 201 is a home network to which an HA and a MN that is not moving are connected, and 202 is away from the home network 201. A foreign network to which the MN is connected at the destination, 203 is a home agent that assists the movement of the mobile terminal, and 204 is the mobile terminal.

In the above configuration, when the mobile terminal 204 is started in a state of being connected to the foreign network 202, or after being started in a state of not being connected to any network, the foreign network 20
When connected to the mobile terminal 2, the mobile terminal 204 acquires a valid global IP address (care-of address) in the foreign network 202.

Next, the home agent 203 is requested to register the relationship between the acquired care-of address and the global IP address (home address) in the home network of the mobile terminal 204. Upon receiving the registration request, the home agent 203 receives the home address included in the registration request from the address of the network device connected to the home network 201 and the mobile terminal 2 other than the mobile terminal 204 managed by the home agent 203.
It is confirmed to the mobile terminal 204 that the home address of 04 is not duplicated, and if it is not duplicated, a reply indicating approval of the registration request is sent, and if duplicated, a reply indicating refusal of registration training is sent to the mobile terminal 204. Send.

In the present invention, the home agent 2
For the home address duplication check in No. 03, the address of the network device connected to the home network 201 prepared in the home agent 203 and the home address list of the mobile terminal 204 managed by the home agent 203 are referred to. This reduces the time taken for the home address duplication check.

According to the present embodiment described above, it is possible to shorten the processing time of the care-of address registration while ensuring the uniqueness of the home address in the IP network in which the mobile terminal can be moved.

(Embodiment 3) FIG. 6 shows an example of a radio communication network system of a radio base station and a radio mobile terminal in Embodiment 3 of the present invention.

In the figure, a wireless base station 301 is connected to an IP network 350 and provides the wireless mobile terminal 300 with access to the IP network 350.
In the figure, the IP to which the wireless base station 301 is connected
The network 350 is a wide area network,
It does not matter if it is connected to a local area network (LAN).

The registration procedure of the wireless mobile terminal 300 in the wireless base station 301 according to the third embodiment will be described below with reference to FIG.

In FIG. 7, 300 is a wireless mobile terminal, 3
01 is a wireless base station, 302 is an IP communication processing unit in the wireless mobile terminal 300, 303 is a media access control (MAC) processing unit in the wireless mobile terminal 300, 304 is a MAC processing unit in the wireless base station 301, and 305 is a wireless base station. In the IP communication processing unit, 310 to 314 are messages for performing IP address registration processing between the processing units, and 315 is an IP session after the registration processing is completed.

When the wireless mobile terminal 300 confirms the existence of a wireless base station by a beacon frame not shown in the figure, a signal from the control channel, etc., the wireless mobile terminal 300 determines the IP address for communication through the wireless base station 301. Perform the registration process.

The wireless mobile terminal 300 first sends a registration request message 310 from the MAC processing unit 303. An example of the registration request message 310 is shown in FIG. Figure 8 IE
This is an example of a management frame in the EE 802.11 standard, and FrameControl 801 indicates a frame type, in this case, a registration request. Duration 802 indicates the transmission period of the frame, DestinationAddress 803 indicates the unique ID of the destination device of the frame, SourceAddress 804 indicates the unique ID of the transmission source device of the frame, and BSSID 805 indicates the identification ID of the wireless LAN group. SequenceControl806
Indicates the sequence number of the frame to be transmitted. FrameBod
y807 indicates the data body included in the frame. C
RC808 indicates a cyclic code for error detection.

In the wireless base station 301, the wireless base station 301
The MAC processing unit 304 receives the registration request message 310 and extracts the SourceAddress 804, which is the unique ID of the transmission source device, from the received registration request message 310. The extracted SourceAddress 804 is notified to the IP communication processing unit 305 as a duplicate check request message 311.

In the IP communication processing unit 305, the wireless mobile terminal 300 notified by the duplicate check request message 311 is sent.
SourceAddress 804, which is the unique ID of IPv6 Statel
The IP address of the wireless mobile terminal 300 is generated according to essAddress Autoconfiguration (IETF RFC2462), and the generated IP address is checked for duplication.

The duplicate check result is sent to the MAC processing unit 304 as a duplicate check result message 312. The MAC processing unit 304 sends out the registration permission message 313 including the IP address duplication check result notified by the duplication check result message 312. As an example of the registration permission message 313, the IEEE802.
In the 11 standard management frame, set FrameControl 801 to the frame type indicating registration permission, and
Frames stored in FrameBody 807 are conceivable.

MAC processing unit 303 of wireless mobile terminal 300
Notifies the IP communication processing unit 302 of the wireless mobile terminal 300 of a MAC registration processing completion message 314 including the duplication check result when the registration permission message 313 includes the duplication check result. To do. In the IP communication processing unit 302, when the MAC registration processing completion message 314 notifies the inspection result that there is no IP address duplication, the wireless mobile terminal 30
IPv6 Stateless Address Autoconfigu from unique ID of 0
The IP address is generated according to ration (IETF RFC2462), and the IP session 315 is started without performing the duplicate check.

According to the present embodiment described above, the wireless mobile terminal 300 can promptly start the communication in which the uniqueness of the IP address is secured after the wireless link registration process is completed.

Although the case where IEEE 802.11 is used as the wireless link has been described in the present embodiment, a wireless system using a terminal unique ID when registering the wireless mobile terminal 300 in the wireless base station 301 is described. If so, the same effect can be obtained.

In the present embodiment, IETF R is used as a method for generating an IP address from the unique ID of the wireless mobile terminal.
Although the method described in FC2462 has been used, the same effect can be obtained by using an IP address generation method other than IETF RFC2462 as long as the wireless mobile terminal and the wireless base station have the same IP address generation method. be able to.

[0083]

As described above, as an effect of the present invention, when a terminal is connected to a network, an IP address is automatically generated, and the time required to secure the uniqueness of the generated IP address is shortened. Therefore, there is an effect that the subsequent communication can be started promptly.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a communication network system according to a first embodiment of the present invention.

FIG. 2 is a functional block diagram of the network device according to the first embodiment of the present invention.

FIG. 3 is a flowchart of the operation of the IP address automatic generation network device according to the first embodiment of the present invention.

FIG. 4 is a flowchart of the operation of the IP address duplication check network device according to the first embodiment of the present invention.

FIG. 5 is a configuration diagram of a communication network system according to a second embodiment of the present invention.

[Fig. 6] Fig. 6 is a configuration diagram of a wireless communication network system of a home agent and a mobile terminal for supporting movement of a terminal according to the third embodiment of the present invention

FIG. 7 is a sequence diagram of a registration procedure of a wireless mobile terminal in a wireless base station.

FIG. 8 is a diagram showing an example of an IEEE 802.11 management frame.

FIG. 9 is a diagram showing an example of a data format of an address database.

[Explanation of symbols]

100 link local network 110 IP address duplication check network device 111 Address Research Department 112 address database 113 Communication processing unit 114 Packet type determination unit 115 packet generator 120 network devices 130 Fixed terminal 1 140 Fixed terminal 2 150 mobile terminal 1 160 mobile terminal 2 200 Wide Area Network (WAN) 201 home network 202 Foreign Network 203 Home Agent (HA) 204 Mobile terminal (MN) 300 wireless mobile terminal 301 wireless base station 302 IP communication processing unit of wireless mobile terminal 303 MAC processing unit of wireless mobile terminal 304 MAC processing unit of wireless base station 305 IP communication processing unit of wireless base station 350 wide area network

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kyoya Kimura             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Hirokazu Kobayashi             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Makoto Funabiki             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F-term (reference) 5K030 JL01 JT09 LB09 MD09                 5K033 DA19 DB18 EC02 EC03

Claims (17)

[Claims] 1. A method of generating an IP address of a network terminal using an internet protocol (IP) as a communication procedure, wherein an IP address is automatically generated, and it is received from a control station of a network that the generated IP addresses are not duplicated. An IP address generation method characterized by the above. 2. The IP address duplication check according to claim 1, wherein a packet for automatically checking the duplication of the IP address is transmitted, and the duplication check result is received from a control station of the network. Address generation method. 3. A link local IP address that is valid only within a physically connected local link when connected to a network in a device for generating an IP address of a network device that uses the Internet Protocol (IP) as a communication procedure. And an means for receiving the result of the duplication check of the generated link local IP address from the control station of the network. 4. An IP address generator of a network device that uses Internet Protocol (IP) as a communication procedure, and when a network is connected, a link local IP address valid only within a physically connected local link is provided. An IP comprising: means for automatically generating, means for transmitting a packet for checking the generated link local IP address for duplication, and means for receiving a result of the duplication check from a control station of the network.
Address generator. 5. In a device for generating an IP address of a network device that uses the Internet Protocol (IP) as a communication procedure, a global I that is effective in the entire large-scale network when connected to the network.
An IP address generating device comprising: a unit for automatically generating a P address; and a unit for receiving a result of the duplicated inspection of the generated global IP address from a control station of a network. 6. A global IP that is effective in the entire large-scale network when connected to the network in a device for generating an IP address of a network device that uses the Internet Protocol (IP) as a communication procedure.
A method for automatically generating an address and the generated global I
An IP address generating apparatus comprising: a unit for transmitting a packet for performing a P address duplication check, and a unit for receiving a duplication check result from a control station of a network. 7. A network device comprising any one or a plurality of the IP address generators according to claim 3. Description: 8. In a network that uses Internet Protocol (IP) as a communication procedure, a duplicate check is performed on the IP address of another device connected to the network, and the check result is sent to the corresponding device. The network device according to claim 7. 9. The IP address of all network devices connected to the link local network is recorded in an address database, and the duplication check of the IP address of the newly connected network device is performed by referring to the database. 9. The network device according to claim 8, wherein: 10. The IP of all the devices connected to the link local network when the IP address duplication check packet is received from the devices connected to the network.
The network device according to claim 9, wherein the IP address duplication check is performed by referring to the address database in which the address is recorded, and the check result is sent to the corresponding device. 11. A packet sent from a device connected to a network is received, and a source IP address of the packet is compared with an address database recording the IP addresses of all network devices connected to the link local network. 10. The network device according to claim 9, wherein the IP address duplication check is performed by the above, and when the duplication is detected, the inspection result is sent to the corresponding device. 12. A network device having a function of relaying a packet addressed to a network device in a link local network, and when the destination device of the packet is moving to another network, transferring the packet to the destination network. , When receiving a registration request for associating the global IP address (home IP address) in the link local network and the global IP address (care-of IP address) in the destination from the destination network device, all network devices in the link local network A network device that performs a duplicate check of a home IP address requested for registration by referring to an address database that records the IP address of the network device. 13. An Internet protocol (I) is used as a communication procedure by connecting to a base station wirelessly.
A network device connected to a network using P) has means for requesting connection registration to a wireless base station and means for receiving a notification of a result of an IP address duplication check from the wireless base station. And wireless network equipment. 14. An Internet protocol (I) is used as a communication procedure for a registered wireless network device.
A wireless base station that provides a connection to a network using P), means for receiving a connection registration request for a new wireless network device, and means for performing a duplicate check of the IP address of the wireless network device in response to the connection registration request. And a unit for notifying the inspection result. 15. The duplication check means generates an IP address of the wireless network device from the unique ID of the wireless network device in response to a connection registration request of a new wireless network device, and performs the duplicate check on the IP address. The radio base station apparatus according to claim 14, which is performed. 16. The duplication check means has an address database in which the IP addresses of all network devices in a link local network connected by wire or wireless are recorded, and a connection registration request for a new wireless network device is made. 15. The radio base station apparatus according to claim 14, wherein the IP address duplication check is performed by referring to an address database in which the IP address is recorded. 17. The IP address duplication check is performed from the unique ID of the wireless network device to the IP of the wireless network device in response to a connection registration request of a new wireless network device.
16. The wireless base station device according to claim 15, wherein the wireless base station device is configured to generate an address and check an IP address duplication of the wireless network device by referring to an address database in which the IP address is recorded.