JP3284979B2 - Wireless communication device, wireless communication method, and recording medium therefor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication device using the Internet, and more particularly to a process when a mobile terminal device moves to another server.

[0002]

2. Description of the Related Art In recent years, needs for mobile computing have been increasing. In this mobile computing, data is transmitted and received by connecting a computer to the existing Internet using a mobile telephone line or the like. To use the mobile phone line for the line used,
It has a feature that communication is possible from a movable place such as a car.

[0003]

However, in the conventional communication apparatus, since a communication protocol for fixed communication is used, a mobile terminal apparatus moves over subnets and communicates. There is a problem that can not be. In addition, since a telephone line is used, it takes a long time to make a connection, and it cannot be used when there are many telephone users and the line is busy.

[0004] The present invention has been made in view of such circumstances, and provides a communication device capable of performing communication even when a mobile terminal device moves between subnets without using a telephone line. The purpose is to:

[0005]

According to a first aspect of the present invention, there is provided at least one wireless server connected to a network, and a mobile wireless device connected to the wireless server.
A wireless communication device comprising a terminal device and a base station wirelessly communicating with the terminal device , wherein the wireless server has an identification ID of the terminal device and the identification ID.
IP address of the wireless server that is the home server of the terminal device
Receiving a first IP address issuance request transmitted from the terminal device and a table associated with the first
Of the terminal device included in the IP address issuance request
Home of the terminal device that issued the IP address issuance request from D
Determine the IP address of the server by referring to the table
The IP address thus determined is its own IP address.
Wireless with the IP address determined if it is not
A second IP address to the server in place of the terminal device.
A new dress issuance request is sent, and the second IP address
A response containing the IP address issued for the issue request
Receiving the response to the first IP address issuance request.
In response to, characterized in that a relay agent unit to be transmitted to the terminal device.

[0006]

According to a second aspect of the present invention, in the wireless server according to the first aspect, there is provided a wireless communication method for performing a relay agent process for an IP address issuance request, wherein the wireless communication method is transmitted from a terminal device. Receiving a first IP address issuance request including the identification ID of the terminal device, and, based on the identification ID, the IP address of the home wireless server of the terminal device that has issued the IP address issuance request. A process of referring to a table in which the identification ID of the terminal device and the IP address of the wireless server that is the home server of the terminal device having the identification ID are associated with each other, and determining if the determined IP address is other than its own IP address Newly issues a second IP address issuance request to the wireless server having the assigned IP address in place of the terminal device. Receiving the IP address issued in response to the second IP address issuance request, and distributing the received IP address to the terminal device as a response to the first IP address issuance request. And processing.

According to a third aspect of the present invention, there is provided a computer-readable recording medium storing a relay agent program for performing a relay agent process of an IP address issuance request in the wireless server according to the first aspect, The program has a function of receiving a first IP address issuance request including an identification ID of the terminal device transmitted from the terminal device, and a home wireless communication of the terminal device that has issued the IP address issuance request based on the identification ID. Replace the server IP address with the terminal device ID
And a function of referring to a table in which the IP address of the wireless server that is the home server of the terminal device having the identification ID is associated with, and an IP address that is determined when the determined IP address is other than the own IP address A function of newly issuing a second IP address issuance request to the wireless server having
I issued in response to the second IP address issuance request
A computer is provided with a function of receiving a P address and a function of delivering the received IP address to the terminal device as a response to the first IP address issuance request.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an outline of a wireless communication apparatus according to an embodiment of the present invention will be described. The wireless communication device in the embodiment is a wireless communication device used when connecting a terminal device to the Internet using wireless,
The wireless communication device includes at least one wireless server connected to the Internet, and a base wireless device connected to the wireless server and communicating wirelessly with a mobile wireless device connected to the terminal device. Positioning one of the wireless servers as a home wireless server and communicating with the mobile wireless device in a wirelessly communicable area of a wireless base station of the home wireless server, whereby the Internet A terminal device is connected.

The wireless server, when connecting the terminal device, responds to a registration request from the terminal device,
Terminal authentication management means for authenticating connection to the terminal device; and, when connecting the terminal device, issuing an IP address that can be used at that time in response to an IP address issuance request from the terminal device. Terminal management means for registering the connection of the terminal device.

[0011] Further, the wireless server may transmit, from the terminal device, a wireless server other than the home wireless server.
When there is a registration request, a request for connection authentication and issuance of an IP address is made to the home wireless server of the terminal device via the Internet, and the home wireless server issues connection authentication and an IP address. Is issued, the connection between the terminal device and a wireless server other than the home wireless server is permitted.

When the terminal device is connected to a wireless server other than the home wireless server, the wireless server receives packet data addressed to the terminal device to a wireless server to which the terminal device was previously connected. And routing means for transferring the packet data to the wireless server to which the terminal device is connected based on the IP address obtained from the home wireless server.

In the wireless server, the terminal device is connected to a wireless server other than a home wireless server.
When packet data addressed to the terminal device is transferred from the wireless server, the host on the Internet side that transmitted the packet data is notified of the wireless server to which the terminal device is connected at this time. The packet data transmitted after this notification is transmitted directly to the wireless server to which the terminal device is connected, without passing through the previously connected wireless server.

Hereinafter, a wireless communication apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the embodiment. In FIG.
Is a host server. Reference numeral 2 denotes a network to which a host server is connected. Reference numeral 3-n denotes a wireless server connected to the network 2. 2a, 2
b and 2c are sub-networks constructed under the control of the wireless server 3-n. Reference numeral 4-n denotes a wireless server 3-
n, and one wireless server 3
A plurality of base radios 4-n are connected to -n.
Here, only one base station radio 4-n is shown for one radio server 3-n. Reference numeral 5 denotes the wireless server 3
-N is a terminal device connected to the base station 4-n by wireless communication with the base station 4-n, and a computer connected to the mobile station 5a. Terminal (hereinafter referred to as terminal) 5b
Consists of Note that the host server 1 may be a wireless server that communicates with a terminal wirelessly, or may not necessarily have a wireless communication function.

In the terminal device 5, any one of the wireless servers 3-n connected to the network 2 is a home server. Here, it is assumed that the home server of the terminal device 5 shown in FIG. 1 is the wireless server C3-3.

Next, the operation of the communication apparatus according to the embodiment will be described with reference to FIGS. FIG. 2 is an explanatory diagram illustrating an operation of the wireless communication device according to a time change. In FIG. 2, “Dst” represents a transmission destination,
“Src” represents a transmission source. 3, 4, 5, and 6 are flowcharts showing the operation procedure of the wireless communication device.

Here, the home server of the terminal device 5 is:
At present, the terminal device 5 is used as the wireless server C3-3.
Is operating under the management of the wireless server A3-1.

First, the operation when the terminal device 5 moves from the subnetwork 2a of the radio server A3-1 to the subnetwork 2b of the radio server B3-2 will be described.

First, the terminal device 5 requests the wireless server B3-2 for terminal registration authentication and IP address issuance (see FIG. 2A and step S1 in FIG. 3). In response, the wireless server B3-2 performs registration authentication and IP address issuance (see step S2 in FIG. 2A and FIG. 3), whereby the terminal device 5 is controlled by the wireless server B3-2. Can work. Note that the registration authentication operation and the IP
The address issuing operation will be described later.

Next, in the wireless server B3-2, the terminal device 5 moves from the management of the wireless server A3-1 to the management of the wireless server B3-2 with respect to the wireless server C3-3 as the home server. Notification of completion of registration authentication (FIG. 2B, step S3 in FIG. 3).

Next, the wireless server C3 as a home server
-3, in response to the registration completion notification from the wireless server B3-2, notifies the wireless server A3-1 that the terminal device 5 has moved under the management of the wireless server B3-2 (FIG. 3). Step S5). Thereby, the wireless server A3-1
Receives the registration completion notification (step S4 in FIG. 3) and stops managing the terminal device 5 (step S6 in FIG. 3). Also,
The wireless server C3-3 (home wireless server) records that the terminal device 5 is under the management of the wireless server B3-2, and updates the management information (Step S7 in FIG. 3).

Further, the fact that the terminal device 5 has moved is notified to the wireless server A3-1 via the wireless server C3-3 as a home server. This is to determine whether the user has moved.

By such an operation, the terminal device 5 can move under the control of another wireless server.

Next, the operation of the host server 1 transmitting a packet to the terminal device 5 will be described with reference to FIGS. First, the host server 1 transmits an IP packet via the network 2 (Step S11 in FIG. 4). At this time, the host server 1 determines that the terminal device 5 is a wireless server B3.
Since it is not informed that the terminal device 5 is under the management of the terminal device 5, the transmission packet from the host server 1 is transmitted to the wireless server A3-1 to which the terminal device 5 was previously connected (FIG. 2).
(C)).

Subsequently, the wireless device server A3-1 receives the packet (step S12 in FIG. 4), and routes the packet to the wireless server B3-2 so that the packet is transmitted to the wireless server B3-2. (Step S13 in FIG. 4, FIG. 2D), the wireless server B3-2 receives this packet (Step S14 in FIG. 4). Further, the wireless server B3
-2 is routed to the mobile device 5a of the terminal device 5 under management (step S15 in FIG. 4) and transmitted to the mobile device 5a (see FIG. 2E). Further, this packet is transmitted to the terminal 5
b (see FIG. 2 (f)).

Thus, the terminal device 5 can receive the packet transmitted from the host server 1.

Next, the operation of transmitting a packet from the terminal device 5 to the host server 1 will be described with reference to FIGS. First, the terminal 5b transmits a packet to the mobile device 5a (FIG. 2 (g)). Subsequently, the mobile device 5a transmits the packet received via the wireless server B3-2 (FIG. 2 (h)).

Next, the wireless server B3-2 receives the packet (step S21 in FIG. 5), routes the packet to the host server 1, and sends out the IP packet received from the terminal device 5 to the host server 1 (FIG. 5). 2 (i), step S22 in FIG. Next, the host server 1 receives this packet (Step S23 in FIG. 5). At this point, the host server 1 determines from the source address of this packet
Since it is possible to know that the terminal device 5 is under the management of the wireless server B3-2 (step S24 in FIG. 5), the subsequent packet transmission to the terminal device 5 is directly performed by the wireless server B3.
This is performed for 3-2.

Next, from the host server 1 to the wireless server B3
When transmitting a packet to -2, the packet is first transmitted to the wireless server B3-2 (FIG. 2 (j), step S31 in FIG. 6).

Next, the radio server B3-2 receives the packet (step S32 in FIG. 6) and routes it to the terminal device 5 (step S33 in FIG. 6) to transmit the packet to the mobile device 5a (FIG. 2 (step S33)). k)). Further, this packet is transmitted to the terminal device 5 (FIG. 2 (l)).

As described above, the IP packet is transferred when the packet is transmitted / received to / from the terminal device 5, so that every time the terminal device 5 moves, all the hosts are sent to the terminal. Since there is no need to notify that the device 5 has moved, concentration of traffic on the communication line can be prevented.

Next, the operation of issuing an IP address will be described with reference to FIG. First, when the terminal device 5 moves to the communication area of the wireless server B3-2,
A request for issuing an IP address is issued to 3-2.

Next, the wireless server B3-2 determines the home wireless server of the terminal device 5 that has issued the request (here, the wireless server C is the home server), and this wireless server C
A request to issue an IP address is issued to 3-3.

Next, an IP address assignment request is issued to the DHCP server 6-3 (server that issues an IP address) connected to the wireless server C3-3 (home server). Subsequently, the DHCP server 6-3 issues an IP address that can be used at this time in response to the request, and notifies the wireless server C3-3 of the issued IP address.

Next, the wireless server C3-3 passes the issued IP address to the terminal device 5 via the wireless server B3-2. When the wireless server B3-2 is the home server of the terminal device 5, the DHCP server 6-3
2 may issue an IP address.

According to this operation, the IP address issued by the wireless server C3-3 can be used for the terminal device 5 operating under the control of the wireless server B3-2. Is the wireless server C3-3
, And the packet can be transmitted to the terminal device 5 via the wireless server B3-2.

Next, the operation of the wireless server B3-2 when issuing the above-described IP address will be described in detail.

FIG. 10 is a block diagram showing the configuration of the wireless server B3-2. In FIG. 10, reference numeral 3a denotes a network connection unit that transmits and receives packets to and from the network 2. Reference numeral 3b denotes a relay agent unit that transmits an IP address issuance request to the DHCP server 6-3 and receives the issued IP address in response to an IP address issuance request transmitted from the terminal device 5. . Reference numeral 3c denotes a terminal connection unit that establishes communication with the terminal device 5 via the base station radio 4-2. Reference numeral 3d denotes a home server definition unit in which a home wireless server of each terminal device 5 is defined.

Next, referring to FIG. 10 and FIG.
The operation of the wireless server B3-2 when an address is issued will be described. FIG. 11 is a flowchart showing the operation of the wireless server B3-2.

First, the terminal connection unit 3c in the wireless server B3-2 receives the IP address issuance request transmitted by the terminal device 5 via the base station radio 4-2 (step S4).
1). At this time, the terminal device 5 transmits an IP address issuance request by broadcasting (transmitting the same packet simultaneously to devices connected to the network). In response, the wireless server B3
-2 determines whether this packet is an IP address issuance request from the terminal device 5, and if the packet is an IP address issuance request, accepts this request.

Further, the packet of the IP address issuance request includes the identification ID of the terminal device 5 that has transmitted the request. This identification ID is a MAC address of the terminal device 5. This MAC address is an identification number given to the hardware of the terminal device 5.

Next, if the received packet is an IP address issuance request from the terminal device 5, the terminal connection unit 3c
Passes the received packet to the relay agent unit 3b.

Subsequently, the relay agent unit 3b receives the IP address issuance request from the terminal device 5, and extracts the identification ID of the terminal device 5 from the content. Then, the relay agent unit 3d refers to the contents of the home server definition unit 3d to determine the wireless server corresponding to the identification ID (Step S42).

The home server definition section 3d includes an identification ID of each terminal device 5 and a terminal device 5 having this identification ID.
Is provided for associating the IP address of the home wireless server. By referring to this table, the relay agent unit 3b determines the IP address of the home wireless server of the terminal device 5 having the received identification ID.

Next, the relay agent unit 3b transmits an IP address issue request packet to the home wireless server (here, the wireless server C3-3) via the network connection unit 3a in place of the terminal device 5. (Step S43). At this time, the source address of the transmission packet is the IP address of the wireless server B3-2, and the destination address is the IP address of the home wireless server determined earlier.
P address.

Next, the wireless server C3-3, which has received the IP address issue request packet,
-3 is transmitted. Subsequently, in response to this request, the DHCP server 6-3 issues an IP address that can be used at the present time, and
-3. In response, the wireless server C3
-3 is the I-issued by the DHCP server 6-3 to the wireless server B3-2 that has transmitted the packet of the IP address issuance request.
The packet including the P address is transmitted.

Next, the network connection unit 3a receives the packet transmitted by the wireless server C3-3 (step S44). At this time, the network connection unit 3a determines whether the received packet is a return packet of the IP address issuance request, and if the received packet is a return packet, passes the packet to the relay agent unit 3b.

Next, the relay agent unit 3b, which has received the reply packet from the network connection unit 3a, adds the identification ID of the terminal device 5 to this reply packet and passes it to the terminal connection unit 3c.

Next, the terminal connection unit 3c distributes the reply packet to the terminal device 5 by broadcasting (step S45). Subsequently, the terminal device 5 determines whether or not the broadcast packet includes the identification ID of the terminal device 5 and, if so, extracts the IP address included in the packet.

As described above, in response to the IP address issuance request from the terminal device 5, even if the wireless server to be connected at this time is not the home wireless server, the IP address is sent from the home wireless server via this wireless server. Since it is issued, it is possible to connect to another wireless server without changing the setting of the IP address of the terminal device 5.

Further, a packet that is normally broadcast cannot be transmitted to a server or the like connected to another network beyond the network to which the terminal device that transmitted the packet is connected.
However, since a relay agent unit for receiving a broadcast packet and transmitting and receiving an IP address issue request and a reply packet on behalf of the terminal device is provided,
It is possible to transmit an IP address issuance request to a DHCP server connected to another network.

Next, the registration authentication operation will be described with reference to FIGS. First, the terminal device 5 is connected to the wireless server B3.
The registration request (FIG. 9A) and the identification number of the terminal device 5 are transmitted to the terminal device 2 in FIG.

Next, the wireless server B3-2 searches whether or not the authentication data of the terminal device 5 which has issued the request exists in the database 7-2 connected to the wireless server B3-2. As a result, if there is no authentication data in the database 7-2, the terminal device 5
It is determined that the terminal device 3 is not the terminal device 5 which is the home server, and the home server of the terminal device 5 is determined from the received identification number, and an authentication request is sent to the home server (the wireless server C3-3 in this example). Send (Fig. 9
(B)).

At this time, an authentication request is made by adding the random value generated by the wireless server B3-2 and the identification number of the terminal device 5 making the registration request. Further, this random value is also transmitted to the terminal device 5 (FIG. 9C).

Next, the wireless server C3 as a home server
-3 receives the authentication request and calculates the authentication process using the simultaneously received random value and identification number.

Next, the wireless server C3-3 returns this authentication processing result to the wireless server B3-2 (FIG. 9).
(D)).

On the other hand, the terminal device 5 is connected to the wireless server B3-2.
The calculation of the authentication process is performed using the random value received from the server, and the result is returned to the wireless server B3-2 (FIG. 9).
(E)).

Next, the wireless server B3-2 checks the authentication processing results received from the wireless server C3-3 and the terminal device 5 (FIG. 9 (f)). Subsequently, if the result of the verification is identical, the registration request is approved (FIG. 9).
(G)). If the collation results do not match, the registration request is denied as an invalid registration request.

When the authentication data is stored in the database 7-2, since the wireless server is the home server, the authentication operation includes a “registration request” ((a) shown in FIG. 9),
“Authentication request” ((c) shown in FIG. 9), “authentication response” ((e) shown in FIG. 9), “registration acceptance” ((g) shown in FIG. 9)
You only need to do it.

As described above, even when the terminal device 5 is not under the control of the wireless server as the home server, the terminal registration can be authenticated.

Next, referring to FIG. 12, the wireless server B3
-2, the address system of the base station radios 4-2, 4-4 to 6 and the mobile station 5a will be described. In FIG. 12, as an example, the IP address of the wireless server B3-2 is set to "172.3".
1.0.254 ", and the base station radios 4-2, 4-4, 4
Each of the IP addresses of −5 and 4-6 is “172.3
1.3.254 "," 172.31.47.25
4 "," 172.31.63.254 "," 172.3 "
1.79.254 ".

The IP address of one mobile device 5a among a plurality of mobile devices connected to the base station radios 4-2 and 4-4 to 6 is set to "172.33.0.1."

The IP address is usually represented by 32 bits, and is represented by a decimal number by separating every 8 bits with a “.” (Period). In the following description, among the numerical values of the IP address divided into four by “.” (Period), the leftmost numerical value is the first numerical value, the next numerical value is the second numerical value, and so on. Called the fourth numerical value.

The third numerical values "31", "47", "63", and "79" of the base station radios 4-2, 4-4 to 6 have the upper four bits of "0001", "0010", and "79". 001
1 "and" 0100 ", and the lower 4 bits are all set to be" 1111 ". The fourth numerical value of all base stations is “11111110” (10
It is set to be 254) in radix. The lower 4 bits of the third numerical value and the numerical value “1111 1111 1110” represented by the fourth numerical value indicate that this device is a base station radio, and the upper 4 bits of the third numerical value are the base radio signals. This number is used to identify the machine.
The first numerical value and the second numerical value correspond to the radio server B to which these base station radios 4-2 and 4-4 to 6 are connected.
3-2 is shown.

By setting in this way, it is possible to know from the IP address to which wireless server the base station radios 4-2 and 4-4 to 6 are connected, and which base station is the base station. it can.

On the other hand, the mobile device 5a receives the IP address 32
The lower 12 bits of the bit IP address are numerical values assigned by the wireless server B3-2. Therefore, by setting the IP address of the mobile device 5a based on the IP address to which the wireless server B3-2 and the base wireless devices 4-2, 4-4 to 6 are assigned, which base wireless device is connected to You can know.

As described above, the IP address is also assigned to the base station radio, and as shown in FIG.
By using the ISDN routers A and B for the communication between the wireless server B3-2 and the base station 4-4, the communication between the wireless server B3-2 and the base station 4-4 can be reduced. Communication can be performed without change.

As described above, for the terminal device,
One wireless server is positioned as a home server, and the wireless server is provided with a terminal authentication managing unit and a terminal managing unit. The home server performs terminal connection authentication and issues an IP address. Communication can be performed in other areas.

In response to an IP address issuance request from the terminal device, even if the wireless server to be connected at this time is not the home wireless server, the IP address is issued from the home wireless server via this wireless server. Therefore, it is possible to connect to another wireless server without changing the setting of the IP address of the terminal device.

Since the IP packet is transferred when the packet is transmitted / received to / from the terminal device, the terminal device 5 moves to all the hosts every time the terminal device moves. Since there is no need to notify that the communication has been performed, concentration of traffic on the communication line can be prevented.

A program for realizing each step shown in FIG. 11 is recorded on a computer-readable recording medium, and the program recorded on this recording medium is read and executed by a computer system to thereby obtain an IP address. Relay agent processing of the issue request may be performed. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer-readable recording medium” is a floppy disk, a magneto-optical disk, an RO
M, a portable medium such as a CD-ROM, and a storage device such as a hard disk built in a computer system.

Further, a “computer-readable recording medium” is a program that is dynamically transmitted for a short time, such as a communication line for transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a program that holds a program for a certain period of time, such as a volatile memory in a computer system serving as a server or a client in that case, is also included. Further, the above-mentioned program may be for realizing a part of the above-mentioned functions, or may be for realizing the above-mentioned functions in combination with a program already recorded in a computer system.

That is, in a computer-readable recording medium recording a relay agent program for performing a relay agent process of an IP address issuance request, the relay agent program has a function of receiving an IP address issuance request from a terminal device, A function to determine the home wireless server of the terminal device that made the request based on the content of the request, a function to issue an IP address issuance request to the home server on behalf of the terminal device, and an IP address issued by the home wireless server And a function of distributing the received IP address to the terminal device.

By using the above-mentioned wireless communication device, it becomes possible to communicate at the destination where the mobile terminal has moved, and it is possible to perform message communication (e-mail, net news, FTP (file transfer protocol)), voice mail , Web distribution, CTI (Computer Tele
phony Integration: Internet telephony, broadcast, telemetering, ITS (Int
elligent Transport system
m: Intelligent transportation system). If a routing function is used, it can be applied to push-type communication.

[0075]

According to the present invention, a broadcast packet cannot be transmitted to a server or the like connected to another network beyond the network to which the terminal device transmitting the packet is connected. Therefore, a server or the like connected to another network cannot issue an IP address. But,
According to the present invention, the relay agent unit for receiving the broadcast packet and transmitting / receiving the IP address issue request / reply packet in place of the terminal device is provided, so that the DHC connected to another network is provided.
An effect is obtained that an IP address issuance request can be transmitted to the P server.

Further, according to the present invention, an IP address is also assigned to the base station radio, and the IP address is set between the base station and the radio server.
Since the communication is performed by P (Internet protocol), the wireless server B3-2 and the base station radio 4-4 are used.
ISDN routers can be used in communications between the. As a result, even when the distance between the wireless server B3-2 and the base station radio 4-4 is large, communication can be performed without changing these configurations.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a procedure of transmitting a packet in the embodiment.

FIG. 3 is a flowchart illustrating a procedure of transmitting a packet according to the embodiment.

FIG. 4 is a flowchart illustrating a procedure of transmitting a packet in the embodiment.

FIG. 5 is a flowchart showing a procedure of transmitting a packet in the embodiment.

FIG. 6 is a flowchart illustrating a procedure of transmitting a packet according to the embodiment.

FIG. 7 is an explanatory diagram showing an address issuing procedure in the embodiment.

FIG. 8 is an explanatory diagram showing a terminal authentication operation in the embodiment.

FIG. 9 is an explanatory diagram showing a terminal authentication operation in the embodiment.

FIG. 10 is a block diagram showing a configuration of a wireless server B in the embodiment.

FIG. 11 is a flowchart showing an operation of the wireless server B in the embodiment.

FIG. 12 is an explanatory diagram showing an address system in the embodiment.

[Explanation of symbols]

1 ... host server, 2 ... network, 3-n
... Wireless server, 3a ... Network connection unit, 3
b: relay agent unit, 3c: terminal connection unit, 3d: home server definition unit, 4-n: base radio, 5: terminal device, 5a: mobile radio, 5
b ... computer terminal, 6-n ... DHCP server, 7-n ... database.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-212364 (JP, A) JP-A-6-149689 (JP, A) JP-A-9-9332 (JP, A) JP-A 10-108 70540 (JP, A) JP-A-11-355281 (JP, A) JP-A-2000-10072 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04L 12/28 H04L 12 / 56 H04B 7/26 H04Q 7/00

Claims (3)

(57) [Claims] 1. A wireless communication device comprising: at least one wireless server connected to a network; and a base wireless device connected to the wireless server and wirelessly communicating with a terminal device having a mobile wireless device. A wireless server, wherein the wireless server comprises: a table in which an identification ID of the terminal device is associated with an IP address of a wireless server which is a home server of the terminal device having the identification ID; Receiving the IP address issuance request, and determining the IP address of the home server of the terminal device that has issued the IP address issuance request from the identification ID of the terminal device included in the first IP address issuance request with reference to the table. A wireless server having an IP address determined when the determined IP address is other than its own IP address A second IP address issuance request is newly transmitted on behalf of the terminal device, a response including the IP address issued in response to the second IP address issuance request is received, and the response is A wireless server, comprising: a relay agent unit that transmits a response to the first IP address issuance request to the terminal device. 2. The wireless server according to claim 1, wherein
A wireless communication method for performing a relay agent process for a P address issuance request, the wireless communication method comprising: receiving a first IP address issuance request including an identification ID of the terminal device transmitted from the terminal device; Based on the identification ID, the IP address of the home wireless server of the terminal device that has issued the IP address issuance request,
A process of referring to a table in which the identification ID of the terminal device and the IP address of the wireless server which is the home server of the terminal device having the identification ID are associated with each other; Processing for newly issuing a second IP address issuance request on behalf of the terminal device to the wireless server having the IP address determined to
A wireless communication method comprising: receiving a P address; and delivering the received IP address to the terminal device as a response to the first IP address issuance request. 3. The wireless server according to claim 1, wherein
A computer-readable recording medium recording a relay agent program for performing a relay agent process of an address issuance request, wherein the relay agent program issues a first IP address including an identification ID of the terminal device transmitted from the terminal device. A function of receiving a request, based on the identification ID, an IP address of a home wireless server of the terminal device that has issued an IP address issuance request,
A function of referring to a table in which the identification ID of the terminal device and the IP address of the wireless server which is the home server of the terminal device having the identification ID are associated with each other, and when the determined IP address is other than its own IP address A function for newly issuing a second IP address issuance request on behalf of the terminal device to the wireless server having the IP address determined to
A relay agent program for causing a computer to perform a function of receiving a P address and a function of distributing the received IP address to the terminal device in response to the first IP address issuance request. Recording medium.