JP2002237837A - Access point apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an access point apparatus at a base station, etc., which suppresses a useless consumption of network resources and lightens the load of the network. SOLUTION: When an M-th portable terminal 203M calls a first portable telephone 2031, information for requesting its position are sent via a called home agent 235 to a called external agent 236 to inform a calling external agent 233 of a network ID 241. After establishing a control channel Ccn, an N-th access point unit 202N receives a packet over a user channel Uch from the M-th portable telephone 203M, converts it for regarding as an IP packet which a user cannot set, and makes a tunneling transfer to the called external agent 236 over a route shown by the arrow 245 wherein the authentication process in change over of location areas or handoff domains is emitted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an access point apparatus for receiving a packet signal to be transferred to a mobile host from another mobile host or a communication host.

[0002]

2. Description of the Related Art Mobile devices typified by portable telephones are rapidly spreading and becoming more sophisticated. Many of these mobile devices are mobile IP (Internet Protocol)
Mobile communication can be performed using a communication protocol for mobiles called l). Mobile communication
It is realized by cooperation between a mobile host as a mobile device and a home agent and a foreign agent.

FIG. 5 shows the principle of conventional mobile communication. Mobile host (mobile device) 10
1 can move on the network. Here, it is assumed that the mobile host 101 moves from a home network 102 as a network to be directly connected and used to a destination network 103. The mobile host 101 performs registration (registration) to notify its location at the destination. A home agent (Home Agent: H)
A) 104 is present, and a foreign agent (Foreign Agent: FA) 105 is present in the destination network 103.

In this case, the mobile host 10 after the movement
1 is the foreign agent 10 of the destination network 103
Registration is made to the home server 5 to notify its home address. Upon receiving the notification, the foreign agent 105 registers the registered home address information of the mobile host 101 and the address information of the foreign agent in the home agent 104 of the home network 102.

In this state, it is assumed that a packet addressed to the mobile host 101 is transmitted from the communication host (CH) 106. This packet is forwarded to its home network 102 using the home address, as shown in path 111, and is trapped by the home agent 104 node. The node of the home agent 104 encapsulates the trapped packet and transfers the encapsulated packet to the node of the foreign agent 105 as shown by a path 112. The transfer shown in this path 112 is called tunneling. Upon receiving the encapsulated packet, the foreign agent 105 moves to the mobile host 1
01, refer to the home address information from the registered contents, and transfer the packet to the mobile host 1 as shown in the path 113.
Transfer to 01.

[0006] The mobile host 101 that has received the packet from the communication host 106 in this way, determines the communication host 1 from the source IP address in the IP packet header.
The IP address of the node 06 is determined. Therefore, the packet to the communication host 106 is directly transferred from the mobile host 101 to the communication host 106 as shown as a path 114. As described above,
Host 101 and communication host 106 are mobile host 1
It is possible to exchange packets without changing the IP address 01.

As described above, the mobile host 10
1 and the communication host 106 exchange packets, the routing of the packet sent from the communication host 106 to the mobile host 101 does not match the routing of the packet sent from the mobile host 101 to the communication host 106. The former routing reaches the destination network 103 via the home network 102, and the latter destination network 103 and the communication host 1
When combined with the path 114 connecting 06, a triangular path is formed. For this reason, such routes are not
This is called routing.

[0008]

FIG. 6 shows a case where a mobile host exchanges a packet with a communication host located close to its destination. For example, a mobile host 101 having a home network 102 in Okinawa has moved to Tokyo, and a communication host 106 in Tokyo has become a mobile host 101.
This is a case in which packet communication is performed between the server and the server. The packet transmitted by the communication host 106 travels along the route 111 and is trapped by the node of the home agent 104 in the home network 102 in Okinawa, and the encapsulated packet returns to the destination network 103 in Tokyo via the route 112. . As a result, the reverse route is a large detour as compared with the route 114 of the packet sent from the mobile host 101 to the communication host 106. In such a case, the propagation delay at the time of packet transfer and wasteful consumption of network resources are caused. Such a problem occurs.

In a communication system using mobile devices, authentication is performed to prevent unauthorized access by so-called "spoofing" and to ensure security. For the handoff domain as a domain that does not require handoff, once authentication is performed, authentication is not performed again unless this is switched during communication. This is to reduce processing and eliminate the processing time required for authentication. On the other hand, when the location area or the handoff domain is switched during communication, authentication is performed each time. Therefore, in such a case, there is a problem that as the size of the network increases, the time required for the authentication process increases and the load on the network increases.

An object of the present invention is to provide an access point device such as a base station that can not only reduce wasteful consumption of network resources but also reduce the load on the network.

[0011]

According to the first aspect of the present invention, (a) when a request to transfer a packet from a calling mobile host to a called mobile host is received, the called mobile host receives the request. Position request means for requesting notification of information indicating the position on the network, and (b) information indicating the position of the called mobile host on the network has been sent based on the request from the position request means. At the stage,
When a mobile IP as a communication protocol for a mobile is received from a calling mobile host, a packet sent from the calling mobile host to the called mobile host is transmitted to a subnet to which the called mobile host belongs. And the tunneling transfer means for directly performing the tunneling transfer to the access point device.

That is, according to the first aspect of the present invention, an access point device such as a base station that has received a packet transfer request from a calling mobile host to a called mobile host is connected to the access point device of the called mobile host. Requesting notification of information representing the location on the network by the location requesting means,
At the stage where information indicating the location of the called mobile host on the network has been sent, when the mobile IP as a communication protocol for the mobile is received from the calling mobile host, Packets sent from the mobile host to the called mobile host are directly tunneled to the subnet to which the called mobile host belongs. As a result, the calling side and the called side can transfer packets without passing through the home agent. By optimizing the route, wasteful consumption of network resources and reduction of the load on the network can be achieved. Can be planned.

According to the second aspect of the present invention, (a) when a request to transfer a packet from the calling mobile host to the called mobile host is received, the position of the called mobile host on the network is indicated. (B) when information indicating the location of the called mobile host on the network is sent based on the request from the location requesting means, Packet conversion means for converting a mobile IP as a communication protocol for a mobile object sent from a calling mobile host into an IP packet which cannot be set by a user;
(C) The packet converted by the packet conversion means is directly sent to the subnet to which the called mobile host belongs.
The access point device includes a tunneling transfer unit for performing a tunneling transfer.

That is, according to the second aspect of the present invention, an access point device such as a base station that has received a packet transfer request from a calling mobile host to a called mobile host is connected to the access point device of the called mobile host. Requesting notification of information representing the location on the network by the location requesting means,
When information indicating the location of the called mobile host on the network is sent based on the request from the location requesting means, the packet conversion means sends the information transmitted from the calling mobile host thereafter. Mobile IP as a communication protocol for the body is converted into an IP packet that cannot be set by a user. The tunneling transfer means directly transfers the packet converted by the packet conversion means to the subnet to which the called mobile host belongs. As a result, the calling side and the called side can transfer packets without passing through the home agent. By optimizing the route, wasteful consumption of network resources and reduction of the load on the network can be achieved. Can be planned.

According to the third aspect of the present invention, (a) when a request to transfer a packet from the communication host on the calling side to the mobile host on the called side is received, the position of the mobile host on the called side on the network is indicated. (B) when information indicating the location of the called mobile host on the network is sent based on the request from the location requesting means, Packet conversion means for converting a mobile IP as a communication protocol for a mobile object sent from a call side communication host into an IP packet which cannot be set by a user; and (c) conversion by the packet conversion means The access point device includes tunneling transfer means for performing tunneling transfer of the transmitted packet directly to the subnet to which the called mobile host belongs. .

That is, according to the third aspect of the present invention, an access point device such as a base station, which has received a request to transfer a packet from a communication host on the calling side to a mobile host on the called side, operates on the mobile host on the called side. The location requesting means requests notification of information representing the location on the network, and the packet conversion means receives information representing the location of the called mobile host on the network based on the request from the location requesting means. Then, after this, it is impossible for the user to set Mobile IP as a communication protocol for the mobile unit sent from the communication host on the calling side.
It is converted to P packets. The tunneling transfer means directly transfers the packet converted by the packet conversion means to the subnet to which the called mobile host belongs.
Transfer tunneling. As a result, the packet can be transferred without passing through the called-side home agent, and by optimizing the route, unnecessary consumption of network resources can be eliminated and the load on the network can be reduced. .

According to a fourth aspect of the present invention, the access point device according to the first or second aspect performs position management such as handoff, position registration, and authentication of the mobile host when wirelessly communicating with the mobile host. A wireless resource management unit that controls transmission of the data using a control channel.

That is, in the invention according to claim 4, the radio resource management unit communicates requests and the like of the position request means using the control channel.

According to a fifth aspect of the present invention, in the access point device according to the fourth aspect, a mobile host power on / off determining means for receiving a signal indicating power on / off of the mobile host and determining this signal, Location registration management means for registering information indicating the location of the mobile host when the power of the mobile host is turned on and deleting the information when the power is turned off; and a mobile whose location has been registered by the location registration management means. An authentication granting means for authenticating the host, a notifying means for notifying the mobile server of the mobile host at a stage where the authentication is given, and a corresponding mobile host using an ID obtained based on the authentication host from the authentication server. User channel establishment means for performing user channel establishment processing for, and tunneling transfer using the established user channel The data to be tunneled transfer stage further by comprising a data receiving means for receiving from the mobile host.

That is, in the invention according to claim 5, there is used a position registration management means for registering information indicating the position of the mobile host when the power of the mobile host is turned on and deleting the information when the power is turned off. And holds the position information until the power is turned off. The load on the network can be reduced by not performing the authentication processing when the location area and the handoff domain are changed.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments.

FIG. 1 shows an outline of a mobile device location management system using an access point device according to an embodiment of the present invention. This communication system
.. 202 _N connected to the mobile telephone network 201, a plurality of base stations 202 ₁ , 202 ₂ ,... 202 _N , and these base stations (hereinafter referred to as access points) 20.
2 _1, 202 _2, is constituted by a mobile telephone 203 which is movable between ...... 202 _N.

FIG. 2 shows the configuration of the N-th access point device. Since the first to (N−1) th access point devices 202 ₁ ,..., 202 _N−1 have basically the same configuration as the _Nth access point device 202 _N , their illustration and description will be omitted. Omitted. Nth
Access point device 202 _N
Modem 211 for communicating wirelessly with the mobile phone 20
An IWF (Inter Working Function) unit 213 and an access control unit 212 that controls access to the Internet 3 are provided. Here, the modem unit 211 is the mobile phone 2
03 and wireless frame processing. The access control unit 212 is premised on performing transmission / reception processing of a radio frame including an access channel Ach, a control channel Cch, and a user channel Uch. Here access channel Ach
(Not shown) is a channel existing in the access control unit 212 and used for controlling access. IWF unit 213
Is a part for performing a data communication service in a voice band, and has a function of converting a digital signal transmitted from a wireless section into data in a 3.1 KHz band.

The IWF unit 213 includes a tunneling transfer control unit 214 for controlling tunneling transfer and a data structure conversion unit 215 for converting a data structure.
A position management control unit 216 for managing positions, an authentication processing control unit 217 for controlling authentication processing, and a wireless resource management unit 218 for managing wireless resources are arranged. The data structure conversion unit 215 is the mobile phone network 2
01 is communicated with. The data structure conversion unit 215 converts the mobile IP into an IP packet. In the downstream direction, IP packets are mapped to mobile IP. The tunneling transfer control unit 214 controls a transfer destination. Specifically, when performing tunneling transfer when the mobile phone 203 belongs to another subnet, the data structure conversion unit 215 performs a conversion process so that a foreign agent of the subnet is regarded as a home agent, and
Information is notified to a location and an authentication server (both not shown). Authentication control information 219 is transmitted between the authentication processing control unit 217 and the radio resource management unit 218, and a signaling IP message 220 is transmitted between the access control unit 212 and the radio resource management unit 218. .

With such a system configuration, for example, FIG.
The mobile phone 203 _M of the M present in the jurisdiction area of the access point device 202 _N for N-th is present in the first jurisdiction area of the access point apparatus 202 ₁ shown in 1
It is assumed that the call the mobile phone 203 _1. When the user (not shown) of the portable telephone 203 _M of the M turns on the power, the beacon signal is transmitted. This beacon signal requests association of the access channel Ach, and is received by the _Nth access point device 202N. The received association request is sent to the radio resource management unit 218. Radio resource management unit 21
Reference _numeral 8 denotes a part for managing the number of terminals accommodated in the area under the jurisdiction of the Nth access point device 202N (area of a unit smaller than a subnet in units of nodes).
For example, when the portable telephone 203 _M is simply waiting state of the M is so as not to occupy the radio resources so as to ensure the number of terminals to be newly accommodated within the jurisdictional area.

The power supply of the mobile phone 203 _M of the M is when the association request of the access channel Ach turned is performed on the control channel Cch is performed association process to the radio resource is established. The end of the frame of the access channel Ach is the access control unit 2
Step 12 is performed. At this time, the area of the authentication ID is “null”.
l ".

In wireless frame transmission performed between the N-th access point device 202 _N and the M-th mobile phone 203 _M , information such as an IP header required for routing or connection establishment is transmitted to the control channel Cch. Assigning process to radio resource management unit 2
18 go. This is to effectively utilize the network resources used for mobility management.

FIG. 3 shows the principle of switching packets transmitted from the M-th mobile phone to the first mobile phone. The M-th mobile phone 203 _M also has a home agent (Home Agen) similar to the _first mobile phone 203 _1.
t: HA) (hereinafter, called home agent)
It is not necessarily located in the subnet 232 where the 231 exists, and the foreign agent (FA) (hereinafter, referred to as FA)
Calling foreign agent. ) May have moved to the subnet 234 where the 233 exists. In this example, the latter case is taken as an example.

[0030] When the portable telephone 203 _M of the M originates a call using the control channel Cch, the caller foreign agent 233 as the access point device 202 _N for N-th the jurisdiction at that time receives this. Access point apparatus 202 _N is the packet first mobile phone 203 _first home agent of the N transmits (hereinafter, referred to. Callee home agent) to 235. The called home agent 235 sends this to the first mobile phone 203.
Foreign agent (FA) at destination ₁
(Hereinafter referred to as a called foreign agent).

The foreign agent 236 on the called side processes the packet of the user channel Uch following the packet of the control channel Cch which has been tunneled and transferred to the current network thereafter.
The network ID (identifier) 232 is the M-th
Mobile phone 203 _M notifies the calling side the home agent 231 belongs. Here Notification network ID241 is, when the first mobile phone 203 ₁ in the own subnet 237 is present (indicated by a broken line in FIG. 3.) Is the home network address, other subnets 23
The first mobile phone 203 ₁ is Folin network address when present (indicated by a solid line in FIG. 3.) 8. The calling home agent 231 notifies this to the calling foreign agent 233.

On the other hand, the cellular phone 203 _M side of the M second N
Of the access point device 202 _N
h is established, the beacon signal output after the power of the first mobile phone 203 ₁ is turned on, and the access channel Ach
In association request to be transferred, the header information necessary to route IP in the package data required as the position management information assigned to the control channel Cch the first cellular phone 203 ₁ side, from the access channel Ach and control channel Cch, respectively Extract. Then, the data is transferred to the location server and the authentication server using a signaling protocol. Here, the location server is a server that manages location registration information,
Located in the network node. An authentication server also exists at the network node.

On the network side, location registration and authentication of each mobile phone 203 are performed, and a user channel U is provided to the mobile phone 203 to which access from the authentication server is permitted.
A channel establishment process is performed. In addition, the access point device 20
The authentication processing control unit gives the authentication ID managed by the authentication processing control unit 217 in the second IWF unit 213. Here, the user channel Uch refers to a channel to which user information is mapped.

[0034] performed the location registration in the subnet 232 after the first cellular phone 203 ₁ destination turns on the power, when the authentication is given, the called external authentication ID as the access point apparatus 202 ₁ Agent 236
Together with the management associated with that mobile phone 203 _first IP address and MAC (media access control) address IWF unit 213, notification to the authentication server is performed. When the location registration is simply updated, the authentication I
The acquisition process of D does not start. When a notification to the authentication server is performed, for the first mobile phone 203 _1, location area ID, network ID, the authentication ID in the access channel Ach with access point ID
Is notified. This is to know first cellular phone 203 ₁ is present anywhere.

[0035] Unlike the example shown in FIG. 3, the first mobile phone 203 ₁ is assumed to be located in the subnet 237 of the called side home agent 235. In this case, the location server needs to know exists in which location area the first mobile phone 203 _1. When the Figure 3 the first mobile phone 203 ₁ as shown is positioned in the subnet 128 of the called side external agent 236, and ends at the location server in the home network exist in any location area of Folin network No need to know. Since the access point device 202 ₁ knows this, it suffices to know which access point device 202 subordinates the first mobile phone 203 ₁ . To determine the presence of such first mobile phone 203 _1, the authentication ID such as the location area ID is used.

By the way the first mobile phone 203 ₁ mobile phone 203 or the like, when using off-line, usually open all channels to perform disassociation. This is because the number of terminals that can be accommodated in the area as the access point device 202 is ensured by releasing the radio resource in the standby state. However, in the present embodiment, the association is performed by using the authentication ID once acquired after the mobile phone 203 is turned on at the time of online connection. This allows
The control channel Cch and the user channel Uch can be established without performing the authentication process again.

Also, when the mobile phone 203 moves across the location area during communication, the authentication I
By using D, it becomes possible to omit an authentication process that occurs every time a handoff or location registration update is performed. The access control unit 212 in the access point monitors the power ON / OFF signal notified from the corresponding mobile phone 203. Then, in addition to the normal location registration update processing, the location management control unit 216 performs processing for deleting data from the location server when the power of the corresponding mobile phone 203 is turned off. If the authentication is not successful, the establishment processing of the user channel Uch is not performed, and the location registration is not updated.

[0038] If the first mobile phone 203 _1, such as those belonging to the subnet 238, as shown, the home agent 235 manages the first network address of the portable phone 203 _1. On the other hand, the called foreign agent 236 is the first mobile phone 203.
The management of the access point apparatus 202 belongs _1, IP
This is performed in association with the address, the MAC address, and the authentication ID. Such information on the _first mobile phone 203 ₁ is notified to the calling home agent 231 to which the M-th mobile phone 203 _M belongs. The calling home agent 231 will notify this to the Nth access point device 202 _N of the subnet 234.

Now, after the control channel Cch is established,
Nth access point device 202 _NIs the Mth mobile phone
Machine 203_MFrom the user channel Uch
Receive. Nth access point device 202_NIs received
In this case where the dropped packet is a mobile IP (mobil IP)
In this case, the data structure conversion unit 2 shown in FIG.
This is converted into an IP packet at 15. That is, you
Process that the IP packet cannot be set by the user
Work. Then, the N-th access point shown in FIG.
Device 202_NThe tunneling transfer control unit 214 of
This is indicated by the arrow 245 in the first mobile phone 203.₁
Access point device 202 for₁Tons of
Tunneling of the packet to the tunneling transfer control unit 214
Performing the forwarding transfer. This is the calling side e-mail as described in FIG.
What is the transfer of packets via the
Unlike the calling external agent 233, the first mobile phone
Talker 203₁When forwarding a packet, it is a direct transfer to
Can be solved.

Modification of the Invention

FIG. 4 shows a packet transfer system according to a modification of the present invention. In this modification, the communication host 301 is the same as the first mobile phone 203 _{1 in} the embodiment.
The packet is sent to. 4, the same parts as those in FIG. 3 are denoted by the same reference numerals, and description of these parts will be omitted as appropriate. In this example, since the communication host 301 is fixed, the called foreign agent 236
1 communicates the information indicating its position to the called foreign agent 236 from the communication host 301.
The tunneling transfer of the packet indicated by 51 is performed.

In the embodiments and the modified examples described above, the mobile phone 203 is described as an example of the mobile device, but the present invention is similarly applied to other mobile devices such as a PHS (Personal Handyphone System). Of course you can. In the embodiment, the mobile I
The case of connecting to an IP network using P has been described.
By providing the F (Inter Working Function) in the access point, the location management as described in the embodiment can be performed when connecting to another network.

In this embodiment, the called foreign agent 2
36 provides location information to calling home agent 2
31 to the called foreign agent 23
As long as 6 to can know the current position of the portable telephone 203 _M of the M in some way, the calling external agent 2
33 it is possible to make the first location information of the cellular phone 203 ₁ can be notified directly.

[0044]

As described above, according to the first or second aspect of the present invention, a base station or the like that receives a packet transfer request from a calling mobile host to a called mobile host. The access point device obtains information indicating the location of the called mobile host on the network, and transmits a packet sent from the calling mobile host to the called mobile host to the called mobile host. Tunneling transfer is performed directly to the subnet to which it belongs, so that both the calling and called parties can transfer packets without passing through the home agent, and by optimizing the route, waste network resources. The consumption can be eliminated and the load on the network can be reduced.

According to the third aspect of the present invention, an access point device such as a base station that has received a request to transfer a packet from a communication host on the calling side to a mobile host on the called side, The information representing the location of the mobile host on the network is obtained, and the packet sent from the communication host on the calling side to the mobile host on the called side is tunneled and transferred directly to the subnet to which the mobile host on the called side belongs. Therefore, packets can be transferred without going through the home agent on the called side, and by optimizing the route, unnecessary consumption of network resources can be eliminated and the load on the network can be reduced. it can.

According to the fifth aspect of the present invention, there is provided a location registration management means for registering information indicating the position of the mobile host when the power of the mobile host is turned on and deleting the information when the power is turned off. By using this, the position information is held until the power is turned off, so that the load on the network due to not performing the authentication process when the location area and the handoff domain are changed can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a mobile device location management system using an access point device according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of an N-th access point device.

FIG. 3 is an explanatory diagram showing a principle of switching a packet transmitted from an M-th mobile phone to a first mobile phone.

FIG. 4 is a schematic configuration diagram of a packet transfer system according to a modification of the present invention.

FIG. 5 is an explanatory diagram showing the principle of conventional mobile communication.

FIG. 6 is an explanatory diagram showing a case where a mobile host exchanges a packet with a communication host located in a location physically close to a destination in a conventional packet transfer system.

[Explanation of symbols]

 Reference Signs List 201 mobile phone network 202 access point (base station) 203 mobile phone (mobile) 214 tunneling transfer control unit 215 data structure conversion unit 216 location management control unit 217 authentication processing control unit 218 wireless resource management unit 231 calling home agent 232 234, 237, 238 Subnet 233 Calling foreign agent 235 Called home agent 236 Called foreign agent 241 Network ID 301 Communication host

Claims (5)

[Claims] 1. A location request for requesting notification of information indicating a location of a called mobile host on a network when a request for transferring a packet from a calling mobile host to a called mobile host is received. Means for transmitting a mobile IP as a communication protocol for a mobile unit at a stage where information indicating the location of the called mobile host on the network is transmitted based on the request from the location requesting means. And a tunneling transfer means for directly transferring a packet sent from the calling mobile host to the called mobile host to the subnet to which the called mobile host belongs when receiving the packet from the calling mobile host. An access point device characterized by the above-mentioned. 2. A location request for requesting notification of information indicating a location of a called mobile host on a network when a request for transferring a packet from a calling mobile host to a called mobile host is received. Means, and information indicating the location of the called mobile host on the network based on the request from the location request means, and thereafter, the mobile unit sent from the calling mobile host. Packet conversion means for converting a mobile IP as a communication protocol for the user into an IP packet which cannot be set by the user; and directly converting the packet converted by the packet conversion means to the subnet to which the called mobile host belongs. An access point device comprising: a tunneling transfer unit that performs a tunneling transfer. 3. A position request for requesting notification of information indicating a position of a called mobile host on a network when a request for transferring a packet from a calling communication host to a called mobile host is received. Means, and information indicating the location of the called mobile host on the network based on the request from the location requesting means, and thereafter the mobile unit sent from the calling communication host. I as a communication protocol for
Packet conversion means for converting P into an IP packet which cannot be set by the user; and tunneling transfer means for performing tunneling transfer of the packet converted by the packet conversion means directly to the subnet to which the called mobile host belongs. An access point device comprising: 4. A wireless resource management unit for controlling to transmit data for performing location management such as handoff, location registration, and authentication of the mobile host when wirelessly communicating with the mobile host using a control channel. The access point device according to claim 1 or 2, wherein the access point device is provided. 5. A mobile host power on / off determining means for receiving and indicating a signal indicating power on / off of the mobile host, and determining a position of the mobile host when the power of the mobile host is turned on. Location registration management means for registering the represented information and deleting the information when the information is turned off; authentication grant means for authenticating the mobile host whose location has been registered by the location registration management means; Notification means for notifying the authentication server of the mobile host at the given stage; user channel establishment means for performing a user channel establishment process on the corresponding mobile host using an ID obtained based on the mobile host from the authentication server; The data to be tunneled and transferred by the tunneling transfer means using the established user channel is transmitted from the mobile host. 5. The access point device according to claim 4, further comprising: a data receiving unit that receives data from the access point.