JP2001268261A - Method for providing data communication service using mobile network, mobile unit for receiving data communication service using the mobile network, and external device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for providing a data communication service using a mobile network that can eliminate defects, caused when an external device connected to a mobile unit has an application similar to the function of the mobile unit receiving a data communication service. SOLUTION: Since a device, receiving the data communication service, can be identified by the combination of the identification by the protocol of a layer selectively performed by either of the mobile unit and the external device and the identification by a protocol performed using the mobile unit 100 with a mobile network 300, even if specifications of the external device 200 are set maliciously, the external device 200 cannot illicitly receive the data communication service.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for providing a data communication service using a mobile network, a mobile device receiving the data communication service using a mobile network, and an external device.

[0002]

2. Description of the Related Art In recent years, mobile computing technology for connecting an external device to a mobile device for communication has become widespread.
For example, connecting a personal computer to a mobile device,
A browsing method using an application provided in a personal computer is known. In such communication, browsing is performed by terminating a mobile computer without terminating a protocol of a transport layer or an application layer, but terminating in a personal computer.

[0003]

In recent years, mobile devices having a browser function have become widespread. Such a mobile device has a function of terminating a protocol of a transport layer or an application layer, and can execute the same application as an external device. In the case of transferring content as a data communication service to such a mobile device, the capability of the mobile device such as a display size and a processing speed is limited. For example, a text-only content is prepared according to the ability of the user.

On the other hand, in many cases, the capability of an external device connected to a mobile device is higher than that of the mobile device. When executed, the side that provides the data communication service transfers the content corresponding to the capability of the mobile device to the external device, so that there is a problem that the content becomes unsatisfactory for the user of the external device. In addition, since mobile networks are highly confidential networks, external devices are not always connected to mobile devices in a highly confidential state, so the data communication service provider provides content to mobile devices. However, there is a case where the content should not be provided to the external device.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and occurs when an external device connected to a mobile device has an application having a similar function of receiving a data communication service. It is an object of the present invention to provide a method of providing a data communication service using a mobile network, a mobile device that is provided with a data communication service using a mobile network, and an external device that can solve the inconvenience.

[0006]

According to one aspect of the present invention, there is provided a method for providing a data communication service using a mobile network, the method comprising receiving the data communication service. An identification information receiving step of receiving, from the device, identification information for identifying whether the device is a mobile device that performs communication in the mobile network or an external device connected to the mobile device, based on the received identification information. When the device is identified as the mobile device, a service providing step of providing a service different from that when the device is identified as the external device is provided. According to a second aspect of the present invention, in the data communication service providing method according to the first aspect, the identification information receiving step receives together with the capability of the device, and the service providing stage determines the capability of the device. It is characterized in that different services are provided according to it. The invention according to claim 3 is the data communication service providing method according to claim 1, wherein the identification information is:
It is characterized by being defined in a communication protocol for providing the data communication service. Claim 4
In the data communication service providing method according to the third aspect of the present invention, the identification information may be a first identification defined in a communication protocol of a layer in which a device receiving the data communication service is terminated. Information and second identification information defined in a communication protocol of a layer used between the mobile station and the mobile network that terminates the mobile station. In the comparison between the first identification information and the second identification information, It is characterized in that the device is identified.

According to a fifth aspect of the present invention, there is provided a mobile device for receiving a data communication service using a mobile network, wherein the connection means connects an external device for receiving the data communication service, and the data communication. Selection means for selecting whether the device to be provided with the service is the mobile device or the external device connected to the connection means, and the selection as identification information for identifying the device to be provided with the data communication service Transmitting means for transmitting information about the device selected by the means. According to a sixth aspect of the present invention, in the mobile device according to the fifth aspect, the identification information is defined in a communication protocol of a layer used between the mobile device and the mobile network that terminates. Features.

According to a seventh aspect of the present invention, there is provided an external device for receiving a data communication service using a mobile network,
Connecting means for connecting to a mobile device performing communication in the mobile network, communication control means for performing communication control with the mobile network via the connected mobile device, and the external device receiving the data communication service Transmitting means for transmitting identification information for identifying the device to the mobile network. The invention according to claim 8 is the invention according to claim 7
Wherein the identification information is defined in a communication protocol that terminates the external device.

[0009]

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

[1. First Embodiment] [1-1. Overall Configuration of First Embodiment] FIG. 1 is a diagram showing the overall configuration of the first embodiment. This embodiment has a configuration in which a mobile device 100 having a browser is connected to an external device 200 using a cable 110 having a 16-core interface. As the external device 200, for example, an information device such as a car navigation device or a personal computer is suitable.

The mobile station 100 has subscribed to a mobile network 300 which is a packet communication network.
00 AL terminal device 4 which is a gateway server to the outside
A TL terminating device 310 having a function of terminating and interconnecting communication protocols between the communication device 00 and the mobile device 100 is provided. The AL terminating device 400 is an information provider (Infoma
tion Provider (IP) is a device that converts a communication protocol used with the IP server 500 into a communication protocol used in the mobile network 300.
Is a server that provides a data communication service to the mobile device 100 or the external device 200.

Each of the mobile device 100 and the external device 200 has a browser as the same application for receiving the data communication service, and the IP server 50 is used regardless of whether the mobile device 100 or the external device 200 is used.
0 is provided so that one of the browsers can be executed to receive the data communication service.

[1-2. Protocol stack] where
The protocol stack according to the present embodiment will be described with reference to FIG. In the figure, "Layer 1" indicates a physical layer protocol, "Layer 2" indicates a data link layer protocol, and "Layer 3" indicates a network layer protocol, and specific names are omitted here. . In the present embodiment, the same application provided in the mobile device 100 and the external device 200 is a browser.

By the way, in order to reduce the overhead due to the communication protocol in the mobile network 300 and to improve the communication efficiency as a network, in the present embodiment, the mobile network 300 uses a simplified protocol without using a general-purpose Internet protocol. Is used. In the figure, “TL” indicates a simplified transport layer protocol, and “AL” indicates a simplified application layer protocol. For this reason, the AL terminating device 400 communicates with the IP server 500 via the Internet protocol (TCP / IP (Transmission Control).
Protocol), HTTP / SMTP (Hyper Text Transf)
er Protocol / Simple Mail Transfer Protocol)) to convert HTTP / SMTP to AL. The TL terminator 310 has a TCP / I connection with the AL terminator 400.
Terminate P and convert the network layer to layer 3 and the transport layer to TL.

Here, the physical layer to network layer protocols will be referred to as "lower layers", and protocols above the transport layer will be referred to as "upper layers". In the present embodiment, this upper layer must be terminated as a protocol used for the data communication service. And
As described above, in the present embodiment, the mobile device 100 and the external device 200 both have the same application (browser), and any of the devices is used to transfer data used in executing the application.
As an upper layer, a transport layer protocol TL and an application layer protocol AL which are simplified Internet protocols are used. Therefore, the termination of the upper layers TL and AL must be performed in either the mobile device 100 or the external device 200.

In the present embodiment, as will be described in detail later, an external device 200 is connected to the mobile device 100.
In addition, when the external device 200 is authenticated as a valid device, the external device 200 terminates the upper layer. The lower layers between the mobile device 100 and the TL terminating device 310 are Layer 1 to Layer 3. If the device terminating the upper layer is the external device 200, these are terminated and The protocol is converted into a protocol used for communication with the device 200. More specifically, layer 1 is terminated and converted into a mobile station interface (I / F) protocol, and layer 2 and layer 3 are terminated and serial protocol and LAPB (Link Access Procedure) are terminated.
e Balanced Mode) protocol.

[1-3. Functional Configuration of Mobile Device and External Device] Next, referring to the block diagram shown in FIG.
The functional configuration of the mobile device 100 and the external device 200 will be described. As shown in FIG. 3, the mobile device 100 includes a mobile network 300.
, A communication function 101, an interface function 102 with the external device 200, a determination function 103 for determining the connection state of the external device 200, an authentication function 104 for determining whether the external device 200 is a legitimate device,
A function 105 for terminating L and AL and a function 106 for executing an application are provided. Note that the interface function 1 of the mobile device 100 in the present embodiment
02 has a function of transmitting and receiving data signals to and from an external device without terminating TL and AL.

On the other hand, the external device 200 has an interface function 201 with the mobile device 100, a function 202 for controlling communication with the mobile device 100, and notifies the mobile device 100 that the external device 200 is a legitimate device. Authentication function 203, function 20 for terminating upper layers TL and AL
4 and a function 205 for executing an application. Here, the connection state refers to a state in which the cable 110 is physically connected to the mobile device 100 and the external device 200. This state can be detected electrically or mechanically, for example, depending on the energized state of the connector.

When the mobile device 100 is selected as a device for executing an application and terminating an upper layer, the communication control function 101 transmits / receives a packet to / from the mobile network 300 to the TLP / ALP termination function 10 in the mobile device 100.
5, when the external device 200 is selected, for the packet transmitted to and received from the mobile network 300, the protocol is converted only in the lower layer, and the mobile network 30
The control that is involved in the communication between the external device 200 and the external device 200 is performed. Regarding which device is selected as the device that executes the application and terminates the upper layer,
The determination is performed based on the determination by the connection state determination function 103 and the authentication function 104, and a more specific operation will be described below.

FIG. 4 is a flowchart for explaining the operation of the mobile device 100 for determining which application of the mobile device 100 or the external device 200 is used. In this process, first, it is determined whether or not the external device 200 is connected to the mobile device 100 (S1).
0). Here, when it is determined that the external device 200 is connected (S10; Yes), it is next determined whether or not the connected external device 200 is a legitimate device (S2).
0), when it is determined that the external device is a legitimate device (S20; Yes), the external device 200 is selected as the device that executes the application and terminates the upper layer (S30).

On the other hand, if it is determined in step S10 that no external device is connected (S10; N
o) or when it is determined that the external device 200 is not a legitimate device in the determination in step S20 (S20;
No), the mobile device 100 is selected as the device that executes the application and terminates the upper layer (S4).
0). The mobile device 100 may execute the routine shown in FIG. 4 at the timing of starting communication, or may periodically execute the routine during communication to check the connection state of the external device 200.

In this way, the mobile device 100 determines which application of the mobile device 100 or the external device 200 is to be executed to receive the data communication service. Is performed as described below with reference to FIG. 5.

[1-4. Identification Information] In the present embodiment, the IP server 50 is transmitted from the mobile device 100 or the external device 200.
In the request transmitted to 0, an identifier for identifying whether the request is made from the mobile device 100 or from the external device 200 is included. In the present embodiment, the request structure including the identifier is defined in the application layer of the protocol for receiving the data communication service shown in FIG.

In the example of the request format in the application layer shown in FIG. 5, information on the device making the request is part of the header (UA: User-Agent in the figure).
Is included in the header section. As shown in FIG. 5, the description contents of the header UA are different between the mobile device 100 and the external device 200. As shown in FIG.
In the case of 0, information for specifying the model of the mobile device 100 (“model (i)” in the figure) is described. In this embodiment,
The information for specifying the model of the mobile device 100 is information for identifying that the device that has made the request is the mobile device 100. Further, as shown in FIG. 5B, in the case of the external device 200, information for identifying the external device (“e” in the figure) and information for identifying the type of the device (“device” in the figure) , And information for specifying an application to be executed (“application” in the figure). The generation of such a header UA is performed using the TLP / ALP termination function 105 shown in FIG. 3 in the case of the mobile device 100, and the LP / ALP termination function 20 in the case of the external device 200.
4 is performed.

Here, FIG. 6 shows (1) a protocol stack when the mobile station 100 is selected.
(2) shows a protocol stack when the external device 200 is selected. The layer indicated by the dotted line in FIG. 6 indicates a protocol that is not used, and “i” included in the request in the application layer identifies the mobile station 100 in the header UA described above. And “e” is the external device 200 in the header UA.
Is to be identified.

As described above, when the mobile device 100 is selected as the device for receiving the data communication service, the data received by the mobile device 100 is not transmitted to the external device 200, Since the upper layer TL and AL are terminated at 100 to execute the application, the TL and AL termination function of the external device 200 is not used, and the application is not executed at the external device 200. Therefore, the request in the application layer is generated in the mobile device 100, and the device making the request includes the mobile device 10 in the header UA.
This includes model information ("i" in the figure) for identifying 0.

On the other hand, as shown in FIG. 6B, when the external device 200 is selected, the data received by the mobile station 100 is transmitted to the external device 200, and the external device 200 transmits the data to the upper layers TL and AL. Therefore, the TL and AL termination functions of the mobile device 100 are not used, and the application is not executed in the mobile device 100.

When the external device 200 is selected as a device for receiving the provision of the data communication service, the data received by the mobile device 100 is transmitted to the external device 200, and the external device 200 transmits the data to the upper layers TL and AL. Since the termination is performed and the application is executed, the mobile station 10
At 0, the terminal functions of the upper layers TL and AL are not used, and no application is executed in the mobile device 100. Therefore, the request in the application layer is generated in the external device 200, and the header U
In A, the device that made the request is the external device 200
Model information ("e" in the figure) for identifying the

As a result, the IP server 500 that has received the request can identify on which device the request was generated. This will be described more specifically with reference to FIG.

[1-5. IP Server] As shown in FIG. 7, IP server 500 has a function 5 for receiving a request.
10, a database 520 storing data relating to the mobile device 100 and the external device 200, a database 530 storing content to be distributed to the mobile device 100 or the external device 200, and a content to be distributed to the mobile device 100 or the external device 200. Transfer function 54
0 is provided. The database 520 further stores, as the mobile device data 521, information such as the screen size and the processing speed and information for specifying the installed application for each model. The external device data 522 stores the screen size and the processing speed. Are stored for each type of device.

The device that has made the request received by the IP server 500 can be identified in the application layer as described above, and if the request is from the mobile device 100, the header UA contains information specifying the device type. Since it is included, it is possible to identify the capability of the mobile device 100 that made the request and the installed application based on this information and the mobile device data 521. Similarly, if the request is from the external device 200, the header U
Since A includes information for specifying the type of the device and information for specifying the application, the capability of the external device 200 that has made the request and the application to be executed are identified based on this information and the external device data 522. Can be.

In the content database 530, contents 530-1 to 530 corresponding to the capability of the device receiving the data communication service and the type of application are stored.
-N is stored, and the IP server 500 selects and transfers the content suitable for the capability and application of the device that made the request.

In the content database 530, as shown in FIG. 8, for example, even if the same information is provided as a data communication service, different contents depending on the model of the mobile device 100, the type of the external device 200, and the type of application to be executed are stored. The content to be transferred is stored and can be specified based on the information specified from the header UA. For example, if the mobile device 100 has a small screen size, the mobile device 10 has a large screen size.
A content including audio data is generated in the external device 200 that executes an application that reproduces audio, or an application that reproduces an image is executed in the external device 200 that executes an application that reproduces audio. The external device 200 generates content including image data.

As described above, in the present embodiment, the IP server 500 that provides the data communication service can identify whether the device receiving the data communication service is the mobile device 100 or the external device 200. Therefore, a data communication service according to the capability of the device and the type of application can be provided.

By the way, as shown in FIG.
Since the wireless section up to 0 is encrypted, the secrecy is high, but the secrecy between the mobile device 100 and the external device 200 is not always high. Therefore, the IP server 50
If the information provided as the data communication service is highly confidential, the content is transferred if the request is from the mobile device 100, but the content is not transferred if the request is from the external device 200. Can be considered. As described above, whether the request is from the mobile device 100 or from the external device 200 can be identified by referring to the format in the application layer. It has become.

Here, referring again to FIG.
00 and the external device 200 have the same application layer protocol AL for receiving the provision of the data communication service, and the AL of the mobile device 100 and the A of the external device 200 are provided.
The difference in the specification of L is that the mobile device 100 includes the model information of the mobile device 100 in the header UA of the request, whereas the external device 200 includes the information for identifying the external device in the header UA. It is.

However, the specification of the application layer AL of the external device 200 is tampered with maliciously,
When the header UA includes the model information of the mobile device 100 in the same manner as the specification of the application layer AL, the IP server 500 compares the request made by the external device 200 with the request made by the mobile device 100. In some cases, the content that is erroneously recognized and transferred only to the mobile device 100 is transferred to the external device 200. Therefore, in a second embodiment described below,
In addition to the identification in the upper layer which is selectively executed in the mobile device 100 or the external device 200, the mobile network 300
It is also possible to identify the lower layer protocol used in.

[2. Second Embodiment] Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, layer 3 (network layer) is used as a lower layer protocol.

The sequence shown in FIG.
0 indicates a case where a request has been made. As described in the first embodiment, when the external device 200 makes a request, information for identifying the device is added to the header portion of the application layer AL (S101). External device 2
If the application layer AL of 00 is based on valid specifications, the identification information added here must be “e” that specifies the external device 200 as shown in FIG. . However, in FIG. 11, the external device 200 maliciously sets the application layer AL and adds identification information “i” indicating that the external device 200 is the mobile device 100.

The request including the identification information is shown in FIG.
As shown in FIG. 1, a request including information for identifying a device is transmitted from the external device 200 to the mobile device 100 as a lower layer frame (S102). At this time, the device receiving the data communication service is the external device 2
00 is selected, the mobile device 100
The protocol of the lower layer between 00 and 00 is converted to a protocol in the mobile network 300.

In this embodiment, at this time, information identifying that the external device 200 is selected as the device to receive the data communication service is added to the frame in the layer 3 frame, and the mobile network 300 side Transmitted to (S
103). As shown in FIG. 11, the layer 3 is a mobile network 30
0 is a network layer protocol on the external device 2
No. 00 cannot add identification information to the layer 3 frame. Also, as described in the first embodiment, it is the mobile device 100 that selects the device to receive the data communication service, and the mobile device 100 is always used to transmit data to the IP server 500 side. Mobile device 100
Can add to layer 3 information identifying which device is selected.

The frame including the information to which the identification information is added in the mobile station 100 is stored in the mobile network 300 (TL).
Terminating device 40) through the terminating device 310).
0 (S104). Layer 3 which is a network layer protocol in the mobile network 300 is TL
It is assumed that the data is converted into the Internet protocol by the terminating device 310 but is transmitted to the AL terminating device 400 with the identification information in the lower layer added.

In the AL terminating device 500, the identification information added in the frame in the lower layer is compared with the identification information added in the application layer of the upper layer (S105). 1
00 or if they do not match as the external device 200 (S105; No), a notification is made that the request results in an error (S106), and the request is not transmitted to the IP server 500. On the other hand, if the identified devices match (S105; Yes), the AL terminating device 400 transmits the request to the IP server 500 (S10).
8).

In the example shown in FIG.
Now, the device identified in the network layer is the external device 20
In contrast to 0, the device identified in the application layer is the mobile device 100, and there is a mismatch between the two. Therefore, the AL terminating device 400 does not transmit the request to the IP server, and can stop the improper request from being made inside the mobile network 300. Therefore, the request received by IP server 500 is:
If the operation is performed by the mobile device 100, the device is identified as the mobile device 100, and if the operation is performed by the external device 200, the device is properly identified as the external device 200. In the sequence shown in FIG. 10, since the request is made in the external device 200, the IP server 500 determines whether or not the content for the external device 200 corresponding to the request is prepared (S108). If it is determined that the content cannot be distributed to the server 200 (S10
8; No), the request is notified of an error (S109), and if it is determined that the content can be distributed to the external device 200 (S108; Yes), the content for the external device is transmitted to the external device 200. Transfer (S1
10).

As described above, in the second embodiment, the mobile device 1
00 and the external device 200, the identification by the protocol of the layer selectively executed by one of the mobile device 100 and the external device 200.
In the above, the identification by the protocol to be executed is combined with the mobile network 300 side so that the device receiving the data communication service can be identified.
Even if the specification is maliciously set, the provision of the data communication service cannot be illegally received.

[3. Modifications] The present invention is not limited to the embodiment described above, and various modifications as exemplified below are possible.

In the above embodiment, a protocol obtained by simplifying the Internet protocol is used in the mobile network 300, but may be an Internet protocol or another protocol. Even in such a case, a device that terminates a protocol related to the execution of the same application provided in the mobile device 100 and the external device 200 may be configured such that either the mobile device 100 or the external device 200 is selected. I just need.

In the above embodiment, an information providing WWW (World Wide Web) is used as an example of a data communication service.
However, the present invention is not limited to this, and may be an information transfer type e-mail, file transfer, or information search type net news. The application receiving the data communication service is not limited to the browser as in the above embodiment, but may be another application such as a mailer. Also, the server that provides the data communication service is not limited to the IP server 500 described in the above embodiment, and may be performed by the AL terminal device 400 or may be a server connected to the Internet. The applications that are provided with the data communication service provided by the mobile device 100 and the external device 200 do not necessarily have to be exactly the same. If the functions that are not allowed to be executed at the same time are common, they are different applications. You may. For example, the browser provided in the mobile device 100 can display only text data, and the browser provided in the external device 200 can reproduce not only text data but also image data and audio data.

In the above embodiment, a device for executing an application uniformly is selected in accordance with the connection state of the external device 200 and the presence or absence of authentication. However, in the state where the external device 200 is connected and authentication is performed. Even if there is, the user may intentionally cancel the authentication state. For example,
The external device 200 may be provided with an instruction switch for releasing the authentication state, or a command for releasing the authentication state may be provided as an application. This authentication release function may be provided in the mobile device 100 or may be provided in the external device 200.

In the above-described embodiment, the condition of a valid device is not specifically specified. For example, it may be that the protocol specification is properly obtained. It may be for confirming that a similar function (protocol termination or application) is provided. Alternatively, it may be a device such as a user ID for confirming that the device is used by a legitimate user. As the authentication method, any authentication method such as authentication using the telephone number of the mobile device may be used.

In the second embodiment, the first identification information is added to the application layer as the protocol of the upper layer, and the second identification information is added to the network layer as the protocol of the lower layer. However, the present invention is not limited to this. If the layer cannot be added by the external device 200, the second identification information may be added by a protocol of another layer. In the second embodiment, when the external device 200 adds the spoofing identification information to the mobile device 100, the AL terminal device 400
Does not transmit data to the IP server 500, but is not limited thereto. For example, the external device 200
The information to the effect of impersonating 00 may be transmitted separately, or may be added to the request and transmitted. The mode of adding the identification information described in the above embodiment is merely an example, and it goes without saying that any mode may be used.

Further, as shown in FIG.
0 and a connection device 600 for connecting the external device 200.
May be interposed. When a hands-free device having a microphone / speaker for inputting / outputting an audio signal is interposed as a connection device, for example, the upper layer T
It has a function of terminating L and AL, and has an external device 2
Between 00 and 00, any communication protocol may be used. Such a hands-free 600 is provided by the external device 2 as described in the first embodiment.
00, the data signal is received from the mobile device 100 via the cable 111 and the external device 20 is received via the cable 112.
It also has the function of transmitting to 0.

Further, even if the external device 200 has a hands-free function without using a connecting device, and the signal line of the data signal and the audio signal is shared, the external device 200 is automatically turned on. The execution of the application in the external device 200 may be terminated by switching the communication content of the signal line.

[0054]

As described above, it is possible to eliminate the inconvenience that occurs when an external device connected to a mobile device has an application having a similar function of receiving a data communication service.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an overall configuration of a first embodiment.

FIG. 2 is a diagram illustrating a protocol stack in the first embodiment.

FIG. 3 is a block diagram illustrating a functional configuration of a mobile device and an external device.

FIG. 4 is a flowchart illustrating an algorithm for selecting an application to be executed.

FIG. 5 is an example of information added to identify a device.

FIG. 6 is a diagram illustrating a protocol stack when one of an application of a mobile device and an external device is selected.

FIG. 7 is a block diagram illustrating a functional configuration of an IP server.

FIG. 8 is a diagram illustrating an example of content transfer corresponding to an apparatus (part 1).

FIG. 9 is a diagram illustrating an example of content transfer corresponding to an apparatus (part 2).

FIG. 10 is a sequence diagram illustrating an operation of the second embodiment.

FIG. 11 is a protocol stack diagram for explaining the operation of the second embodiment.

FIG. 12 is a configuration diagram when a connection device that connects a mobile device and an external device is provided.

[Explanation of symbols]

100 mobile device, 110 cable, 200 external device, 300 mobile network, 310 TL terminal device,
400: AL terminal device, 500: Information provider server.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Ichiro Inaba 2-1-1-1, Nagatacho, Chiyoda-ku, Tokyo NTT Mobile Communications Network Co., Ltd. (72) Inventor Masaaki Yamamoto Machiji Nagata, Chiyoda-ku, Tokyo F-term (reference) 11-11 cho, NTT Mobile Communications Network Co., Ltd. LL11 MM04 MM05 MM07 NN22 NN25 QQ07 TT05 UU19 9A001 BB04 CC05 CC06 DD10 JJ12

Claims (8)

[Claims] 1. A method of providing a data communication service using a mobile network, comprising: from a device receiving the data communication service to a mobile device that performs communication in the mobile network; An identification information receiving step of receiving identification information for identifying whether the device is a connected external device; and, when the device is identified as the mobile device based on the received identification information, the device is identified as the external device. A method for providing a data communication service, comprising a service providing step of providing a different service. 2. The method for providing a data communication service according to claim 1, wherein the step of receiving the identification information receives the device together with the capability of the device, and the step of providing the service includes different services according to the capability of the device. Providing a data communication service. 3. The data communication service providing method according to claim 1, wherein the identification information is specified in a communication protocol for providing the data communication service. Method. 4. The method for providing a data communication service according to claim 3, wherein the identification information is first identification information defined in a communication protocol of a layer in which a device receiving the data communication service is terminated. And second identification information defined in a communication protocol of a layer used between the mobile station and the mobile network that terminates, and the apparatus is used in comparing the first identification information and the second identification information. A method for providing a data communication service, comprising: 5. A mobile device that receives provision of a data communication service using a mobile network, wherein the connection means connects an external device that receives the provision of the data communication service, and a device that receives the provision of the data communication service. Selecting means for selecting the mobile device or the external device connected to the connecting means; and information on the device selected by the selecting means as identification information for identifying a device to be provided with the data communication service. Transmitting means for transmitting the information. 6. The mobile station according to claim 5, wherein the identification information is defined in a communication protocol of a layer used between the mobile station and the mobile network that terminates the mobile station. Machine. 7. An external device for receiving a data communication service using a mobile network, comprising: connecting means for connecting to a mobile device performing communication in the mobile network; and the mobile network via the connected mobile device. Communication control means for controlling communication with the mobile device, and transmission means for transmitting identification information for identifying that the external device is a device to receive the data communication service to the mobile network. apparatus. 8. The external device according to claim 7, wherein the identification information is defined in a communication protocol that terminates the external device.