JPH11266483A - Information delivery method and portable terminal equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently charge a user by transmitting ciphered information to a portable terminal equipment through a first communication means and transmitting key information for deciphering through a second communication means. SOLUTION: A portable terminal 106 which the user carries transmits an information request to a second radio base station 104, and the second base station transmits the information request to an information server 102. The information server 102 transmits information to the portable terminal 106 through a first radio base station 103 in an encryption form. The portable terminal 106 receives ciphered information to transmit a key request for deciphering to the second radio base station 104, and the second radio base station 104 receives this request to transmit it to a management server 101. If judging that the portable terminal 106 is a valid terminal, the management server 101 transmits a requested key to the portable terminal 106 through the second radio base station 104 to enable the portable terminal 106 to decipher the ciphered reception information. The management server 101 may charge the user after transmitting the key to the portable terminal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information distribution method in a communication system for transmitting information such as data, voice, image, etc. to a portable information terminal, and more particularly to an information distribution method in an information providing system using radio or light. It is.

[0002]

2. Description of the Related Art In recent years, information terminals such as personal computers and electronic organizers have been reduced in size, and it has become easier for terminal users to use these information terminals in a mobile environment. Along with this, the demand for a system that provides a large amount of information to these portable information terminals instantaneously is also increasing. Therefore, a mobile communication system capable of high-speed information transmission is being put to practical use.

FIG. 16 is a configuration diagram showing a configuration of a mobile communication system in which a mobile communication system capable of high-speed information transmission is newly added to a conventional mobile communication system. The information providing system according to the conventional example includes a second authentication server 201.
, A first authentication server 207, at least one or more information servers 202, a communication network 205, a first wireless base station 203, a second wireless base station 204, at least one
And more than one portable terminal 206. The information server 202 stores information to be provided to a plurality of mobile terminals 206 via the first wireless base station 203 or the second wireless base station 204. The mobile terminal 206 is the first wireless base station 2
03 and the second wireless base station 204. The second authentication server 201 is connected to the second wireless base station 204
Authentication of the mobile terminal 206 communicating via the.

[0004] Here, the existing mobile communication system includes a second authentication server 201 and a plurality of second wireless base stations 204. Here, in the case where a first wireless base station 204 capable of communication at a higher speed than the second wireless base station is newly added, authentication of the portable terminal 206 communicating via the first wireless base station 203 is performed. First authentication server 207 to be performed
Needs to be added.

As described above, when a mobile communication system capable of high-speed communication is constructed, there is a problem that it is necessary to construct a new authentication server in order to perform appropriate charging.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and provides a large amount of information to a user by using an existing mobile communication system and a high-speed link such as wireless or optical. It is an object of the present invention to efficiently charge a user in a mobile communication system provided instantaneously.

[0007]

In order to achieve the above object, the present invention relates to a first communication means for transmitting and / or receiving a signal of a first communication method, and a first communication method comprising the steps of: In an information distribution method for distributing information to a portable terminal device provided with second communication means for transmitting and / or receiving a signal of a different second communication method, encrypted information encrypted for the portable terminal device Is transmitted via the first communication means, and key information for decrypting the encrypted information is transmitted to the portable terminal via the second communication means.

Further, the present invention provides a first communication means for transmitting and / or receiving a signal of a first communication method, and a transmission and / or reception of a signal of a second communication method different from the first communication method. In an information distribution method for distributing information to a mobile terminal device provided with a second communication means, transmitting encrypted information encrypted to the mobile terminal device via the first communication means, Authenticating the portable terminal device via the second communication means, and transmitting key information for decrypting the encrypted information to the portable terminal device based on the authentication result. .

Further, the present invention is characterized in that the first communication method is a communication method faster than the second communication method. Further, according to the present invention, when the key information for decrypting the encrypted information is transmitted to the portable terminal device via the second communication unit, the portable terminal device is charged. Features.

Further, according to the present invention, the encrypted information received by the information terminal device via the first communication means is not normally decrypted using the key information received via the second communication means. In this case, the portable terminal device transmits the key information retransmission request via the second communication unit.

Further, according to the present invention, the encrypted information received by the information terminal device via the first communication means is normally decrypted using the key information received via the second communication means. In this case, the portable terminal device transmits a decoding completion notification via the second communication unit.

[0012] The portable terminal device of the present invention, when the key management server that manages the key information does not receive a decoding completion notification from the portable terminal device within a predetermined time after transmitting the key information to the portable terminal, The key management server retransmits the key information via the second communication unit.

The present invention further provides a first communication means for transmitting and receiving a signal of a first communication method, and a second communication means for transmitting and receiving a signal of a second communication method different from the first communication method. Comprising, transmitting and / or receiving encrypted encryption information via the first communication means, and transmitting and receiving key information for decrypting the encryption information via the second communication means. Or receiving.

Further, the portable terminal device according to the present invention is characterized in that the first communication method is a communication method which is faster than the second communication method. Further, the portable terminal device of the present invention, when the encrypted information received via the first communication means is not normally decrypted using the key information received via the second communication means, It is characterized by further comprising retransmission request means for making a request for retransmission of the key information via the second communication means.

Further, according to the portable terminal device of the present invention, the encrypted information received via the first communication means is normally decrypted using the key information received via the second communication means. Preferably, the apparatus further comprises a decoding completion notifying means for performing a decoding completion notification via the second communication means.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing a configuration of an information providing system according to an embodiment of the present invention. The information providing system according to the present embodiment includes a key management server 10
1, an information server 102, a communication network 105, a first wireless base station 103, a second wireless base station 104, and at least one or more mobile terminals 106.
The mobile terminal 106 can communicate with the first wireless base station 103 and the second wireless base station 104, and the first wireless base station 1
03 is capable of transmitting information at a higher speed than the second wireless base station 104. On the other hand, the second wireless base station 104 provides a communication service to a geographically wider area than the first wireless base station 103. The information server 102 encrypts and stores information to be provided to the mobile terminal 106, and the key management server 101 stores a key for decrypting the encrypted information. The key management server 101, the information server 102, the first wireless base station 103, and the second wireless base station 104
5 are connected.

Next, an operation example of the information distribution method in the information providing system configured as described above will be described. 2 and 3 are flowcharts showing an information distribution method according to an example of the embodiment of the present invention. When a user requests information,
The mobile terminal 106 owned by the user transmits an information request to the second wireless base station 104, and the second base station transmits the information request to the information server 102. Here, the mobile terminal 1
06 sends an information request to the first radio base station 1 as shown in FIG.
03. The information server 102 transmits the requested information to the portable terminal 106 via the first wireless base station 103 in an encrypted form. The portable terminal 106 that has received the encrypted information transmits a key request to the second wireless base station 104 because the portable terminal 106 needs a key for decrypting the encrypted information. The second wireless base station 104 that has received the key request further transmits the key request to the key management server 101. The key management server 101 transmits the requested key to the portable terminal 106 via the second wireless base station 104. Here, as in the example of the information distribution method shown in the flowchart of FIG. 4 or FIG. 5, the key management server 101 determines whether the portable terminal 106 is a valid terminal via the second wireless base station 104. Or authentication may be performed. When the key management server 101 determines that the mobile terminal 106 is a valid terminal, the key management server 101 transmits the requested key to the mobile terminal 106 via the second wireless base station 104. Upon receiving the key, the portable terminal 106 can decrypt the encrypted reception information. In the key management server 101, it is also possible to charge after transmitting the key to the portable terminal.

As shown in the flow chart of FIG. 6, when the portable terminal 106 receives and decrypts the key, and completes the decryption normally, the portable terminal 106 sends a decryption completion notification to the key management server via the second wireless base station 104. 101, and the key management server 101 may charge after receiving the decryption completion notification.

On the other hand, when the portable terminal 106 is an information providing system in which a contract is made in advance, the key management server determines whether or not the portable terminal 106 has a contract when the key request is received, and makes a contract. It is also possible to transmit the key to the portable terminal 106 only in this case. In the above, the mobile terminal 10
Although the example in which the key 6 receives the key after receiving the information has been described, the mobile terminal 106 may receive the information after receiving the key. Also, the portable terminal 106 requests and receives a plurality of pieces of encrypted information, and when the user later wants to view the information, he requests and receives a key for decrypting only the information he wants to see and wants to see. Only the encrypted information may be decrypted.

As described above, the portable terminal receives the encrypted information from the radio base station capable of high-speed communication,
By receiving a key for decrypting information from a radio base station capable of providing communication services over a wide geographical area, reception of information in a short time and encrypted information over a wide geographical area Can be decrypted, and the information can be transmitted only to authorized users. Further, the key and the billing may be managed only in a communication system that provides a communication service in a geographically wide range. In particular, the second radio base station 1
When using an existing PHS (Personal Handy phone System) base station or car / mobile phone base station as 04, use the existing subscriber information and add a new first wireless base station capable of high-speed communication In this case, billing can be performed using the existing communication system, and a low-cost and high-speed information providing system can be constructed.

Next, an operation example of an information distribution method in which a key request is not issued from a portable terminal will be described. 7 and 8 are flowcharts showing an information distribution method according to another embodiment of the present invention.
The configuration of the information providing system according to the present embodiment is the same as the configuration shown in FIG.

When a user requests information, the portable terminal 106 carried by the user transmits an information request to the second wireless base station 104, and the second base station further transmits the information request to the information server 10.
2 sends an information request. Here, as shown in FIG. 7, the mobile terminal 106 may transmit an information request to the first wireless base station 103. The information server 102 transmits the requested information in an encrypted form to the portable terminal 106 via the first wireless base station 103, but separately transmits a key request to the key management server, and The mobile terminal 106 is requested to transmit a key for decrypting the received information to the mobile terminal 106. This is possible by notifying an identifier for communication via the second wireless base station 104 when the portable terminal 106 issues an information request. Upon receiving the key request, the key management server 101 stores the requested key in the second wireless base station 104.
To the mobile terminal 106 via the.

Here, as in the example of the information distribution method shown in the flowchart of FIG. 9 or FIG. 10, the key management server 101 makes the portable terminal 106 a valid terminal via the second wireless base station 104. It may be authenticated whether or not there is. When the key management server 101 determines that the portable terminal 106 is a valid terminal, the key management server 101 transmits the requested key to the second wireless base station 1.
04 to the portable terminal 106. Mobile terminal 10
When the key 6 receives the key, it can decrypt the encrypted received information. Here, the key management server 101 can also charge after transmitting the key to the portable terminal 106. Also, as shown in the flowchart of FIG.
6 receives and decrypts the key, and when decryption is completed normally, transmits a decryption completion notification to the key management server 101 via the second wireless base station 104, and the key management server 101 transmits the decryption completion notification. It is also possible to charge after receiving. On the other hand, when the mobile terminal 106 is an information providing system in which a contract is made in advance, the key management server determines whether or not the mobile terminal 106 is contracted at the stage when the key request is received, and only when the contract is made, It is also possible to transmit the key to the portable terminal 106.

As described above, the portable terminal receives the encrypted information from the radio base station capable of high-speed communication,
By receiving a key for decrypting information from a wireless base station capable of providing a communication service over a wide geographical area, reception of information in a short time and encryption of encrypted information over a wide geographical area can be performed. Decryption is enabled, and information can be transmitted only to authorized users. Further, the key and the billing may be managed only in a communication system that provides a communication service in a geographically wide range. In particular, the second radio base station 1
When using an existing PHS (Personal Handy phone System) base station or car / mobile phone base station as 04, use the existing subscriber information and add a new first wireless base station capable of high-speed communication In this case, billing can be performed using the existing communication system, and a low-cost and high-speed information providing system can be constructed. Further, there is no need to make a call from a mobile terminal to request a key, and it is possible to construct an information providing system that is more user-friendly.

Next, an operation example of the information distribution method when the portable terminal that has received the encrypted information and the key cannot decrypt the information will be described. FIG. 11 is a flowchart showing an information distribution method according to another embodiment of the present invention. The configuration of the information providing system according to the present embodiment is the same as the configuration shown in FIG.

When transmitting the key to the portable terminal 106 via the second wireless base station 104, the key management server 101 charges the portable terminal 106 or the user of the portable terminal 106. The portable terminal 106 that has received the key decrypts the information using the key. Here, if the information cannot be decrypted normally, the portable terminal 106 transmits a non-decryption notice to the key management server 101 via the second base station 104, and transmits that the information cannot be decrypted normally. Key management server 101
Cancels the accounting if the accounting has been performed after the transmission of the key.

As described above, when information cannot be decrypted with the key received by the portable terminal, the additional charge notification is transmitted via the second radio base station, thereby canceling the charge even if the charge has already been made. It is possible. In addition, since the second radio base station covers a wider geographical area than the first radio base station, when decoding is impossible, there is a high probability that the fact can be notified when decoding is impossible, and illegal charging is prevented. Becomes possible.

Next, another operation example of the information distribution method when the portable terminal that has received the encrypted information and the key cannot decrypt the information will be described. FIG. 12 is a flowchart showing an information distribution method according to another embodiment of the present invention. The configuration of the information providing system according to the present embodiment is the same as the configuration shown in FIG.

The key management server 101 transmits the key to the portable terminal 106 via the second wireless base station 104. here,
The key management server 101 may charge the mobile terminal 106 or a user of the mobile terminal 106. The portable terminal 106 that has received the key decrypts the information using the key. If the information cannot be decrypted normally, the portable terminal 106 transmits a key retransmission request to the key management server 101 via the second wireless base station 104, and requests a key for decrypting the encrypted information. . The key management server 101 transmits the key to the mobile terminal 106 via the second wireless base station 104 based on the request. Here, as in the example of the information distribution method shown in the flowchart of FIG. 13, the key management server 101 authenticates via the second wireless base station 104 whether or not the portable terminal 106 is a legitimate terminal. You may do it. When the key management server 101 determines that the mobile terminal 106 is a valid terminal, the key management server 101 stores the requested key in the second wireless base station 104.
To the portable terminal 106 via the. The portable terminal 106 that has received the retransmitted key decrypts the information using the key. If decryption is not possible again, the portable terminal 106 may transmit a key retransmission request to the key management server again.

Further, the key management server 101 sends the non-decryption notice.
May be sent, and if charging has already been performed, cancellation of charging may be requested. As described above, when information cannot be decrypted with the key received by the mobile terminal, the key can be obtained again by transmitting a key retransmission request via the second wireless base station. In addition, since the second wireless base station covers a wider geographical area than the first wireless base station, there is a high probability that the key can be received again when decryption is not possible, and the information can be correctly transmitted to the mobile terminal. The possibility of decoding can be increased.

Next, another operation example of the information distribution method when the portable terminal that has received the encrypted information and the key cannot decrypt the information will be described. FIG. 14 is a flowchart showing an information distribution method according to another embodiment of the present invention. The configuration of the information providing system according to the present embodiment is the same as the configuration shown in FIG.

The key management server 101 transmits the key to the portable terminal 106 via the second wireless base station 104. The portable terminal 106 that has received the key decrypts the information using the key. Here, as shown in the flowchart of FIG.
If the information can be decrypted normally in the mobile terminal 10
6 may transmit a decryption completion notification to the key management server 101 via the second wireless base station 104, and the key management server 101 may charge when receiving the decryption completion notification within a predetermined time. However, if the mobile terminal 106 cannot correctly decode the information, the mobile terminal 106 does not transmit the decoding completion notification. Therefore, the key management server 101 times out after a lapse of a predetermined time after key transmission, and retransmits the key. Here, as in the example of the information distribution method shown in the flowchart of FIG. 15, before the retransmission of the key, the key management server 101 sends the portable terminal 106 via the second wireless base station 104 to the authorized terminal. Authentication may be performed as to whether or not. If the key management server 101 determines that the mobile terminal 106 is a valid terminal, it retransmits the requested key to the mobile terminal 106 via the second wireless base station 104. The portable terminal 106 can receive the key again and decrypt the information. Here, if the information can be normally decrypted in the portable terminal 106, the portable terminal 106 may transmit a decryption completion notification to the key management server 101 as shown in the flowchart of FIG. On the other hand, when the decryption cannot be performed normally, the portable terminal 106 does not transmit the decryption completion notification, and thus can receive the key again from the key management server.

As described above, when information cannot be decrypted by the key received by the portable terminal, the key can be obtained again. In addition, since the second wireless base station covers a wider geographical area than the first wireless base station, there is a high probability that the key can be received again when decryption is not possible, and the information can be correctly transmitted to the mobile terminal. The possibility of decoding can be increased.

[0034]

As described above, according to the information distribution method of the present invention, it is possible to transmit a large amount of information requested by a user to a portable terminal in a very short time, and to perform more accurate accounting. To do things. Further, it is possible to perform charge management at low cost while utilizing an existing low-speed communication system.

Further, in order to enable authentication to be performed separately from the transmission of information to the portable terminal, the time required for transmitting information to the portable terminal is reduced, and the use efficiency of the channel for transmitting information is improved. It becomes possible.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of an information providing system according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an information distribution method according to an embodiment of the present invention, particularly a flowchart in a case where a portable terminal makes an information request via a second wireless base station.

FIG. 3 is a flow chart showing an information distribution method according to an embodiment of the present invention, particularly a flow chart in a case where a portable terminal makes an information request via a first wireless base station.

FIG. 4 is a flowchart showing an information distribution method according to an embodiment of the present invention, particularly a flowchart in a case where a key management server authenticates a mobile terminal;

FIG. 5 is a flowchart showing an information distribution method according to an embodiment of the present invention, particularly a flowchart in a case where a key management server authenticates a portable terminal;

FIG. 6 is a flowchart illustrating an information distribution method according to an embodiment of the present invention, particularly a flowchart in a case where a portable terminal transmits a decoding completion notification.

FIG. 7 is a flowchart showing an information distribution method according to an embodiment of the present invention, particularly a flowchart in a case where a portable terminal makes an information request via a second wireless base station.

FIG. 8 is a flow chart showing an information distribution method according to an embodiment of the present invention, particularly a flow chart in a case where a portable terminal makes an information request via a first wireless base station.

FIG. 9 is a flowchart illustrating an information distribution method according to an embodiment of the present invention, and is a flowchart particularly when a key management server authenticates a mobile terminal;

FIG. 10 is a flowchart showing an information distribution method according to an embodiment of the present invention, particularly a flowchart in a case where a key management server authenticates a portable terminal.

FIG. 11 is a flowchart illustrating an information distribution method according to an embodiment of the present invention, particularly a flowchart in a case where a portable terminal transmits a non-decoding notification.

FIG. 12 is a flowchart showing an information distribution method according to an embodiment of the present invention, particularly a flowchart in a case where a portable terminal requests retransmission of a key.

FIG. 13 is a flow chart showing an information distribution method according to an embodiment of the present invention, particularly a flow chart in the case where the key management server authenticates the portable terminal when retransmitting the key.

FIG. 14 is a flowchart illustrating an information distribution method according to an embodiment of the present invention, particularly, a flowchart in a case where a key management server retransmits a key due to timeout.

FIG. 15 is a flow chart showing an information distribution method according to an embodiment of the present invention, particularly a flow chart in a case where a key management server authenticates a portable terminal when retransmitting a key.

FIG. 16 is a configuration diagram showing a configuration of an information providing system according to a conventional information distribution method.

[Explanation of symbols]

 101: Key management server 102: Information server 103: First wireless base station 104: Second wireless base station 105: Communication network 106: Portable terminal

Claims (11)

[Claims] A first communication means for transmitting and / or receiving a signal of a first communication method, and a second communication means for transmitting and / or receiving a signal of a second communication method different from the first communication method. An information distribution method for distributing information to a portable terminal device provided with the communication means, comprising: transmitting encrypted information encrypted to the portable terminal device via the first communication means; Transmitting, via the second communication means, key information for decrypting the encrypted information. 2. A first communication means for transmitting and / or receiving a signal of a first communication method, and a second communication means for transmitting and / or receiving a signal of a second communication method different from the first communication method. An information distribution method for distributing information to a portable terminal device provided with the communication means, wherein the encrypted information transmitted to the portable terminal device is transmitted via the first communication means, Authenticating the portable terminal device via the communication means, and transmitting key information for decrypting the encrypted information to the portable terminal device based on the authentication result. . 3. The information distribution method according to claim 1, wherein the first communication method is a communication method that is faster than the second communication method. 4. A method of charging the portable terminal device with the portable terminal device when transmitting key information for decrypting the encrypted information via the second communication means. 4. The information distribution method according to claim 1, wherein 5. When the encrypted information received by the information terminal device via the first communication means is not normally decrypted using the key information received via the second communication means, 5. The information distribution method according to claim 1, wherein the portable terminal device transmits a request for retransmission of the key information via the second communication unit. 6. When the encrypted information received by the information terminal device via the first communication means is normally decrypted using key information received via the second communication means, 6. The information distribution method according to claim 1, wherein the portable terminal device transmits a decryption completion notification via the second communication unit. 7. When the key management server that manages the key information does not receive a decryption completion notification from the mobile terminal device within a predetermined time after transmitting the key information to the mobile terminal, the key management server sets the key information 7. The information distribution method according to claim 6, wherein the information is retransmitted via the second communication means. 8. A communication system comprising: first communication means for transmitting and receiving a signal of a first communication method; and second communication means for transmitting and receiving a signal of a first communication method different from the first communication method. Transmitting and / or receiving the encrypted information via the first communication means, and transmitting and / or receiving via the second communication means key information for decrypting the encrypted information; A portable terminal device characterized by the above-mentioned. 9. The portable terminal device according to claim 8, wherein the first communication method is a communication method faster than the second communication method. 10. When the encrypted information received via the first communication means is not correctly decrypted using the key information received via the second communication means, the key information 10. The communication system according to claim 9, further comprising a retransmission request unit for making a retransmission request via said second communication unit.
0. The mobile terminal device according to item 1. 11. When the encryption information received via the first communication means is normally decrypted using the key information received via the second communication means, the decryption completion notification is sent. 11. The portable terminal device according to claim 9, further comprising a decryption completion notifying unit that performs the decoding via the second communication unit.