JP4509970B2 - Divided transmission / reception communication system for mobile terminals using location information - Google Patents

Divided transmission / reception communication system for mobile terminals using location information Download PDF

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JP4509970B2
JP4509970B2 JP2006150760A JP2006150760A JP4509970B2 JP 4509970 B2 JP4509970 B2 JP 4509970B2 JP 2006150760 A JP2006150760 A JP 2006150760A JP 2006150760 A JP2006150760 A JP 2006150760A JP 4509970 B2 JP4509970 B2 JP 4509970B2
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data
function
transmission
communication
divided
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唯人 堀池
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日立ソフトウエアエンジニアリング株式会社
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  The present invention relates to data communication using wireless by a portable terminal, and relates to a communication method that makes it difficult for an eavesdropper to intercept data by using position information by a GPS function.

  With the development of wireless technology and computer technology, the use of the Internet using portable mobile terminals such as notebook computers, mobile phones, and PDAs (Personal Digital Assistance) is rapidly spreading. Various functions are added to the mobile terminal, and a mobile mobile terminal equipped with a GPS (Global Positioning System) for specifying the current position is also widely used.

  In recent years, negotiations and exchanges of goods are carried out using such portable terminals over the Internet, and it has become necessary to handle highly confidential data such as company information and personal information. Therefore, network security technology is required to protect such confidential information from third parties.

  In particular, in data communication with a mobile terminal, since communication is performed via wireless communication, there is a high possibility that data will be illegally intercepted by a third party. In general, cryptography is introduced as a countermeasure against data interception. However, the encryption technique is a technique that makes it difficult to grasp the contents of data, and is not a technique that makes it difficult for a third party to intercept data. Also, various cryptographic algorithms have been proposed to realize cryptographic communication, but none of the methods requires the amount of computation required to restore plaintext (pre-encrypted data) without having a composite key. Safety is based only on size. Therefore, it is necessary to introduce a new encryption algorithm every time a malicious third party obtains a computer having sufficient computing ability to obtain plaintext.

  Therefore, instead of relying solely on technology that makes it difficult to understand the contents of data, by introducing a method that makes it difficult to understand the contents of data by making it difficult for third parties to intercept data, It is necessary to realize safer communication.

Known techniques related to the present invention include a technique for making data interception difficult by transmitting and receiving data from a plurality of devices (see, for example, Patent Document 1), and making data interception difficult by transmitting jamming radio waves. (For example, refer to Patent Document 2).
JP 2005-39677 A JP 2004-112733 A

  When performing data communication between apparatuses, it is common to transmit and receive all data at once. This method is naturally effective from the viewpoint of time efficiency, and is extremely effective. However, when data interception is performed by a third party, this method has a disadvantage that the eavesdropper 604 can easily acquire all the data transmitted and received between the mobile terminal 605 and the wireless base station 603 as shown in FIG. . In particular, in data communication with a mobile terminal, since communication is performed via wireless communication, there is a high risk of unauthorized data interception. In the figure, reference numeral 601 denotes a communication partner apparatus, and reference numeral 602 denotes a carrier side communication control apparatus.

  Therefore, depending on the application, a communication method that makes it difficult to intercept the data itself is required instead of a communication method that prioritizes time efficiency. As a method of making it difficult to intercept data, a method of emitting jamming radio waves during transmission has been proposed. However, there is a risk that convenience may be impaired, for example, there is a risk that other users cannot use comfortably due to jamming radio waves.

  In view of the above situation, an object of the present invention is to provide a split transmission / reception communication system for a mobile terminal that uses location information and prevents a third party's data interception action and enables safe wireless data communication. And

In order to solve the above problems, the present invention provides the following configurations.
The invention according to claim 1 is a communication system in which a mobile terminal performs data communication with a communication partner device via the Internet using a wireless communication environment including a plurality of wireless base stations.
The portable terminal has a GPS function for acquiring position information from a GPS satellite;
A division communication control function for dividing transmission data into packet group data;
The mobile terminal user has a function of selecting batch transmission / reception or split transmission / reception and switching to the selected function,
The divided communication control function is a function of receiving position information from the GPS function at regular intervals after dividing the transmission data when switched to divided transmission;
A function of transmitting the packet group data divided every time it is confirmed that the mobile terminal has moved to a different radio base station area according to the location information;
A function of receiving position information from the GPS function at regular intervals when switched to split reception;
A function of requesting transmission of packet group data every time it is confirmed that the mobile terminal has moved to a different radio base station area according to the location information;
It is an object of the present invention to provide a divided transmission / reception communication system for a mobile terminal using position information, which has a function of combining received packet group data and returning the data to data before division.

  According to the first aspect of the present invention, there is provided a split transmission / reception communication system for a portable terminal that enables safe wireless data communication by using position information and preventing a third party's data interception action itself. be able to.

Hereinafter, embodiments of the present invention will be described with reference to the drawings showing examples.
FIG. 1 is a system configuration diagram of a split transmission / reception communication system of a mobile terminal using position information according to an embodiment of the present invention.
The divided transmission / reception communication system according to this embodiment includes a mobile terminal 106 connected to the Internet 111, which is a public network, via a wireless communication environment, and a communication partner apparatus 101 connected to the Internet 111 by appropriate means. In this system, the wireless communication environment to which the mobile terminal 106 is connected is composed of a plurality of wireless base stations 104-a, 104-b, 104-c that are separated from each other, and further, the GPS satellite 102 and the carrier side communication A location information service function using the control device 103 is provided.

  The mobile terminal 106 can communicate with the radio base stations 104-a, 104-b, and 104-c by moving, and can communicate with the communication partner via the Internet 111 by connecting to the radio base station 104. It is possible to perform data communication with the apparatus 101 and acquire the current position using the GPS satellite 102.

  The wireless base stations 104-a, 104-b, and 104-c correspond to mobile telephone carrier base stations when, for example, a mobile phone is used as the wireless transmission / reception means of the mobile terminal 106. The portable terminal 106 and the communication partner apparatus 101 can perform data communication with each other via the Internet 111. For example, E-mail is exchanged using the TCP / IP protocol, or HTTP (HyperText Transfer Protocol) communication is used. It is possible to exchange data with each other.

In this divisional transmission / reception communication system, in addition to the conventional batch transmission / reception type communication shown in FIG. 6, divisional transmission / reception that divides data into packet group data that is data in packet groups and transmits the data to different radio base stations 104. Type communication has been added. In the divisional transmission / reception type communication, for example, all data is not transmitted to the radio base station 104-a at a time, and the data is divided into a plurality of packet group data before transmission, and the source (shown as a portable terminal 106-a) In the process of moving from a mobile station to a destination (shown as a mobile terminal 106-b), divisional transmission / reception is sequentially performed to different radio base stations 104-a, 104-b, 104-c.
Although the number of data divisions depends on the method determined by the user and the number of divisions specified in advance, it is efficient to divide the data into two or three because the purpose is to make all data interception difficult. Also suitable. In order to enable transmission / reception to / from different radio base stations 104-a, 104-b, and 104-c, this communication system uses position information using the GPS satellite 102.

  Conventional batch transmission / reception communication is very time-efficient, but all data is transmitted / received at a time. Therefore, if data interception by the eavesdropper 105 is successful, the entire data is easily intercepted. On the other hand, since the divided transmission / reception type communication does not transmit / receive all data at a time, but transmits / receives data by changing the time and place, the data acquired even if data interception is successful at the location where the eavesdropper 105 is present Is only a part. Therefore, it is difficult to grasp the contents of the entire data.

  However, in the divisional transmission / reception type communication, since control for dividing and combining data is necessary when transmitting / receiving data, overhead occurs in processing, and data is not transmitted / received at one time. Has the disadvantage of requiring. The choice of which communication to use is to allow the user to manually select each time an application that sends and receives specific confidential information is used, or to automatically switch when using a predetermined communication. Various implementations are possible. As a specific application example suitable for the split transmission / reception type, there is a salary statement notice distributed using the E-mail function at the destination during a business trip.

  FIG. 2 is a functional block diagram and a processing relationship diagram illustrating an example of the mobile terminal 106 that performs the divided transmission / reception using the GPS satellite 102. The portable terminal 106 includes a wireless communication unit 201, a TCP / IP communication control unit 202, a divided communication control unit 203, a data communication application 204, a user input unit 208, and a screen display unit 209 as functional blocks.

  Note that the data communication application 204 includes a browser function 205 and an E-mail function 206 for exchanging data using the Internet 111, and a GPS function 207 for acquiring position information from the GPS satellite 102. The divided communication control unit 203 is a function added according to the present invention, and is arranged between the data communication application 204 and the TCP / IP communication control unit 202 in this example.

The divided communication control unit 203 performs the following control.
(1) Control at the time of data transmission The transmission data transferred from the data communication application 204 is received, the number of divisions is determined and divided into packet group data. The position information is acquired by using the GPS function 207 at regular intervals after the data is divided, and the divided packet group data is transmitted through the TCP / IP communication control unit 202 every time a predetermined movement is confirmed.

(2) Control at the time of data reception The data received by division from the TCP / IP communication control unit 202 is received, combined, returned to the data before division, and transferred to the data communication application 204. Also in the data reception process, as in the case of data transmission, the GPS function 207 is used to acquire position information at regular intervals, and only when the predetermined movement is confirmed, the divided data can be received. Performs processing to notify the destination. Specifically, when the reception processing of the divided communication is started, the current position is acquired at regular intervals using the GPS function 207 as in the transmission processing, and when the predetermined movement is confirmed, the carrier side communication control device 103 or the communication partner apparatus 101 is notified that the divided reception is possible (transmission request). This is repeated until reception of all data is completed. When all the data is acquired, the divided data are combined again and transferred to the data communication application 204.

  Further, a function for combining the data transmitted by the portable terminal 106 and a function for dividing and transmitting the data to the portable terminal 106 are required, but this function is added to the carrier side communication control device 103. When it is difficult to add the function to the carrier-side communication control apparatus 103, a function of performing transmission / reception in the communication partner apparatus 101 is installed.

FIG. 3 is a flowchart showing an outline of transmission processing in the mobile terminal 106. Here, as an example, a trace when a transmission process using the E-mail function 206 is performed will be described.
First, the user calls the E-mail function 206 from the user input unit 208, creates an E-mail, and transmits it. At this time, the data communication application 204 inquires of the user whether to perform divided transmission or normal batch transmission to the screen display unit 209.
The user selects either divided transmission or normal batch transmission, and inputs a selection result using the user input unit 208. When the data communication application 204 receives a user input result and performs divided transmission, the data is transferred to the divided communication control unit 203. When the normal batch transmission communication is selected, the data is not transferred to the divided communication control unit 203 but is directly transferred to the TCP / IP communication control unit 202 (step 301).

When the divided transmission communication is not performed, the TCP / IP communication control unit 202 creates an IP datagram from the received data, and transmits the data using the wireless communication unit 201 (step 302).
On the other hand, the data transferred to the divided communication control unit 203 for performing divided transmission first determines the number of divisions from the security policy and the data capacity, and divides the data into several packet group data (step 303).

Next, after acquiring the current position information using the GPS function 207, the first data of the divided data is transmitted through the TCP / IP communication control unit 202 and the wireless communication means 201 (step 304).
After a predetermined time has elapsed, the current position is confirmed again using the GPS function 207 (step 305). As a result of confirming the current position, when the predetermined movement can be confirmed from the transmitted position, that is, when it is confirmed that the mobile terminal 106 has moved to a different radio base station 104 area (step 306), the divided data One packet group data is selected from the remaining data and transmitted through the TCP / IP communication control unit 202 (step 307). If a certain amount of movement cannot be confirmed, this operation is performed again after a certain period of time. This operation is repeated until transmission of all the divided data is completed (step 308).
The combination of the data transmitted by the portable terminal 106 is performed by the carrier side communication control apparatus 103 or the communication partner apparatus 101, and the combined data is received by the communication partner apparatus 101.

FIG. 4 is a flowchart showing an outline of reception processing in the mobile terminal 106.
First, the user calls the E-mail function 206 from the user input unit 208 and performs E-mail reception. At this time, the data communication application 204 inquires of the user whether or not to perform the divided reception communication to the screen display unit 209.
In this case, it is assumed that the user of the mobile terminal 106 knows in advance whether the received data is divided.
The user selects either divided reception or normal batch reception, and inputs a selection result using the user input unit 208. When the normal batch reception communication is selected, the received data received by the TCP / IP communication control unit 202 is not transferred to the divided communication control unit 203, but the data is transferred to the data communication application 204 as it is (step 402).

When performing divided reception, the divided communication control unit 203 acquires the current position information using the GPS function 207, and then receives the divided first data from the TCP / IP communication control unit 202 (step). 403).
After a predetermined time has elapsed, the current position is confirmed again using the GPS function 207 (step 404). As a result of confirming the current position, if a predetermined movement can be confirmed from the previously received position, that is, if it can be confirmed that the mobile terminal 106 has moved to a different radio base station 104 area (step 405), the division is performed. In order to notify the divided transmission destination, for example, the carrier-side communication control apparatus 103 or the communication partner apparatus 101, that the data can be received, a divided data transmission request is transmitted to the TCP / IP communication control unit 202 (step 406).

When the divided data is transmitted from the carrier side communication control apparatus 103 or the communication partner apparatus 101 in response to the transmission request, the divided communication control unit 203 receives the divided data (step 407) and accumulates it. If the above-mentioned predetermined movement cannot be confirmed, this operation is performed after a predetermined time has elapsed. This operation is repeated until reception of all the divided data is completed (step 408).
When the divided communication control unit 203 receives all the divided data, the divided communication control unit 203 combines all the received and accumulated divided data to return to the data before the division, and transmits the data to the data communication application 204.
In the portable terminal 106, the divided communication control unit 203 may have a function of determining whether or not data is divided and transmitted.

The reception process differs greatly from the transmission process in the following two points.
(1) In the receiving operation, the mobile terminal 106 does not need to divide the data, so the process of dividing the data is not performed.
(2) If movement can be confirmed by acquiring the current position using a GPS satellite, a transmission request is sent to the other party performing the divided transmission, and the received data is sent (step 407).

FIG. 5 shows a protocol stack and data structure of transmission data at the time of divided data communication. In this example, a division control protocol is implemented as an upper protocol of TCP.
The transition of the data structure will be described step by step.
First, the created transmission data 501 is encrypted by the data communication application 204.

  Thereafter, the encrypted data 502 is transferred to the divided communication control unit 203 and divided into packet group data. The divided packet groups are labeled as division control headers, and packet group data 503-a and 503-b for divided transmission units are generated. The division control header holds information necessary for combining the divided data.

  When it is determined that the packet group data 503 of the divided transmission unit is transmitted from the acquisition of the position information, it is passed to the TCP / IP communication control unit 202. The TCP / IP communication control unit 202 further divides it into individual packet units, adds a TCP / IP header, and transmits it as an IP datagram 504. The data structure transition at the time of reception is in the reverse order of transmission.

It is a schematic block diagram of the division | segmentation transmission / reception communication system of the portable terminal using the positional information which shows one embodiment of this invention. It is a functional block diagram of the portable terminal shown in the previous FIG. It is a flowchart figure at the time of the data transmission of the portable terminal shown in the previous FIG. It is a flowchart figure at the time of the data reception of the portable terminal shown in the previous FIG. It is a transmission data structure figure at the time of the division | segmentation transmission / reception communication in the division | segmentation transmission / reception communication system of this invention. It is a schematic explanatory drawing of the data interception in the batch transmission / reception communication in the wireless communication environment of a prior art example.

Explanation of symbols

101 Communication partner device 104 Wireless base station 106 Mobile terminal 111 Internet 207 GPS function 501 Transmission data 503 Packet group data

Claims (1)

  1. In a communication system in which a mobile terminal performs data communication with a communication partner device via the Internet using a wireless communication environment including a plurality of wireless base stations,
    The portable terminal has a GPS function for acquiring position information from a GPS satellite;
    A division communication control function for dividing transmission data into packet group data;
    The mobile terminal user has a function of selecting batch transmission / reception or split transmission / reception and switching to the selected function,
    The divided communication control function is a function of receiving position information from the GPS function at regular intervals after dividing the transmission data when switched to divided transmission;
    A function of transmitting the packet group data divided every time it is confirmed that the mobile terminal has moved to a different radio base station area according to the location information;
    A function of receiving position information from the GPS function at regular intervals when switched to split reception;
    A function of requesting transmission of packet group data every time it is confirmed that the mobile terminal has moved to a different radio base station area according to the location information;
    A divisional transmission / reception communication system for a portable terminal using position information, comprising a function of combining received packet group data and returning the data to the data before division.
JP2006150760A 2006-05-31 2006-05-31 Divided transmission / reception communication system for mobile terminals using location information Expired - Fee Related JP4509970B2 (en)

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US10200889B2 (en) 2015-03-18 2019-02-05 Lg Electronics Inc. Method for receiving signal using distribution storage cache retention auxiliary node in wireless communication system, and apparatus therefor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000115162A (en) * 1998-10-08 2000-04-21 Kodo Ido Tsushin Security Gijutsu Kenkyusho:Kk Secure communication equipment and storage device
JP2004112512A (en) * 2002-09-19 2004-04-08 Fuji Xerox Co Ltd Wireless communication device and method for transferring wireless communication data
JP2005094540A (en) * 2003-09-19 2005-04-07 Hitachi Ltd Data transmission method and apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000115162A (en) * 1998-10-08 2000-04-21 Kodo Ido Tsushin Security Gijutsu Kenkyusho:Kk Secure communication equipment and storage device
JP2004112512A (en) * 2002-09-19 2004-04-08 Fuji Xerox Co Ltd Wireless communication device and method for transferring wireless communication data
JP2005094540A (en) * 2003-09-19 2005-04-07 Hitachi Ltd Data transmission method and apparatus

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