JP2002026836A - Mobile terminal, and device for distributing information to mobile terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively and efficiently distribute the newest information without always connecting a portable terminal to a network in a system for distributing area-limited information, which is generated and extinguished dynamically, to a mobile terminal. SOLUTION: Index information is sent through a first channel by using a first communication channel capable of performing a broadcast at a low cost and a fast second communication channel jointly. A terminal side downloads only selected information by using the second channel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for distributing region-limited information to mobile terminals, and more particularly to a mobile terminal device and an information distribution device when the region-limited information is dynamically generated and disappears.

[0002]

2. Description of the Related Art With the development of portable computers and portable telephones and car navigation systems, services for distributing various information to mobile terminals have been realized. Although useful information delivery services are provided regardless of the user's location, such as current affairs news and stock price flash reports, in the case of mobile terminals, there is a high need for information on the location where the user who is moving is currently located. For example, information such as a weather forecast for a place where the user is located, store information such as a restaurant near the place where the user is located, and a timetable of a station nearest to the place where the user is located are required. Such information is valuable information in a specific area, and such information will be referred to as area-limited information in this specification.
However, even if the information is not particularly valuable in a particular area, but the information originator wants to make it accessible only to users in that particular area,
It is also interpreted as area-limited information. For example, if a company wants to advertise its products, particularly in a particular region, the advertisement for that product is region-specific information.

[0003] The services which have already started as services for distributing area-limited information to mobile terminals include "Where" of the NTT DoCoMo Group and "Location Information Service" of DDI Pocket type company. These are services for distributing area-limited information such as a map relating to a position of a mobile terminal to a mobile terminal (a mobile phone having a positioning function in these examples).

The technology described in Japanese Patent Application Laid-Open No. 11-115651, "In-vehicle device control system and in-vehicle device control device" (hereinafter referred to as Reference 1), and pages 1 to 10 of "Interactive system and software" published by Modern Science Co., Ltd. The article on the page "Spatio-Temporal Limited Object System: Sp
aceTag ”(hereinafter referred to as Reference 2a) and“ Multimedia, Distributed, Cooperative and Mobile (DICOMO'99) Symposium ”(July 1999) published by Information Processing Society of Japan (July 1999) on pages 495 to 500 Space-limited object system
The technology disclosed in "SpaceTag, Design and Implementation of Prototype System" (hereinafter, reference 2b) is also intended to distribute area-limited information to mobile terminals.

[0005] Document 1 discloses a technique in which, when a control program of a vehicle-mounted device mounted on a moving vehicle differs depending on the position of the vehicle, the vehicle-mounted device receives a control program suitable for the position from an information center and uses the control program. are doing. The control program is distributed from the information center to the in-vehicle device by broadcast or other means together with information on the effective area and the effective period. The in-vehicle device that has received the control program applies the control program only in its effective area and effective period.

Documents 2a and 2b show a system called SpaceTag. In this system, limited information of a valid period and a valid area is sent to a mobile terminal by means of digital broadcasting or PHS telephone. The mobile terminal selects only valid information according to its own position and time and displays it on the terminal.

[0007] Further, although not intended for distribution of area-limited information, a system for distributing information to mobile terminals with a configuration similar to the present invention is disclosed in Japanese Patent Application Laid-Open No. H8-237387, "Paging mechanism" (hereinafter, referred to as "paging mechanism"). There is a technique described in Reference 3).

Reference 3 discloses a technique relating to a mobile terminal having a built-in pager receiver. It shows a technique for performing a process according to each situation on a mobile terminal when a message is received or an incoming e-mail is notified by paging. For example, when an email arrives, it automatically calls the mail server,
Processing such as downloading the mail text can be performed.

[0009]

Each of the prior arts described above is difficult to use or can be used when a large number of area-limited information frequently occurs or disappears. However, there is a problem that the cost is high. Requests for the occurrence or disappearance of area-specific information are necessary, for example, when you want to distribute information about time-limited bargain products, such as time services, around the store only during that time, or suddenly, such as searching for lost children This can be considered, for example, when it is desired to distribute information that has become a specific area.

"Where Navi" and "location information service"
It is intended for information that hardly changes, such as maps, stores, and timetables, and information that frequently occurs and disappears is not originally targeted for service. For this reason, there is no means for the user to know the occurrence of new information, except for the user to actively use these services repeatedly to check.

In Document 1, since the area-limited information to be distributed is the control program of the vehicle-mounted device, it is considered that frequent occurrence and disappearance are not assumed. However, by frequently broadcasting a new control program with a valid period set, it is possible in principle to distribute area-limited information that frequently occurs and disappears. However, since information is distributed on one channel, when distributing a large amount of information, the receiver side has to receive and discard a lot of unnecessary information, which is inefficient. There is.

Documents 2a and 2b are designed to distribute frequently-occurring area-limited information to mobile terminals, but the distribution method is digital broadcasting or PHS. When digital broadcasting is used, a large amount of information has to be transmitted through one channel as in the case of Reference 1, which is expensive and inefficient. When using PHS, the mobile terminal user needs to know the newly generated area-limited information.
It is necessary to keep the PHS connected at all times or to issue connection requests frequently. This not only imposes a huge communication fee on the user, but also wastes valuable radio wave resources.

Document 3 is not intended to distribute area-limited information in the first place.

[0014]

Means for Solving the Problems The present invention relates to documents 2a, 2
(b) is improved to provide an inexpensive and efficient means for distributing area-limited information. Specifically, a first communication channel for transferring only information relating to the occurrence and disappearance of the area limitation information (hereinafter, referred to as index information) and a second communication channel for transferring individual contents of the area limitation information (hereinafter, referred to as content). Use two communication channels together. The first communication channel uses a low-cost broadcast channel. on the other hand,
A high-speed channel suitable for temporary connection is used as the second communication channel.

Thus, the terminal only needs to monitor only the first communication channel, and only when the index information relating to the area-limited information of interest appears on the first communication channel, the second communication is performed. Information may be accessed using a channel. If the first communication channel has low cost, the mobile terminal can know the index information while keeping the cost low. Since the second communication channel can use a high-speed communication channel even if it costs a little, necessary information can be comfortably obtained by using the high-speed communication. The communication fee for downloading the content can be minimized.

Although the first communication channel may be slow, the index information is individually small, so that a large amount of index information can be handled. In particular, a pager is suitable for the first communication channel. The frequency band (approximately 150 MHz to 300 MHz) used by the pager reaches the inside of the building well, so that index information can be received anywhere. In addition, the simple text transfer function of the pager has recently been replaced by a mail service using a PHS or a mobile phone, etc., and the social problem that the pager has excess frequency band has been solved, and the effective use of radio waves has been solved. Also contribute to.

It is also effective to use a broadcast channel, such as FM teletext, for which the base has already been established, as the first communication channel. In this case, the frequency is assumed to be 50 MHz to 150 MHz. In order to mainly use these frequency bands, the present invention provides a pager receiving function or an FM teletext receiving function in the mobile terminal. When using a pager, focusing on this configuration alone, it is similar to that described in Reference 3, but in Reference 3, information transmitted using the pager is limited to incoming mail information and simple messages. It is not used for sending the index of area-limited information.

Further, the present invention provides an information distribution apparatus for distributing information to the mobile terminal configured as described above. An information distribution device according to the present invention broadcasts index information at low cost using a first communication channel.
When the mobile terminal requests access to the area-limited information via the second communication channel, the content of the area-limited information is transmitted using the second communication channel.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a mobile terminal according to the present invention. The mobile terminal 1
Index receiving means 1 for receiving the first communication channel
0, positioning means 11 for measuring the position of a mobile terminal, information selecting means 12 for selecting information, transmitting / receiving means 13 for transmitting / receiving a second communication channel, and user interface means 14 for realizing a user interface with a terminal user , And a nonvolatile memory 15 for storing information.

The index receiving means 10 receives index information from the outside through the first communication channel. For the first communication channel, a communication method capable of performing broadcast processing at low cost is suitable. For example, a pager used under a name such as a pager (a trademark of the NTT Docomo Group) is an inexpensive broadcast channel. In the present specification, description will be made below assuming that the first communication channel is a pager. However, the same configuration can be applied to FM teletext or another communication channel.

FIG. 2 is a diagram showing an example of the format of index information that the index receiving means 10 receives from outside. One unit of index information includes information of an identification symbol, a name, a latitude, a longitude, an effective radius, a start time, an end time, and a size. One unit of index information is information relating to one area-limited information. The identification symbol is a unique symbol for identifying the regional limitation information. The name is a character string that briefly indicates the contents of the regional limitation information. The latitude and longitude indicate a position (hereinafter simply referred to as a center position) which is a center of an area where the area limitation information is valid. The effective radius indicates a distance at which the area limitation information is effective. That is, it indicates that the area limitation information is effective in a circular area from the center position to a distance separated by the effective radius. Although a circular area is assumed in this example, an area other than the circular area can be defined as an effective area depending on how to give parameters of the index information. For example, a rectangular area is also possible.
Further, by adding information on the height to the index information, the center position can be expressed in three dimensions, and the effective area of the area limitation information can be defined by a sphere or another three-dimensional shape. The start time and the end time indicate the beginning and end of a time zone in which the area-limited information can be accessed. The size indicates the size (such as the number of bytes) of the area limitation information.

[0022] Limiting the information that can be accessed from the mobile terminal by limiting the location and time in this way is also described in documents 2a and 2b, and the method described in these documents is applied. It is possible. For example, a method of classifying area-limited information according to purpose of use (references 2a, 2b
, But is different from the communication channel referred to in the present specification), and a method of changing the manner of displaying the area limitation information according to the distance from the center position can be applied. However, in the documents 2a and 2b, the index information is not treated separately, so that the communication method is different from the present invention.

Returning to the description of FIG. The positioning means 11 is a device that knows the current position and the current time of the mobile terminal 1. Specifically, GPS, which is a positioning system using satellites, is suitable, but other means may be used. For example, a device that knows the position by receiving radio waves from a plurality of base stations installed on the ground may be used.

The information selecting means 12 receives the index information from the index receiving means 10 and receives information on the position and the time from the positioning means 11. The index information is successively sent from the index receiving means 10 to the information selecting means 12. The information selecting means 12 refers to the information on the current position and the current time obtained from the positioning means 11, and selects the current information from the index information. Select the ones that are allowed access at the location and time.

The user interface means 14 is a set of input / output devices for the user of the mobile terminal 1 to perform input / output. For example, a combination of a liquid crystal display as an output device and a keyboard as an input device. A speaker may be provided as an output device, and a microphone or a pointing device such as a touch pad may be provided as an input device. The information selection unit 12 presents the index information selected as described above to the user using the user interface unit 14. FIG. 3 is a diagram illustrating an example of the appearance of a user interface showing a state in which index information is presented to a user when a liquid crystal display is used as an output device. In this example, five items of index information 31a, 31b, 31c, 31 are displayed on the liquid crystal display 30.
d and 31e are shown. In the display of one piece of index information, the start time is presented by a time or date in a 24-hour system, and a name is displayed in addition thereto. For example, in the case of the index information 31a, the start time is 13: 5
Minutes and the name is "Looking for lost dogs." Although not displayed in this example, the displayed items may be changed according to the size of the screen of the liquid crystal display 30 or the like. For example, if the screen is wide, the distance to the center position may be indicated, or the center position of the regional limitation information may be displayed on a map. An example in which the center position of the area limitation information is displayed on a map is also shown in Reference 2b.

The user operates the user interface means 14
Is selected from the index information indicated by. For example, assume that the index information 31a “Search for a lost child dog” is selected. The selected index information is sent to the information selecting means 12. The information selecting unit 12 sends the identification symbol of the index information of the area-limited information that the user wants to browse and the information on the current position obtained from the positioning unit 11 to the transmitting / receiving unit 13 and requests acquisition of the content of the information.

The transmission / reception means 13 is means for performing two-way communication with the information distribution device using the high-speed second communication channel. The second communication channel may be any, but for example, 64 kb in the case of currently widespread technology
There is a PHS that can communicate with ps. One of the current plans is the next-generation mobile phone standard, IMT-2000. Assuming that the mobile terminal is connected to some wired communication medium or the like during use, the second communication channel may be wired communication. Further, different communication means for transmission and reception, for example, different frequency bands may be used.

Now, the transmitting / receiving means 13 includes the information selecting means 1.
Upon receiving the identification code of the area limitation information to be acquired and the information on the current position from the information distribution device 2, the communication connection is established with the information distribution device, and the information on the identification symbol and the current position is transmitted to the information distribution device. The configuration of the information distribution device will be described later. If the information distribution device determines that the area-limited information corresponding to the identification symbol is accessible by comparing the current time and the location of the mobile terminal 1, the information distribution device transmits the content to the transmission / reception means 13 of the mobile terminal 1 through the second communication channel. Send using. The transmitting / receiving means 13 sends the received content to the user interface means 14 via the information selecting means 12 or directly. User interface means 14
Displays the content to the user. FIG. 4 is a diagram showing an example in which the content corresponding to the previously selected index information 31a is displayed on the liquid crystal display 30 of the user interface unit 14.

According to the above-described method, the mobile terminal 1 frequently uses the two communication channels of the first communication channel capable of broadcasting at low cost and the high-speed second communication channel. It becomes possible to selectively receive the region-limited information that disappears or disappears and display it to the user. However, the mobile terminal 1 sometimes turns off the power. When the power is turned on again, there is a problem that the index information cannot be presented to the user unless the user waits for the index information sequentially transmitted using the first communication channel. To solve this problem, the nonvolatile memory 15 is used.

The information selecting means 12 copies the index information received so far to the nonvolatile memory 15 immediately before turning off the power. A nonvolatile memory is a memory that does not lose its stored contents even when the power is turned off, and examples thereof include a flash memory and a hard disk.

When the power is turned on, the information selecting means 12 extracts the index information stored in the nonvolatile memory 15. Of these pieces of index information, information whose end time has passed is deleted because it is not necessary to hold it again. From the remaining index information, only the information relating to the area-limited information that can be accessed according to the current position and the current time of the mobile terminal 1 is displayed on the user interface means 14. As the information on the current position and the current time, the information sent from the positioning means 11 immediately after the power is turned on is used. By doing so, after the power is turned on, the location-limited information accessible at that time and at that time is displayed on the user interface means 14, so that even if the user moves to a place during the power-off period, Information suitable for the location can be obtained.

Next, an apparatus for distributing area-limited information according to the present invention will be described with reference to the drawings.

FIG. 5 is a block diagram showing a configuration of an apparatus for distributing information to mobile terminals according to the present invention. Information distribution device 5
Are index transmitting means 50, transmitting / receiving means 51, database managing means 52, area-limited information database 53,
It comprises an index creation unit 54, a registration unit 55, and a clock 56.

The area limitation information database 53 is a database that collects area limitation information. FIG. 6 is a diagram showing an example of the logical structure of one record stored in the area limitation information database 53. The format is such that the corresponding content is added to the index information described with reference to FIG. The area-limited information database is logically shown in FIG.
Although it is a set of records as shown in (1), it is not necessary to implement with a relational database, and it may be an object-oriented database or another implementation.

FIG. 7 is a diagram showing a specific example of one record of the area limitation information as shown in FIG. In this example, the identification number is 00123456, the area is limited, the name is "Look for lost dog", the center position is 33 degrees 15 minutes 22.123 seconds north latitude, and 138 degrees 20 minutes 3 east longitude.
0.333 seconds, the effective radius is 1 kilometer, the start time is 13:05 on May 20, 2000, the end time is 15: 4 on the same day, and the size is 800
Kilobytes, and the content is the same as the example displayed in FIG. In this case, the content is a mixture of character information and image information, and such information can be expressed by HTML (Hyper Text Markup Language) or other means.

The database management means 52 is a database management system for managing the area limitation information database 53.

The registration unit 55 is a unit for adding new area limitation information. The registration may be performed manually or may be performed by some other automatic means.

The database management means 52 includes the registration means 5
When receiving the new area limitation information from the area 5, the new information is registered in the area limitation information database 53, and the index information part is sent to the index creation means 54.
Upon receiving the new index information, the index creating unit 54 passes the new index information to the index transmitting unit 50.

When no new index information has been generated, the index creation means 54 accesses the area limitation information database 53 via the database management means 52, and sequentially stores the stored index information of the area limitation information. The extracted index information is passed to the index transmitting means 50. Various methods can be considered for the order in which the index information of the regional limitation information is extracted from the regional limitation information database 53. For example,
Simply take out the identification symbols in order. A ranking such as A, B, C, etc. is assigned to the region-limited information in order of importance based on its importance, so that the higher the rank, the higher the frequency of extraction. The area-limited information having a larger effective radius is to be extracted more frequently. The area-limited information whose end time is approaching is extracted more frequently. Items that are within a certain time from the start time, for example, within 10 minutes, are taken out at a particularly high frequency. And so on.

When receiving the index information from the index creating means 54, the index transmitting means 50 broadcasts the index information simultaneously using the first communication channel.

The transmission / reception means 51 uses the second communication channel. When the transmitting / receiving means 51 receives the identification symbol and the information indicating the position of the mobile terminal from any of the mobile terminals via the second communication channel, the transmission / reception means 51 transmits the area limitation information corresponding to the identification symbol to the database management means 52. Via the local limitation information database 53. The current time is obtained from the clock 56. Next, the location information sent from the mobile terminal and the current time are compared with the area limitation information. Send to terminal.

As described above, the second communication channel may be any communication means, and different communication means may be used for transmission and reception.

[0043]

As described above, the mobile terminal according to the present invention receives index information via the first communication channel capable of simultaneous broadcast at low cost, and selects only necessary information from the index information. Since the corresponding content information can be downloaded from the information distribution device via the high-speed second communication channel, it is possible to efficiently receive frequently-occurring and disappearing area-limited information. Further, the information distribution device according to the present invention broadcasts index information related to area-limited information via the first communication channel at the same time,
Since the content is transmitted from the second communication channel in the previous period in response to the request, efficient transmission of the area limitation information to the mobile terminal according to the present invention is possible.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a mobile terminal according to the present invention.

FIG. 2 is a diagram showing an example of the format of index information received by an index receiving unit 10 from outside.

FIG. 3 is a view showing an example of the appearance of a user interface, showing how index information is presented to a user.

FIG. 4 is a diagram showing an example in which content corresponding to previously selected index information 31a is displayed on the liquid crystal display 30 of the user interface unit 14.

FIG. 5 is a block diagram showing a configuration of an information distribution device to a mobile terminal according to the present invention.

FIG. 6 is a diagram showing an example of a logical structure of one record stored in a regional limitation information database 53.

FIG. 7 is a diagram showing a specific example of one record of area limitation information.

[Explanation of symbols]

 1 mobile terminal 10 index receiving means 11 positioning means 12 information selecting means 13 transmitting / receiving means 14 user interface means 15 non-volatile memory 30 liquid crystal display 31a-31e display example of index information 5 information distribution device 50 index transmitting means 51 transmitting / receiving means 52 database management Means 53 Area limited information database 54 Index creation means 55 Registration means 56 Clock

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) H04B 7/26 H04M 3/42 U 5K101 H04M 3/42 3/487 3/487 11/08 11/08 H04B 7/26 M H04Q 7/38 H04Q 7/04 DF term (reference) 2F029 AA02 AA07 AB07 AC02 AC06 AC09 AC13 AC17 AC20 5H180 AA01 AA21 BB05 CC12 EE18 FF05 FF13 FF22 FF32 5K015 AB01 AF02 GA01 GA07 5K024 AA76 CC11 FF11 EE02 FF02 FF03 JJ52 JJ71 5K101 KK18 LL12 MM07 NN18 RR18

Claims (18)

[Claims] 1. A mobile terminal that receives information from the outside by communication, wherein the mobile terminal uses at least an identification symbol for uniquely identifying information using a first communication channel and a constraint on an effective position of the information. Index receiving means for receiving the index information including, positioning means for measuring the current position of the mobile terminal, receiving and storing a plurality of the index information from the index receiving means, required index information from the plurality of index information Information selecting means for selecting only the information, and at least transmitting / receiving means capable of transmitting / receiving data to / from the outside using the second communication channel, wherein the information selecting means selects necessary information from the plurality of pieces of index information. Receiving information indicating the current position of the mobile terminal from the positioning means, and setting the current position of the mobile terminal Select the index information meets, is the information selection means passes the identification symbol of the selected index information to said transmitting and receiving means, when said reception means receives said identification code from said information selecting means,
A mobile terminal requesting information corresponding to the identification code from outside. 2. The system according to claim 1, wherein said index information further includes a constraint on time, and said information selecting means further satisfies said constraint on time when said information selecting means selects necessary information from said plurality of index information. The mobile terminal according to claim 1, wherein is added as a criterion. 3. The information selection means, when passing the identification symbol of the selected index information to the transmission / reception means, simultaneously passes information on a current position received from the positioning means, and the transmission / reception means transmits the information to the outside. The mobile terminal according to claim 1, wherein, when requesting information corresponding to the identification symbol, the information on the current position is transmitted together with the identification symbol. 4. The mobile terminal further comprises user interface means capable of outputting information to a user and inputting information from the user, wherein the information selection means selects the index information when the user interface means selects the index information. The mobile terminal according to claim 1, 2 or 3, wherein the mobile terminal allows the user to select the index information. 5. The mobile terminal further comprises a non-volatile memory which is a storage device whose storage is not erased even when there is no power supply, and the information selection means holds the information just before the mobile terminal stops its function. A plurality of index information is stored in the non-volatile memory, and when the mobile terminal starts its function, the information selecting means extracts and uses the plurality of index information from the non-volatile memory. The mobile terminal according to claim 1, 2, 3, or 4, wherein 6. The communication system according to claim 1, wherein said first communication channel is communication using radio waves having a frequency of 50 MHz or more and 300 MHz or less.
Or the mobile terminal according to 5. 7. An area-limited information database which is a database for storing area-limited information which is information for which accessibility is defined by a restriction on a position, receiving the area-limited information from the area-limited information database, Index creating means for creating index information including at least a constraint on the position of the limited information and an identification symbol that is a symbol for uniquely identifying the area limited information,
An index transmitting unit that receives the index information from the index creating unit and performs simultaneous broadcast via a first communication channel, and an access request from the mobile terminal to the regional limitation information database via a second communication channel. Receiving information on the current location of the mobile terminal, extracting the local limitation information from the regional limitation information database according to the access request, and determining whether the current location of the mobile terminal satisfies the constraint on the location related to the regional limitation information. An information distribution device, comprising: a transmission / reception unit that determines whether or not the mobile terminal has reached the area limitation information only when the condition is satisfied. 8. The access restriction to the area-limited information is further defined by a restriction on time, the index information further includes a restriction on time, and the transmitting / receiving means restricts a position related to the area-limited information. When it is determined whether or not is satisfied by the current location of the mobile terminal, it is further determined whether or not the constraint on the time related to the area limitation information is satisfied by the current time, and any constraint is also satisfied. The information distribution apparatus according to claim 7, wherein the local limitation information is returned to the mobile terminal only when the information is transmitted. 9. The information distribution apparatus further comprises a registration unit for registering information in the regional limitation information database, and when the registration unit issues a registration request for regional limitation information to the regional limitation information database, 9. The information distribution apparatus according to claim 7, wherein the limited information database sends the index information related to the area limited information to the index creating unit. 10. The information distribution apparatus according to claim 6, wherein the first communication channel uses radio waves having a frequency of 50 MHz or more and 300 MHz or less. 11. A recording medium on which a program for controlling a mobile terminal which receives information from the outside through communication is recorded and which can be read by the mobile terminal. First program code means for receiving index information including at least a position constraint using a first communication channel, second program code means for measuring the current position of the mobile terminal, and the index information A plurality of holding, a third program code means for selecting only the index information that the current position of the mobile terminal satisfies the position constraint from among the plurality of index information, the third program code means of the selected index information And a fourth program code means for transmitting the identification symbol to the outside using the second communication channel. Characterized in that, readable recording medium in the mobile terminal. 12. The index information further includes a constraint on time, and the third program code means selects only index information whose current position of the mobile terminal satisfies the position constraint from among the plurality of pieces of index information. 12. The recording medium readable by the mobile terminal according to claim 11, wherein, when selecting the information, only index information that satisfies the time constraint is selected. 13. The fourth program code means transmits information relating to the current location of the mobile terminal to the outside using the second communication channel together with the identification symbol of the selected index information. The recording medium readable by a mobile terminal according to claim 11, wherein: 14. A fifth program code means for allowing a user of the mobile terminal to select only specific index information from the index information selected by the third program code means, further recorded therein. The fourth program code means may transmit the identification symbol relating only to the specific index information selected by the user by the fifth program code means to the outside using the second communication channel. Claim 11, characterized in that:
14. The recording medium readable by the mobile terminal according to 12 or 13. 15. A sixth program code means for storing the plurality of index information held by the third program code means in an external storage device immediately before the function of the mobile terminal is completed, and a function of the mobile terminal. And a seventh program code unit that retrieves the plurality of pieces of index information from the external storage device immediately after the start of the process and causes the third program code unit to use the plurality of pieces of index information. 15. The recording medium readable by the mobile terminal according to claim 12, 13, 13, or 14. 16. A computer-readable recording medium on which a program for distributing information to a mobile terminal using communication is recorded. Receiving the area limitation information from the area limitation information database, which is a database for storing information, and obtaining index information including at least a constraint on the position of the area limitation information and an identification symbol that is a symbol for uniquely identifying the area limitation information. First program code means for creating, second program code means for broadcasting the index information via a first communication channel, and the area limitation information database from a mobile terminal via a second communication channel A request for access to the mobile terminal and information on the current location of the mobile terminal. The regional limitation information is extracted from the regional limitation information database according to, and the restriction on the position related to the regional limitation information is determined whether or not the current position of the mobile terminal satisfies the condition. A computer-readable recording medium, wherein a third program code means for returning the area limitation information is recorded on the mobile terminal. 17. The access to the area-limited information is further defined by a time constraint, and the first program code means creates the area-limited information when creating the index information of the area-limited information. When the third program code means retrieves the regional limitation information from the regional limitation information database in accordance with the access request, the constraint relating to time is included in the in-desk information, and the constraint relating to time is included in the in-desk information. It is further determined whether or not it is satisfied at the time of the time, and only when both of the constraint on the time and the constraint on the position are satisfied, returning the area limitation information to the mobile terminal. Features,
A computer-readable recording medium according to claim 16. 18. A fourth program for passing said index information relating to said area limitation information to said first program code means or said second program code means when registering area limitation information in said area limitation information database. 18. The computer readable recording medium according to claim 16 or 17, wherein the recording medium is recorded together with code means.