JP2003333653A - Information delivery system, method of generating delivery schedule therein, and terminal thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information delivery system, a method of generating a delivery schedule therein, and a terminal thereof, which achieve both improvement of delivery efficiency and satisfaction of users in a high level. <P>SOLUTION: When a delivery schedule of radio delivery of delivery information from one base station 1 to a plurality of terminals 2 will be generated, the delivery schedule is generated on the basis of a service rate representative of a ratio of delivery information actually received by each terminal 2 to the delivery information requested to the base station 1 from the terminal 2. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information distribution system for wirelessly distributing distribution information from a single base station to a plurality of terminals, and particularly considering both user satisfaction and distribution efficiency. The distribution information can be distributed according to the distribution schedule.

[0002]

2. Description of the Related Art In recent years, due to advances in digital processing technology, miniaturization and high performance of information communication / playback equipment, and diversification of communication media, distribution information (hereinafter referred to as content data) such as music, video, character information, etc. An information distribution system has been developed in which information is distributed to individuals through communication lines. As a communication method of the information distribution system, one-to-one communication is established and information is distributed in response to the request for the end of the information, or the same content data is simultaneously sent from the base station to the end of the information. Although it may be distributed (broadcast), from the viewpoint of more efficiently utilizing limited communication resources and distributing information at high speed to a plurality of the above end points,
The latter broadcasting type communication method is superior. However,
In the broadcast type information delivery system, the content data having the same content is delivered to a plurality of the end points according to a predetermined delivery schedule. Satisfaction will vary. Therefore, Japanese Patent Laid-Open No. 2001-2001
According to Japanese Patent No. 308808, attribute information (preference information) representing content data desired to be distributed by a user who possesses an end point is preset for each user, and when the base station broadcasts (generates a distribution schedule). , An information distribution system for generating a distribution schedule based on preference information of the end (user) in the wireless area of the base station and distributing content data. As a result, it becomes possible to generate a delivery schedule that is preferentially delivered from the content data requested by many users, and the delivery efficiency of the content data (how many users request by one delivery Can be improved) and limited communication resources can be used more effectively.

[0003]

However, the technique disclosed in the above publication is advantageous in terms of delivery efficiency and satisfies the satisfaction of many users, since the delivery schedule is generated by a so-called majority vote. It is difficult to satisfy the satisfaction of users who request unpopular content data, and the problem that the satisfaction among users who possess the above-mentioned end points varies is not solved. Therefore, the present invention is
The present invention has been made in view of the above circumstances, and an object thereof is to provide an information distribution system that can improve distribution efficiency and user satisfaction at a high level at the same time, a distribution schedule generation method thereof, and its end points. To provide.

[0004]

In order to achieve the above object, the first invention of the present application is an information distribution system for wirelessly distributing distribution information from one base station to a plurality of terminals. A service rate calculating means for calculating a service rate, which is a ratio of the distribution information actually received by the terminal, out of the distribution information requested by the terminal to the base station. And an information distribution system comprising: a distribution schedule generating means for generating a distribution schedule of the base station based on the service rate calculated for each end by the service rate calculating means. To be done. For example, as the configuration of the delivery schedule generating means, a request weight calculating means for calculating a request weight for each end from the service rate calculated for each end, and a calculation for the request weight calculating means by the request weight calculating means And a sum total calculation means for calculating the sum of the request weights for each of the distribution information and summing the request weights for each distribution information requested to the base station. A configuration is conceivable in which the distribution schedule of the base station is generated based on the total sum of the request weights calculated by the means.
In this way, by generating the delivery schedule in consideration of the service rate (satisfaction degree for each user) for each end, all users can be delivered without sacrificing delivery efficiency in delivery of delivery information by one-to-many wireless communication. It is possible to equalize the degree of satisfaction (quality of service).

Further, there is provided an information distribution system in which the service rate calculation means is provided at each end and the delivery schedule generation means is provided at the base station, and the end is provided in the base station. The predetermined reference information including the service rate calculated by detecting that the user has entered the wireless communication area is transmitted to the base station, and the base station receives the predetermined reference information from the end. It is also conceivable that the delivery schedule is generated on the basis of the service rate of each undelivered end included in the received predetermined reference information, while recognizing the undelivered end that has entered the wireless communication area. With such a configuration, since the distribution information is distributed according to the distribution schedule organized based on the service ratio of the endless existing in the wireless communication area of the base station, one-to-many wireless (broadcast) distribution information is distributed. However, it is possible to deliver information that meets the needs of individual users existing in the communication area with the base station at any given time.

Further, a configuration is conceivable in which the upper limit of the request weight calculated by the request weight calculating means for each unfinished end can be arbitrarily set for each unfinished end. In such a form, it is possible to give priority to the terminal (user) existing in the wireless communication area of the base station, and the terminal (user) having a higher priority requests the terminal. The distribution information can be preferentially distributed.

Furthermore, it is conceivable that the distribution information is classified into attributes and the service rate is calculated for each attribute. As a result, the terminal (user) can specify a desired genre by designating a general attribute (genre) such as "classical music" or "Western music" without specifying the requested distribution information in detail. It becomes possible to receive the above-mentioned delivery information to which it belongs, which is more useful.

A second invention is a distribution schedule generating method applied to the information distribution system according to the first invention. Furthermore, the third aspect of the invention does not yet constitute the information distribution system according to the first aspect of the invention.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments and examples of the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention. It should be noted that the following embodiments and examples are merely examples embodying the present invention and are not of the nature to limit the technical scope of the present invention. Here, FIG. 1 is a schematic configuration diagram of an information distribution system Z1 according to an embodiment of the present invention, and FIG. 2 is a schematic diagram of a base station 1 and a terminal 2 which constitute the information distribution system Z1 according to an embodiment of the present invention. FIG. 3 is a block diagram showing a configuration, FIG. 3 is a flowchart showing an information delivery processing procedure in the information delivery system Z1 according to the embodiment of the present invention, FIG. 4 is a configuration diagram of transmission data, FIG. 5 is a frame configuration diagram of transmission data, and FIG. 6 is a configuration diagram of distribution request data, FIG. 7 is a flowchart showing a distribution schedule determination processing procedure by the distribution schedule generation unit, FIG. 8 is a diagram showing an example of a function for calculating a request weight, and FIG. 9 is a charging information management server. FIG. 6 is a diagram showing an example of management information regarding distribution contents in FIG.

Information distribution system Z1 according to the present embodiment
As shown in FIG. 1, is composed of a terminal 2, a base station 1, and a server 3. Further, the terminal 2 and the base station 1 further have a configuration as shown in FIG. Figure 1
As shown in FIG. 3, a plurality of base stations 1 installed at a place where people gather, such as a station, are connected to the server 3 by, for example, a dedicated communication line 4. The base station 1 and the terminal 2 are SS (Sprea) using the 2.4 GHz band, for example.
It has a wireless communication function using d Spectrum communication, and each has a wireless communication area with a radius of about 50 m. The terminal 2 is not carried by a user registered in advance, and high-speed wireless communication with the base station 1 is possible within the wireless communication area of the base station 1. The configuration of the server 3, the base station 1, and the terminal 2 will be described in more detail.

(Server 3) As shown in FIG. 1, the server 3 is composed of a content server 3a and a billing information management server 3b. The server 3 may be physically configured by one computer or a plurality of computers. Here, the content server 3a
Various content data to be distributed to the user are stored in the compressed data in a predetermined format. As the types of content data to be stored, for example, image contents such as still images and moving images, music contents and composite contents thereof, character / audio contents such as news, and the like can be considered. Various sources can be considered as the information sources of these content data, such as digitized analog voices of the Internet, music CDs, FM broadcasts and the like. It is also possible to generate audio content from a text document using, for example, Text-ToSpeech. If the content data is audio information such as music, TwinVQ, MP3, AAC, WAV
A compression method such as can be used. The content server 3b stores the attribute information of each content data together with each content data. Here, the above-mentioned attribute information is a proposition related to the content, such as "is news" and "is classical music", and is set for each content data. The billing information management server 3b manages billing information for each user. Details of the charging process will be described later.

(Base Station 1) As shown in FIG. 2, the base station 1 includes a communication control unit 11 and a content data storage unit 1
2, a distribution schedule generation unit 13, and a transmission / reception unit 14 are provided. The communication control unit 11
Controls communication with the server 3. The content data storage unit 12 stores, for example, content data periodically transferred from the content server 3b and its attribute information. The content data transferred from the content server 3b to the content data storage unit 12 is selected in consideration of the delivery record of each base station 1, for example. For example, to the base station 1 that has many classical music distributions and few pops distributions, a large amount of content data belonging to classical music and a small amount of content data belonging to pops are transmitted according to the distribution record, and content data storage is performed. It is stored in the unit 12.

Further, the distribution schedule generating section 13
Recognizes the terminal 2 which is in a state where information can be received at present based on an identification ID (details will be described later) transmitted from the terminal 2 which has entered the wireless communication area of the base station 1. A content data distribution schedule is generated based on the requested content ID (details will be described later) and the service rate (details will be described later) transmitted together with the identification ID. In this way, in order to recognize the endless 2 existing in the limited wireless communication area with a radius of about 50 m and generate the distribution schedule of the content data based on the requested content ID and the service rate for each endless 2 thereof,
The generated distribution schedule is more suited to the tastes of users who have no end in each end compared to the conventional broadcasting type information distribution in a wide area, and makes the service rate (quality of service) to all users uniform. Can be made to. When the distribution schedule is determined, the distribution schedule generation unit 13 generates transmission data according to the distribution schedule. As shown in FIG. 4, this transmission data is composed of content data and its content management information. The content management information is composed of the title of the content, the attribute information, an identification ID for identifying the end 2 which can receive the transmission data, and the like.

Further, the transmission / reception unit 14 has a terminal 2
Control wireless communication with. When the delivery request data (see FIG. 6, details will be described later) transmitted when the terminal 2 enters the wireless communication area of the base station 1 is received, the transmission / reception unit 14 generates an interrupt to deliver the delivery. The identification ID, the requested content ID, and the service rate in the request data are transmitted to the distribution schedule generation unit 13, and the reproduction record is transmitted to the billing information management server 3b. In addition, the transmission data transmitted from the distribution schedule generation unit 13 is transmitted to each end not two. here,
As shown in FIG. 5, the transmission data is divided into fixed-length frames, each of which is sent with a header portion made up of frame information (what number of frames in the total) and error detection code such as CRC. It When the transmission data is transmitted, the distribution record (for example, the end ID of the distribution partner, the ID of the distributed content data, the distribution date and time, etc.) is stored in the charging information management server 3b and is used in the charging process described later. To be The content data is compressed using TwinVQ or the like as described above, and data transmission from the base station 1 to the terminal 2 is performed at high speed (for example, about 5 Mbps) using the 2.4 GHz band. 30 minutes of news voice can be transmitted in about 4 seconds, and 5 minutes of music can be transmitted in about 5 seconds. Therefore, the terminal 2 can receive a sufficient amount of content data while staying in the wireless communication area having a radius of about 50 m.
Of course, since it is delivered in broadcast format at each end,
There is no waiting time.

(End 2) The end 2 is, as shown in FIG. 2, a transmission / reception unit 21, a temporary data storage unit 22, a data storage medium 23, a reproduction module 24, an ID storage unit 25, a content storage module 26, It comprises a preference information storage unit 27, a reproduction result recording storage unit 28, and a service rate storage unit 29. Here, as the data storage medium 23, it is desirable to use a removable non-volatile memory such as a smart medium or a compact flash (registered trademark of SanDisk Corporation). For example, a built-in flash memory or DRAM
It is also possible to use Transmission and reception unit 2 above
1 controls wireless communication with the base station 1. The transmission / reception unit 21 is in a radio wave standby state when processing such as restoration and reproduction of received data described later is not performed. When a radio wave from the base station 1 is detected in this standby state (that is, when it is detected that the end 2 has entered the wireless communication area of the base station 1), the ID stored in the ID storage unit 25 is stored in advance. Endless 2 (or its user) ID
And a request content ID that is stored in advance in the preference storage unit 27 and that identifies the content requested by the user,
Distribution request data (see FIG. 6) including a service rate (described later) stored in the service rate storage unit 29 and a reproduction result record (described later) stored in the reproduction result record storage unit 28. ) Is transmitted to the base station 1, reception of the transmission data transmitted from the base station 1 is started, and it is sequentially stored in the temporary data storage unit 22. As a method of detecting entry into the wireless communication area of the base station 1, for example, a digital value of the electric field strength is monitored by an electric field strength detection circuit, and the electric field strength value for a certain period and its statistical value (average, It is conceivable to judge that the wireless communication area of the base station 1 has been entered (that is, communication with the base station 1 is possible) when a predetermined evaluation value based on (dispersion, etc.) exceeds a threshold value. Further, an error check is performed by an error detection code such as a CRC flag embedded in the header portion of the data received from the base station 1, and when it is determined that there is no error, it is determined that communication with the base station 1 is possible. May be.

The content storage module 26 stores, in advance, in the ID storage unit 25, for each content data in which all frames have been normally received from the transmission data sequentially stored in the temporary data storage unit 22. Only the content data addressed to itself is selectively stored in the data storage medium 23 on the basis of the endless identification ID and the management information of the content included in the received content data. As described above, the content data transmitted from the base station 1 is distributed according to the distribution schedule determined based on the service rate of the end-to-end existing in the wireless communication area of the base station 1. Not all the content data to be processed are destined for the user whose end is not two. Therefore, when the content storage module 26 does not include its own identification ID in the identification ID for specifying the end 2 that can receive the content data set in the content management information. , The content data is not saved and is discarded. As a result, it is possible to prevent the content data distributed to one end 2 (user) from being stored and reproduced in the other end 2. In other words, with such a configuration, while taking the form of broadcasting-type information distribution, one-to-one
Similar to the information distribution described in (1), it is possible to simultaneously achieve the function of distributing content only to a specific end user (user).

The reproduction module 24 restores and reproduces the content data stored in the data storage medium 23 in response to a reproduction request from the user. When the reproduction of the content data is completed, the reproduction module 24
Writes the ID of the content data as a reproduction record into the reproduction record storage unit 28. That is, the content data in which the ID is recorded in the reproduction record storage unit 28 is the content data that has been normally received and reproduced by the end 2 concerned. As described above, when the terminal 2 enters the wireless communication area of the base station 1,
By transmitting the reproduction record together with the identification ID to the base station 1, the base station 1 side can recognize that the transmitted content data is normally received and reproduced. The billing information management server 3b performs billing processing based on the reproduction record. A specific example of the charging process will be described later.

The service rate storage unit 29 stores the frequency (request record) of the distribution request data transmitted from the transmission / reception unit 21, and the reproduction record record (reproduction record) stored in the reproduction record storage unit 28. Of the content data requested by the terminal station 2 to the base station 1, the service rate representing the ratio of the content data actually received by the terminal station 2 is calculated. As described above, when the terminal 2 enters the wireless communication area of the base station 1, the service rate is calculated along with the identification ID.
By transmitting to the base station 1 side, it becomes possible for the base station 1 side to recognize the service rate of each end in the wireless area, and the distribution such that the service rate between the end two in the wireless area becomes uniform. Generate a schedule. A specific example of the distribution schedule generation process will be described later.

Next, the delivery schedule generation procedure and the charging process will be described in detail. (Distribution Schedule Generation) In the present embodiment, the distribution schedule generation unit 13 provided in the base station 1 generates a distribution schedule for each terminal 2 based on the service rate calculated in the service rate storage unit 29. The feature is to do. More specifically, the delivery schedule generation unit 13 calculates a request weight for each end 2 from a service rate calculated for each end 2 and a end calculated by the request weight calculator. And a sum total calculating means for calculating the sum total of the request weights for each of the content data requested by the base station 2, and calculating the sum of the request weights for each of the content data. The distribution schedule is generated based on the sum of the calculated request weights. Here, a procedure for generating a distribution schedule based on the service rate by the distribution schedule generating unit 13 will be described with reference to FIG. 7. FIG. 7 shows an example in which four users (users 1 to 4) carrying the terminal 2 exist within the wireless area of a certain base station 1. In the initial state, the service ratios of all users are set to 0 (no reception or reproduction record) and are set to the same. First, the delivery schedule generation unit 13 determines whether or not each end 2 is present based on the service rate included in the transmission request data (see FIG. 6) received from the end 2 currently in the wireless communication area. The request weight is calculated (S50) (corresponding to request weight calculating means). Here, the request weight is defined to take a large value as the service rate decreases, and is, so to speak, an index indicating the dissatisfaction degree of the user. As the calculation method, it is possible to use the reciprocal of the service rate, but in this embodiment, as shown in FIG. 8, a stepwise function is used and the maximum value of the calculated request weight is set to 1000. In this case, since the service rates for all the above-mentioned end points 2 are 0, the calculated request weights are all 1000. next,
The delivery schedule generation unit 13 uses the step S5.
The request weight for each end 2 calculated by 0 is totaled for each content data, the content having the maximum value is selected, and the content to be distributed first is determined (S51).
(Corresponds to the total sum calculation method). Here, since the request weights of all users are the same (1000), the sum of the request weights for “News” requested by users 1 to 3 (100
0 + 1000 + 1000 = 3000) is the sum of request weights for “Rakugo” requested only by the user 4 (100).
0), just like in the case of a simple majority vote, "New
"s" is selected and delivered. Next, consider a situation in which the users 1 to 3 normally receive the content data by the first distribution (“News” in the case of the same figure), and the service ratio among the users varies. First, as in step S50, the distribution schedule generating unit 13 determines, for each terminal 2, each of the terminals 2 based on the service rate included in the transmission request data received from each of the terminals 2 currently in the wireless communication area. Calculate the required weight (S5
2) (corresponds to request weight calculation means). Here, "New
As described above, the distribution of “s” has been completed once and the service rates of the users 1 to 3 have become 1, so that the calculated request weight has also changed to 1. Further, since "Rakugo" has not been delivered, the request weight calculated for the user 4 remains 1000. Next, the distribution schedule generation unit 13 aggregates the request weights calculated for each terminal for each end 2 calculated in step S52 for each content data, and selects the content having the maximum weight, as in step S51. The content to be distributed to (S53)
(Corresponds to the total sum calculation method). Here, the sum of request weights of “Rakugo” requested by the user 4 (1000) is the user 1
Sum of "News" required by ~ 3 (1 + 1 + 1 = 3)
"Rakugo" is selected as the content data to be distributed this time. As a result, the service rate of all users becomes 0.5 (one reception or reproduction record is obtained for two distribution requests), and the quality of service for all users is made uniform. (S54) When the distribution schedule is generated according to such a procedure, as shown in the figure, when there is no variation in the service rate (dissatisfaction degree) between users (S50, S51),
When the distribution schedule is generated by mere majority, and there is variation in the service rate (frustration) among users (S5).
2, S53), it is possible to generate a delivery schedule in consideration of the decrease in the service rate of the user (increased dissatisfaction). Therefore, according to the present embodiment, by recognizing the end 2 which is present in the wireless communication area and by generating the distribution schedule of the content data based on the service rate calculated for each end 2, The generated distribution schedule has higher distribution efficiency that matches the tastes of each end user compared to the conventional broadcast-type information distribution, and at the same time uniforms the quality of service to all users. Can be done.

(Billing Process) In order to bill the content data for distribution, it is necessary to confirm that the content data is normally distributed. This is because even if the distribution side distributes the content data, if it is not normally received by the reception side, it is not appropriate to charge. This is a particularly important issue in wireless information distribution, which is prone to transmission errors.
Of course, even in the case of wireless information distribution, if it is distribution by one-to-one communication, it is possible to always check the transmission error, and there is no particular problem. However, in the information distribution system Z1 according to the present embodiment, since the content data is distributed from the base station 1 to the terminals 2 in the broadcast format as described above, the content data distribution is basically normal. It is not possible to confirm at that point whether or not it was possible. Therefore, the information delivery system Z1 according to the present embodiment solves this problem by the following method. As described above, when the terminal 2 enters the wireless communication area of the certain base station 1, it notifies the base station 1 of its existence and distributes the content data, and thus includes its own identification ID and the like. The distribution request data is transmitted to the base station 1. Therefore, in this distribution request data,
ID of content data that was successfully received and played in the past
By including the reproduction result record consisting of, the base station 1 side is made to recognize whether or not the content data transmitted in the past is normally received and reproduced.

The distribution request data transmitted from the terminal 2 to the base station 1 is configured as shown in FIG. 6, for example. Upon receipt of the distribution request data 1, the base station 1 transmits the reproduction record in the distribution request data 1 to the billing information management server 3b. The billing information management server 3b collates the past distribution record of the content data with the above-mentioned reproduction record, and performs the billing process for the one that matches them. Figure 9
It is an example of management information about distribution contents in the billing information management server 3b. This management information includes a recognition ID
The content delivery record (content ID, delivered base station ID, delivery date and time) is recorded for each, and the playback record corresponding to it (content ID, base station ID that received this playback record, playback record) Record reception date and time)
Will be recorded later. In the example of FIG. 9, the content data JPOP111 and JPOP1 distributed to the end XYZ1
Of the 23, the reproduction record has been confirmed for JPOP123, but the reproduction record has not been confirmed for JPOP111 (delivery error or unreproduced). Therefore, of these two contents data, only JPOP 123 is processed as a charging target. Further, in the above example, the charging process is performed based on the reproduction record indicating that the content data has been reproduced on the end 2 side, but, for example, the reception record indicating that the reception is normally performed. The charging process may be performed based on the record. As described above, by transmitting the past reproduction record or the like from the terminal 2 to the base station 1, it is impossible to confirm whether or not the transmitted data is normally received by the receiving side. It is possible to eliminate the shortcomings of broadcasting-type information distribution and perform correct billing processing.

Next, a series of data distribution procedures in the information distribution system Z1 according to the present embodiment will be described with reference to the flow chart shown in FIG. The content data and its attribute information to be delivered to the end 2 are stored in the content server 3b of the server 3,
They are managed, and some of them are periodically transmitted to the base station 1 (S31 → S11). The content data transferred from the content server 3b to the base station 1 is selected in consideration of, for example, the delivery record of each base station. The content data and its attribute information transmitted from the content server 3b are stored in the base station 1
Are stored in the content data storage unit 12 of FIG. In the case of the terminal 2, the transmission / reception unit 21 is in a radio wave standby state when processing such as reproduction of content data is not performed (S21). When a radio wave from the base station 1 is received in this standby state (that is, when it is detected that the terminal 2 has entered the wireless communication area of the base station 1), the transmission / reception unit 21 transmits to the base station 1. The distribution request data (see FIG. 6) is transmitted to the server (S22). When the base station 1 receives the distribution request data from the terminal 2 (S12), the reproduction record therein is transmitted to the billing information management server 3b (S13). The billing information management server 3b, which has received the reproduction record, collates the distribution record of the past content data with the reproduction record, and performs the charging process as described above when they match (S32).

In the base station 1, the distribution schedule generation unit 13 generates a distribution schedule of the content data based on the service rate in the distribution request data (S15), and the content data and the content thereof are distributed according to the distribution schedule. Transmission data (FIG. 4) including management information is generated (S16). Here, in the content management information, in addition to the attribute information of the content data, an unidentified identification ID for identifying the unreceivable edge of the content data is stored. The generated transmission data is divided into fixed-length frames, each of which is sent with a header portion including frame information (total number of frames and the number of all frames) and an error detection code such as CRC (S17). Then, the delivery record (for example, the end ID of the delivery partner, the ID of the delivered content data, the delivery date and time, etc.) is stored in the billing information management server 3b as a delivery record storage and used for the billing process (S3).
4). When the terminal 2 receives the transmission data, it temporarily stores it in the temporary data storage unit 22 (S23).
Then, the content storage module 26 stores only the content data addressed to itself among the transmission data sequentially stored in the temporary data storage unit 22 in the data storage medium 23.
(S24). After that, when a reproduction request is input from the user, the reproduction module 24 restores and reproduces the content data stored in the data storage medium 23 (S25). When the reproduction of the content data is completed, the reproduction module 24 writes the ID of the content data in the reproduction record storage unit 28 as a reproduction record (S26). Further, the service rate storage unit 29 calculates the service rate based on the request record to the base station 1 and the content data generation record,
Remember. (S27) The reproduction record and service rate are incorporated into the distribution request data and transmitted to the base station 1 in the next transmission of the distribution request data (S22).

[0024]

[Embodiment] In the above embodiment, the service rate is calculated for each content data, and the distribution schedule is generated for each content data. However, the service rate does not have to be calculated for each content data, and may be calculated for each attribute information corresponding to each content data. In such a form, for example, in the case of a genre such as “music” including a plurality of contents, a request is made for each attribute information such as “Japanese music” or “classic” requested by each user. The weights (priorities) are aggregated, and the distribution schedule can be generated according to the contents belonging to each genre.

Further, in the above-mentioned embodiment, the upper limit value of the weighting factor of each user is the same (1000 in FIG. 7), but the upper limit value of the weighting factor can be arbitrarily set for each user. For example, if the upper limit of the weighting coefficient is set to be variable according to the annual membership fee, etc., it is possible to realize a service that preferentially delivers content data requested by a user who pays a large amount of the annual membership fee. A highly reliable information distribution system can be constructed.

[0026]

As described above, according to the present invention,
By distributing information in a broadcast format using radio,
In an information distribution system that distributes a large amount of distribution information to a plurality of users at the same time, it recognizes edges that exist in the wireless communication area of a base station, and distributes information according to a delivery schedule that is organized based on the service rates of those edges. By delivering, it is possible to deliver information that meets the needs of individual users even though it is broadcast format information delivery, and the quality of service to all users can be made uniform.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an information distribution system Z1 according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a schematic configuration of a base station and an end of the information distribution system Z1 according to the embodiment of the present invention.

FIG. 3 is a flow chart showing an information distribution processing procedure in the information distribution system Z1 according to the embodiment of the present invention.

FIG. 4 is a configuration diagram of transmission data.

FIG. 5 is a frame configuration diagram of transmission data.

FIG. 6 is a configuration diagram of distribution request data.

FIG. 7 is a flowchart showing a delivery schedule determination processing procedure by a delivery schedule generation unit.

FIG. 8 is a diagram showing an example of a function for calculating a request weight.

FIG. 9 is a diagram showing an example of management information regarding distribution contents in the billing information management server.

[Explanation of symbols]

Z1 ... Information distribution system 1 ... Base station 2 ... 3 ... Server 4 ・ ・ ・ Private line 11 ... Communication control unit 12 ... Content data storage unit 13 ... Delivery schedule generation unit 14 ... Transmit / receive unit 21 ... Transmit / receive unit 22 ... Temporary data storage unit 23 ... Data storage media 24 ... Playback module 25 ... ID storage unit 26 ... Content storage module 27 ... Preference information storage unit 28 ... Reproduction record storage section 29: Service rate storage unit S1, S2 ... Order of processing procedures (steps)

Claims (11)

[Claims] 1. An information distribution system for wirelessly distributing distribution information from one base station to a plurality of terminals, the terminals among the distribution information requested by the terminals to the base station. Based on the service rate calculated by the service rate calculation means for calculating the service rate, which is the ratio of the distribution information actually received by each terminal, and the service rate calculated by the service rate calculation means for each terminal. An information distribution system comprising: a distribution schedule generating means for generating a distribution schedule of a base station. 2. The request schedule calculation means calculates a request weight for each end from the service rate calculated for each end, and the request weight calculation means calculates the request weight for each end. The request weight for each end is totaled for each of the distribution information requested to the base station,
The distribution schedule of the base station is generated based on the total sum of the request weights calculated by the total sum calculation means, the total sum of the request weights for each distribution information. Information distribution system. 3. An information distribution system in which the service rate calculation means is provided at each end and the distribution schedule generation means is provided at the base station,
The terminal sends predetermined reference information including the service rate calculated by detecting that the terminal has entered the wireless communication area of the base station to the base station, and the base station The delivery schedule is recognized based on the predetermined reference information received from the unidentified end, which has entered the wireless communication area, and the service rate of each end not included in the received predetermined reference information. The information distribution system according to claim 1, wherein 4. The information distribution system according to claim 2, wherein the upper limit of the request weight calculated by the request weight calculating unit for each end is set arbitrarily for each end. . 5. The information distribution system according to claim 1, wherein the distribution information is classified into attributes, and the service rate is calculated for each attribute. 6. A distribution schedule generation method of an information distribution system for wirelessly distributing distribution information from one base station to a plurality of terminals, wherein the distribution information requested by each terminal to the base station. A service rate calculating step of calculating a service rate, which is the ratio of the distribution information actually received by the terminal, and a service calculated by the terminal in the service rate calculating step. And a delivery schedule generating step of generating the delivery schedule of the base station based on the rate. 7. The request schedule calculation step of calculating a request weight for each end from the service ratio calculated for each end, and the distribution schedule generating step calculated by the request weight calculation step. The request weight for each end is totaled for each of the distribution information requested to the base station,
7. A sum total calculation step of calculating a sum total of request weights for each distribution information, wherein the distribution schedule of the base station is generated based on the sum total of request weights calculated in the sum total calculation step. Delivery schedule generation method. 8. A distribution schedule generating method, wherein the service rate calculating step is performed in each of the terminals, and the distribution schedule generating step is performed in the base station, wherein the terminal is in the base station. The predetermined reference information including the service rate calculated by detecting that the user has entered the wireless communication area is transmitted to the base station, and the base station receives the predetermined reference information from the end. The delivery schedule of the base station is generated on the basis of the service rate of each end not included in the received predetermined reference information, while recognizing the end not entering the wireless communication area based on 6. The delivery schedule generation method according to either 6 or 7. 9. The distribution schedule generation according to claim 7, wherein the upper limit of the weighting coefficient calculated for each end of the request in the request weight calculation step can be arbitrarily set for each end. Method. 10. The distribution schedule generating method according to claim 6, wherein the distribution information is classified into attributes, and the service rate is calculated for each attribute. 11. The ratio of the distribution information actually received among the distribution information requested to the base station, which is not enough to receive the distribution information wirelessly distributed from the base station. A service rate calculating means for calculating a certain service rate, and predetermined reference information including the service rate calculated by the service rate calculating means upon detecting that the wireless communication area of the base station is entered, To all the wireless communication areas according to the reference information transmitting means for transmitting to the base station and the distribution schedule organized based on the end-to-end service rate recognized by the reception of the predetermined reference information from the base station. Distribution information receiving means for receiving the above-mentioned distribution information that is transmitted all at once to the end,
The end is characterized by having