JP2002230417A - Method and device for introducing recommended item, and recording medium with the recorded recommended item introducing program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recommended item system which can gather a large amount of information for analysis and clearly show user's taste. SOLUTION: An access history processing part 11 generates an access history map, by receiving a client's access history sent by an item provider server 2 and an access history map managing part 12 stores it. A user input/output processing part 13 receives an item evaluation recording request from a client 3. An item evaluation recording part 15 records an item evaluation value. The user input/output processing part 13 receives a recommended item introduction request from the client 3, and a recommendation introducing processing part 14 generates a recommended item list according to he evaluated values of items and the access history and sends it to the client 3 via the user input/output processing part 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method and a system for introducing recommended items to a client via a network.

[0002]

2. Description of the Related Art In a conventional recommended item introduction method, an evaluation value for an item is used as "user preference estimation factor information" and "information to be analyzed". For example,
The degree of interest in a book or the like is selected from “dislike”, “dislike”, “neither”, “like”, “love”, etc., and the client inputs the degree.

[0003]

In the above-mentioned conventional method, the evaluation value is input as "user preference estimation factor information" indicating the user's preference, and the evaluation value of another person is input as "information to be analyzed". Is used to pick up a group of clients performing the same evaluation using a general correlation analysis method, etc., and to introduce a list of items that the same client group commonly evaluates highly. Since it takes time and effort to input, there is a problem that the number of pieces of information (user preference estimation factor information) to be analyzed is small.

On the other hand, a recommended introduction method using the browsing / purchasing history of items as “user preference estimation factor information” and “information based on analysis” is disclosed in Japanese Patent Application No. 2000-209.
827: Recommended information introduction method, recommended information introduction system, recording medium recording recommended information introduction program "
Is easy to collect a large amount of “information to be analyzed” because there is no need to input the evaluation, but it is difficult to explicitly indicate the user's preference in the “user preference estimation factor information”. was there.

Further, according to the above-mentioned conventional method, 10
It is possible to collect the access history of about 100,000 users and introduce recommended items.
It is difficult to collect the access histories of clients such as 100 million people because of the huge number of them because of network load, server processing capacity, and the like.

It is an object of the present invention to provide a recommended item introducing method, a recommended item introducing apparatus, and a recommended item introducing method capable of collecting a large amount of "information to be analyzed" and explicitly indicating user's preference. An object of the present invention is to provide a recording medium on which an item introduction program is recorded.

Another object of the present invention is to provide a recommended item introducing method and a recommended item introducing apparatus capable of providing a service to an enormous number of clients while suppressing required network load and server processing capacity. And a recording medium on which a recommended item introduction program is recorded.

[0008]

In order to solve the above problems, the present invention provides (a) an item provider server which provides an item to a plurality of clients via a network; Receiving the history, converting it into an access history map suitable for recommended item introduction processing, and storing it;
(B) receiving and storing, from a client, an evaluation value indicating the degree of preference of the client for a specific item; (c) receiving a recommendation item introduction request from the client; (d) recommendation item Generating a recommended item list for the client that has transmitted the referral request based on the evaluation value of the item for the client and the access history map; and (e) transmitting the recommended item list to the client that has transmitted the recommended item referral request. Transmitting a recommended item.

Further, the present invention provides (a) an item provider server which provides an item to a plurality of clients via a network; Receiving and storing access history collection target client data indicating clients not to be collected, and (b) receiving the access history of the client from the item provider server and collecting the access history stored in step (a). Based on the target client data, only the access histories of the clients whose access histories are to be collected are extracted from the access histories received from the item provider server, and only the extracted access histories are extracted from the access histories suitable for recommended item introduction processing. And storing converted to flop,
(C) receiving a recommended item introduction request from a client; (d) generating a recommended item list based on an access history map for the client that transmitted the recommended item introduction request; and (e). Transmitting the recommended item list to the client that transmitted the recommended item introduction request.

The present invention also provides (a) a client from which an access history of browsing / purchasing items by a client is collected by an item provider server which provides the items to a plurality of clients via a network; Receives access history collection target data indicating clients that are not to be collected, sends an access history transmission request to clients whose access history is to be collected, and sends an access history transmission stop request to clients whose access history is not to be collected. Sending, (b) receiving an access history from a client whose access history is to be collected, converting the access history into an access history map suitable for recommended item introduction processing, and saving; (c) recommending from the client Aite The method comprising the steps of: receiving a referral request,
(D) generating a recommended item list based on an access history map for the client that has transmitted the recommended item introduction request; and (e) transmitting the recommended item list to the client that has transmitted the recommended item introduction request. Transmitting a recommended item.

According to the present invention, an access history of browsing / purchasing an item by a client is received from an item provider server which provides the item to a plurality of clients via a network, and an access history suitable for recommended item introduction processing is provided. Convert to map and save first
Means for receiving, from a client, an evaluation value indicating the degree of preference of the client for a specific item, storing the evaluation value, third means for receiving a recommendation item introduction request from the client, Fourth means for generating a recommended item list based on the evaluation value of the item and the access history map for the client which transmitted the item introduction request, and a client which transmitted the recommended item list to the client. And a fifth means for transmitting the recommended item to the recommended item introduction device.

According to the present invention, there is provided an item provider server which provides an item to a plurality of clients via a network, a client from which an access history of browsing / purchasing the item by the client is collected, and an access history from which the item is collected. First means for receiving and storing access history collection target client data indicating a client that does not become a client, and receiving access history collection target client data received by the client from an item provider server and stored by the first means Only the access history of the client whose access history is to be collected is extracted from the access history received from the item provider server, and only the extracted access history is converted into an access history map suitable for recommended item introduction processing based on the A second means for existing, a third means for receiving a recommended item introduction request from a client, and a fourth means for generating a recommended item list based on an access history map for the client which transmitted the recommended item introduction request. And a fifth means for transmitting the recommended item list to the client which has transmitted the recommended item introduction request.

According to the present invention, there is provided an item provider server for providing an item to a plurality of clients via a network, a client from which an access history of item browsing / purchasing by the client is to be collected, and an access history to be collected from the client. The first is to receive access history collection target client data indicating a client that does not become an access history, send an access history transmission request to the client that is to collect the access history, and send an access history transmission stop request to the client that is not the access history collection target. A second means for receiving an access history from a client whose access history is to be collected, converting the access history into an access history map suitable for recommended item introduction processing and storing the same, and a recommended item introduction request from the client. Receiving A third means for generating a recommended item list based on an access history map for the client which has transmitted the recommended item introduction request, a fourth means for generating the recommended item list, and And a fifth means for transmitting the information to the transmitting client.

According to the present invention, an access history of browsing / purchasing an item by a client is received from an item provider server which provides the item to a plurality of clients via a network, and an access history suitable for recommended item introduction processing is provided. Convert to map and save first
A second program code for receiving and storing, from a client, an evaluation value indicating the degree of preference of the client for a specific item, and a third program code for receiving a recommended item introduction request from the client And a fourth program code for generating a recommended item list based on the evaluation value of the item and the access history map for the client that has transmitted the recommended item introduction request, and the recommended item list, And a fifth program code to be transmitted to the client that has transmitted the recommended item introduction program.

According to the present invention, there is provided an item provider server for providing an item to a plurality of clients via a network. First program code for receiving and storing access history collection target client data indicating a client that does not become a client, and access history collection target client for receiving an access history of the client from the item provider server and storing the data by the first means Based on the data, only the access history of the client whose access history is to be collected is extracted from the access history received from the item provider server, and only the extracted access history is used as the access history map suitable for recommended item introduction processing. The second program code that converts and stores the recommended item, the third program code that receives the recommended item introduction request from the client, and the client that transmitted the recommended item introduction request are recommended based on the access history map for the client. A recommended item introduction program characterized by having a fourth program code for generating an item list, and a fifth program code for transmitting the recommended item list to a client that has transmitted a recommended item introduction request. A recording medium is provided.

According to the present invention, there is provided an item provider server for providing an item to a plurality of clients via a network. The first is to receive access history collection target client data indicating a client that does not become an access history, send an access history transmission request to the client that is to collect the access history, and send an access history transmission stop request to the client that is not the access history collection target. And a second program code for receiving an access history from a client whose access history is to be collected, converting the access history into an access history map suitable for recommended item introduction processing, and storing the same. A third program code for receiving an item introduction request, a fourth program code for generating a recommended item list based on an access history map for the client which transmitted the recommended item introduction request, and the recommended item. Fifth program code for sending the list to the client that sent the recommendation item introduction request;
And a recording medium on which a recommended item introduction program is recorded.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In one aspect of the present invention, a client that has transmitted a recommended item introduction request includes:
The client generates a list of recommended items based on an access history of browsing and purchasing items on the item provider server and an evaluation value indicating the degree of preference of each item of the client, and transmits the list to the client. I do.

That is, in this aspect of the present invention, the item provider and the item provider are managed based on a contract between the item provider and the company that operates the recommended item introduction device.
The recommended item introduction device from the server sends the item to the item provider server based on the access history of the client browsing / purchasing the item on the item provider server and the evaluation value of the item as the user preference estimation factor information from the client. Introduce the items listed.

It is to be noted that the item provider may own the recommended item introduction device.

By using the access history as "information to be analyzed", a large amount of "information to be analyzed" can be collected. Further, by using the evaluation value of the item input by the client as the “user preference estimation factor information”, the preference of the user can be explicitly indicated.

According to another aspect of the present invention, there is provided a client group which collects an access history of browsing / purchasing an item by accessing the item provider server which provides the item to a plurality of clients via a network. Identify in advance, receive and save access history from clients whose access history is to be collected,
When a recommended item introduction request is received from a client, a list of recommended items is generated based on the stored access history and transmitted to the request source.

Instead of using the access histories collected from all the client groups for which the recommended item introduction service is provided for generating the recommended item list, the access histories collected from a part of the client groups contracted in advance are used. In addition, by generating a recommended item list, the required network load and server processing capacity can be suppressed (compared to the case where access histories of all clients are handled) even with a huge number of clients such as 10 million clients or 100 million clients. Therefore, it is possible to provide services to an enormous number of clients, such as 10 million clients or 100 million clients, by using a server device that processes about 1 million clients.

Furthermore, the client's own access history (even if it is statistically processed) does not want to be used for introducing recommended items of other clients, but he / she wants to use a recommended item introducing service. Even a simple client can use the service.

Here, the terms used in this specification will be explained.

Items: advertisements, information, CD / book / movie titles and summaries, songs (music information), TV programs, etc. Users: Users who use an item provider server and a recommended item introduction device. This term refers to a client terminal used by a user depending on the method of assigning a client identifier.

Item provider: A company that operates a server that provides items to a plurality of users. EC site that introduces / sells items such as CDs / books, search / introduces / searches for items such as Web contents and information /
A company that operates an electronic mall site that integrates directory sites and multiple EC sites to introduce and sell items such as products. Also, a digital TV broadcasting station / content distribution company that broadcasts / distributes programs on a digital TV or the like, or a digital TV broadcasting station / content distribution company that provides / sells product information using a two-way communication function such as a digital TV. The server / apparatus operated by the company is referred to as an item provider server.

Client: A terminal such as a computer terminal, a digital TV, a set-top box, or an information home appliance that accesses an item provider server or a recommended item introduction device via a network.

Client identifier: The client identifier is an identifier capable of uniquely identifying a client on both the item provider server and the recommended item introduction device. It can be given by a member number manually input by the user, a time stamp recorded using the Cookie function of the browser, or the like.

Item identifier: An item identifier is an identifier that allows an item to be uniquely identified by both the item provider server and the recommended item introduction device. For example, when each page of a Web page is an item, a URL (Uniform Resource Locator) is an item identifier.

User preference estimation factor information: information used as a basis for estimating user preference. In the present invention, a list of interesting items input by the user, a list of evaluations of the interesting items input by the user, and the like. For example, the user specifies an item, selects from “I hate”, “I hate”, “None”, “I like”, and “I love”, and inputs an evaluation for the item. On the system side, a positive integer value of 1 to 5 or -2, -1,
An integer value such as 0, 1, 2, or the like is assigned.

Introduction of recommended items: A server that implements a service that provides an item estimates a user's preference by using the user's preference estimation factor information, and obtains a list of items that the user may be interested in. To introduce.

Item access history (access history): a history of browsing or purchasing an item. For example, it is composed of a client identifier, an item identifier, and a viewing / purchasing date and time.

Next, a recommended item introduction system according to the first embodiment of the present invention will be described with reference to FIGS.

FIG. 1 shows a configuration example of a recommended item introduction system according to the first embodiment of the present invention.

The recommended item introduction system of this embodiment comprises a recommended item introduction device 1, an item provider server 2, a client 3, and a network (Internet) 4.

The recommended item introduction device 1 includes an access history processing unit 11, an access history map management unit 12, a user input / output processing unit 13, a recommended item introduction processing unit 14, and an item evaluation storage unit 15.

The access history processing unit 11 receives the access history from the item provider server 2, converts the access history into an access history map suitable for the recommended item introduction process, and stores the access history map together with the access history map storage request. It is transmitted to the management unit 12.

The access history map management unit 12 stores and manages the access history map received from the access history processing unit 11 as access history map data 16.

The user input / output processing unit 13 transmits “the client identifier, the item identifier, and the evaluation value of the item” to the item evaluation storage unit 15 together with the item evaluation record request transmitted from the client 3, and also transmits from the client 3. The recommended item introduction request sent to the recommendation introduction processing unit 14 together with the client identifier,
The recommended item introduction response received from the recommended item introduction processing unit 14 is sent to the client of the client identifier that has received the recommended item introduction request, together with the recommended item list, and then the item provider server 2 is charged. .

The item evaluation storage unit 15 receives the client identifier, the item identifier, and the evaluation value of the item transmitted from the user input / output processing unit 13 together with the item evaluation record request, and receives the received client identifier and the evaluation value of the item identifier. Is recorded in the item evaluation data 17.

The recommended item introduction processing unit 14 receives a client identifier together with a recommended item introduction request from the user input / output processing unit 13, extracts a high evaluation item group related to the client identifier from the item evaluation storage unit 15, and extracts the extracted high evaluation items. For each item identifier included in the item group, a list of client identifiers (related client group) stored in the access history map management unit 12 is extracted, and the extracted related client group is narrowed down. The list of item identifiers (related item group) stored in the history map management unit 12 is extracted, the items included in the related item group are narrowed down, and the narrowed down item group is used as a recommended item list as a client identifier of a recommended item introduction request source. And Send a recommended item introduction response that contains the user to input and output processing unit 13.

Next, the operation of this embodiment will be described.

1. Creation of access history map (Fig. 2) (1) Client 3 is item provider server 2
To browse / purchase items (step 21): Client 3 accesses item provider server 2,
When browsing the posted information, purchasing a product, or the like, the information is stored in the item provider server 2 as an access history.

(2) Transmission of access history from the item provider server 2 to the recommended item introducing device 1 (step 22): The item provider server 2 periodically stores the stored access history in the recommended item introducing device 1.
Send to Here, the access history includes, for example, a list of a client identifier, an item identifier, and an access date and time.

(3) Creation of an access history map in the recommended item introduction device 1 (step 23): The access history processing section 11 of the recommended item introduction device 1 receives the access history transmitted from the item provider server 2. , Is converted to an access history map suitable for recommended item introduction processing. The access history map is, for example, a list of item identifiers and distances for each client identifier (FIG. 3) or a list of client identifiers and distances for each item identifier (FIG. 4). Here, "distance"
Information that can be read from the access history, such as the number of accesses to the item and the time from the date and time when the item was most recently accessed, is calculated, and a finite number (for example,
~ 100). In the distance based on the number of accesses, for example, an arithmetic expression is set such that the greater the number of accesses, the shorter the distance.

(4) Transmission of access history map storage request from access history processing section 11 to access history map management section 12 (step 24): access history processing section 11
Sends the access history map to the access history map management unit 12 together with the access history map storage request in order to record the access history map generated in (3).

(5) Storage of Access History Map in Access History Map Management Unit 12 (Step 25): The access history map management unit 12 receives the access history map, and stores and manages it in the access history map data 16.

2. Record of item evaluation (FIGS. 5 and 6) (1) Transmission of item evaluation record request from client 3 to recommended item introduction device 1 (step 31): Client 3 evaluates specific item (user preference estimation factor) Information), that is, “client identifier, item identifier, and evaluation value of the item” are transmitted to the recommended item introduction device 1 together with the item evaluation record request. Here, the evaluation value of the item is, for example, “dislike”, “dislike”, “neither”, “like” selected by the user.
A positive integer value of 1 to 5 is assigned to the item “I love”.

(2) Transmission of an item evaluation recording request from the user input / output processing unit 13 to the item evaluation storage unit 15 (step 32): The user input / output processing unit 13 receives the item evaluation recording request and receives the item evaluation recording request. And the "client identifier, item identifier, and evaluation value of the item" together with the item evaluation record request.

(3) Recording of the item evaluation value in the item evaluation storage section 15 (step 33): The item evaluation storage section 15 receives the item evaluation record request and, based on the received client identifier, stores the relevant item evaluation data. The received client identifier and the evaluation value relating to the item identifier are recorded in the item of the client identifier (FIG. 6). If the evaluation value for the item identifier has already been recorded, the evaluation value is rewritten according to a policy such as overwriting, latest priority, high value priority, low value priority or the like in advance.

3. Recommended item introduction request (FIG. 7) (1) Transmission of recommended item introduction request from client 3 to recommended item introduction device 1 (step 41): Client 3 specifies the client identifier together with the recommended item introduction request and recommended item introduction device 1 (user) It is transmitted to the input / output processing unit 13).

(2) Transmission of a recommended item introduction request from the user input / output processing unit 13 to the recommended item introduction processing unit 14 (step 42): The user input / output processing unit 13 receives the recommended item introduction request, and receives the recommended item introduction request. At the same time, the client identifier is transmitted to the recommended item introduction processing unit 14.

4. Generation of recommended item list (Fig. 8,
(FIG. 9) (1) Extraction of a requesting client's highly evaluated item group by the recommended item introduction processing unit 14 (step 51): The recommended item introduction processing unit 14 receives the recommended item introduction request, and based on the received client identifier. From the item evaluation storage unit 15, a high evaluation item group related to the client identifier is extracted. The high evaluation item group is, for example, the top N1 items (N1 is an integer of 1 or more) from the larger evaluation value in the item group and evaluation value list for each client identifier stored in the item evaluation data 17. List of identifiers or evaluation value is N2
(N2 is an integer) or more.

(2) Extraction of the related client group by the recommended item introduction processing unit 14 (step 52): The recommended item introduction processing unit 14 checks each of the item identifiers included in the high evaluation item group extracted in (1). Next, a list of client identifiers (related client group) stored in the access history map management unit 12 is extracted.

(3) Narrowing down related client groups in recommended item introduction processing section 14 (step 53): The recommended item introduction processing section 14 narrows down the related client groups extracted in (2). As an example for narrowing down, the related client groups are rearranged in descending order of the number of accesses to the extracted high-rated item groups, and the top N3 items (N3 is an integer of 1 or more) are set as a new related client group. .

(4) Extraction of Related Item Group in Recommended Item Introduction Processing Unit 14 (Step 54): The recommended item introduction processing unit 14 performs the following for each client identifier included in the related client group narrowed down in (3). The list of item identifiers (related item group) stored in the access history map management unit 12 is extracted.

(5) Refinement of Related Item Group in Recommended Item Introduction Processing Unit 14 (Step 55): The recommended item introduction processing unit 14 narrows down the related item group extracted in (4). As an example for narrowing down, the related item groups are rearranged in descending order of the number of accesses from the related client group narrowed down in (3), and the top N4 items (N4 is an integer of 1 or more) are set as new related item groups. (Recommended item list).

5. Recommended item introduction response (FIG. 10) (1) Transmission of recommended item introduction response from recommended item introduction processing unit 14 to user input / output processing unit 13 (step 61): recommended item introduction processing unit 14 transmits the recommended item introduction response. 3. the client identifier of the recommendation request source and It is sent to the user input / output processing unit 13 together with a list of recommended items as a result of the narrowing down in (5).

(2) Transmission of a recommended item introduction response from the recommended item introduction device 1 to the client 3 (step 62): The user input / output processing unit 13 of the recommended item introduction device 1 receives the recommended item introduction response Along with the list of items, the information is sent to the client 3 that is the recommendation introduction request source based on the received client identifier.

(3) Request of a fee from the recommended item introduction device 1 to the item provider server 2 (step 6)
3): When the recommended item introduction response process of (2) is completed, the user input / output processing unit 13 of the recommended item introduction device 1 charges a fee based on a prior contract with the item provider server 2. The fee is a monthly flat fee in one example, a metered fee for each number of referrals in one example, and a metered fee for each number of introduced items in one example.

FIG. 11 shows a configuration example of a computer system in which the recommended item introducing device 1 in FIG. 1 is mounted. The communication equipment value 71 is for communicating with the client 3 and the item provider server 2. The access history map data 16 is stored in the storage device 72. The storage device 73 stores the item evaluation data 17. The storage device 74 is a hard disk. The recording medium 75 is a floppy disk, CD-ROM, magneto-optical disk, etc.
The access history processing unit 11, the access history map management unit 12, the user input / output processing unit 13, the recommended item introduction processing unit 14, and the item evaluation storage unit 15 shown in FIG. 2, FIG. 5, FIG. 7, FIG. A recommended item introduction program consisting of processing is recorded. The data processing device 76 is C
It includes a PU and an interface, reads a recommended item introduction program from the recording medium 75, and executes it.

Next, a recommended item introduction system according to a second embodiment of the present invention will be described with reference to FIGS.

FIG. 12 shows a configuration example of a recommended item introduction system according to the second embodiment of the present invention.

The recommended item introduction system according to the present embodiment includes a recommended item introduction device 101, an item provider server 102, a client 103, and client groups 104 and 105.

The recommended item introduction device 101 includes an access history collection management unit 111 and an access history map management unit 11
2, a history reception number management unit 113, a recommended item introduction processing unit 114, and a recommended item distribution processing unit 115.

The access history collection management unit 111 lists the client identifiers of the clients whose access histories are to be collected along with the access history collection client registration request from the item provider server 102, and the client identifiers of the clients whose access histories are not to be collected. The list is received, an access history transmission request is sent to a client whose access history is to be collected, and an access history transmission stop request is sent to a client whose access history is not to be collected. Further, the access history is received from the client, converted into an access history map suitable for the recommended item introduction request processing, transmitted to the access history map management unit 112 together with the access history map storage request, and a history reception record request is transmitted to the access history. Along with the client identifier of the received client, it is sent to the history reception number management unit 113.

The access history map management unit 112 stores and manages the access history map received from the access history collection management unit 111 in the access history map data 116.

The history reception count management unit 113 increments the access history reception count of the client identifier received from the access history collection management unit 111, periodically counts the access history reception count for each client identifier, and provides the item provider server Send to 102.

The recommended item introduction processing unit 114 receives, from the client, a client identifier and a list of identifiers of the items accessed by the client together with the recommended item introduction request, and obtains an access history map managed by the access history map management unit 112. Data 11
6, a recommended item list for the client indicated by the received client identifier is generated and transmitted to the client.

The recommended item distribution processing unit 115 receives a list of item identifiers of items to be distributed together with the item distribution request from the item provider server 102, and stores the list of item identifiers in the distribution item data 1
Record at 17.

Next, the operation of the present embodiment will be described.

1. Access history transmission request (FIG. 13) (1) An access history collection client registration request is transmitted from the item provider server 102 to the recommended item introduction device 101 (step 121): The item provider server 102 makes a contract with the client in advance ( (Or consent), identify clients that are allowed to collect access history, list client identifiers of clients whose access history is to be collected along with access history collection client registration requests, and clients that are not eligible for access history collection. Is sent to the recommended item introduction device 101.

(2) An access history transmission request is transmitted from the recommended item introduction device 101 to the client group 104 (step 122): The access history collection management unit 111 of the recommended item introduction device 101 transmits the access history received in (1). An access history transmission request is sent to each client listed in the client identifier list of the client to be collected to request transmission of an access history. Hereinafter, the client group that has transmitted the access history transmission request is referred to as a client group 104.

(3) Registration of access history transmission in the client group 104 (step 123): Each client of the client group 104 that has received the access history transmission request in (2) recommends an access history to the item provider server 102. Registration for sending to the item introduction device 101 is performed.

(4) The recommended item introducing device 101 transmits an access history transmission stop request from the recommended item introducing device 101 to the client group 105 (step 124): The recommended item introducing device 101 (the access history collection management unit 11) that has completed the processing of (2)
1) sends an access history transmission stop request to each client listed in the list of client identifiers of the clients whose access history is not to be collected and received in (1), to request the stop of the transmission of the access history.
Hereinafter, the client group that has transmitted the access history transmission stop request is referred to as the client group 105.

The access history transmission stop request does not necessarily need to be sent to the client for which all access histories are not to be collected. For example, each client
In the initial state, if the registration is made such that the access history is not transmitted, the recommended item introduction device 101
From the list of client identifiers of the client group 104 stored in the (access history collection management unit 111), it is also possible to send an access history transmission stop request to only those which must request transmission stop.

(5) Access History Transmission Stop Processing in Client Group 105 (Step 125): Each client of the client group 105 that has received the access history transmission stop request in (4) stops transmission so as not to send the access history to the item provider server 102 to the recommended item introduction device 101 (access history collection management unit 111). Register.

2. Collection of access history (Fig. 14) (1) From client to item provider server 1
Access to 02 (step 131): Each client belonging to the client group 104 and the client group 105 accesses each item of the item provider server 102. Access to each item is an act of browsing / purchasing information, merchandise, music, video, programs, and the like provided by the item provider server 102.

(2) Transmission of access history from client group 104 to recommended item introduction device 101 (step 132): Each client belonging to the client group 104 that has accessed the item provider server 102 in (1) transmits the access history to the recommended item introduction device 101. The access history is, for example, a client identifier,
It consists of an item identifier, access date and time, and the like.

(3) Generation of Access History Map in Recommended Item Introduction Device 101 (Step 133): Access History Collection Management Unit 11 of Recommended Item Introduction Device 101
1 converts the access history received in (2) into an access history map format suitable for recommended item introduction processing.
The access history map is, for example, a list of item identifiers and distances for each client identifier (FIG. 3) or a list of client identifiers and distances for each item identification (FIG. 4). Here, the distance refers to a finite integer value (for example, 1 to 100) obtained by calculating information that can be read from the access history, such as the number of accesses to the item or the time since the date and time when the item was most recently accessed. Is replaced by For example, in a distance based on the number of accesses, an arithmetic expression is set such that the greater the number of accesses, the shorter the distance.

(4) Transmission of an access history map storage request from the access history collection management unit 111 to the access history map management unit 112 (step 134): The access history collection management unit 111 generates the access history map generated in (3). Is stored in the access history map management unit 11 together with the access history map storage request.
Send to 2.

(5) Storage of access history map in access history map management section 112 (step 135): The access history map management section 112 stores the access history map received in (4) in the access history map data 116,
to manage.

(6) Transmission of a history reception record request from the access history collection management unit 111 to the history reception count management unit 113 (step 136): The access history collection management unit 111 that transmitted the access history map storage request in (4) Sends the history reception record request to the history reception count management unit 113 together with the client identifier of the client that has received the access history.

(5) Recording of the number of history receptions by the history reception number management unit 113 (step 137): The history reception number management unit 113 increments the access history reception number of the received client identifier, and stores the history reception number data 11
Save to 7.

3. Introduction of recommended items (Fig. 15, Fig. 1
6) (1) Client recommended item introduction device 101
Send request to introduce recommended items to
1): Client (all clients included in client group 104 or client group 105)
Sends a list of client identifiers and the item identifiers of the items accessed by the client together with the recommended item introduction request. In order to receive a more desired introduction, intentional extraction operations such as extracting only recently accessed items from the list of item identifiers or extracting only item identifiers of a genre of interest at that time were added. Things may be a list of item identifiers.

(2) Generation of a recommended item list in the recommended item introduction device 101 (recommended item introduction processing unit 114) (step 142): The recommended item introduction processing unit 114 of the recommended item introduction device 101 that has received the recommended item introduction request Is the access history map management unit 1
Access map data 116 managed by
, A list of recommended items for the client identified by the received client identifier is generated.

FIG. 15 shows a method for generating a list of recommended items.

<1> Extraction processing of related client group from access history map management section 112 by recommended item introduction processing section 114; recommended item introduction processing section 114
Accesses the access history map data 116 of the access history map management unit 112, and, for each item identifier included in the list of item identifiers received in (1), a list of client identifiers of the client accessing the item. (Related Client Group) is extracted.

<2> Refinement processing of related client group by recommended item introduction processing section 114; Recommended item introduction processing section 114 performs narrowing processing of the related client group extracted in <1>. As an example for narrowing down, the related client group is rearranged in descending order of the number of accesses to the list of item identifiers received in (1), and the top N5 cases (N5 is an integer of 1 or more) are set as new related clients. Group.

<3> Related Item Group Extraction Processing by Recommended Item Introduction Processing Unit 114; Recommended item introduction processing unit 114 accesses access history map data 116 of access history map management unit 112, and narrows down by <2>. For each client identifier included in the related client group, a list (related item group) of item identifiers of items accessed by the client is extracted.

<4> Refinement processing of related item group in recommended item introduction processing unit 114; Recommended item introduction processing unit 114 performs narrowing processing of the related item group extracted in <3>. As an example for narrowing down, <
The related item groups are sorted in descending order of the number of accesses from the related client groups narrowed down in 2>, and the top N6
The case (N6 is an integer of 1 or more) is set as a new related item group. The related item group narrowed down by this processing is called a recommended item list.

(3) Transmission of the recommended item introduction response from the recommended item introduction device 101 to the client (step 143): The recommended item introduction processing unit 114 of the recommended item introduction device 101 also transmits the client identifier received in (1). At the same time, a list of recommended items narrowed down in <4> is transmitted to the requesting client together with the item introduction response.

4. Delivery of Recommended Items (FIG. 17) An example of delivering a delivery item to a client who is likely to be interested in the delivery item using information such as an advertisement of a product to be promoted as a delivery item will be described.

(1) Item provider server 102
(Step 151): The item provider server 102 transmits the item identifier of the item to be distributed together with the item distribution request to the recommended item introduction device 101 (recommended item distribution processing unit 115). Submit the list.

(2) Recording of the item identifier of the distribution item in the recommended item introduction device 101 (step 15)
2): Recommended item distribution processing unit 115 of the recommended item introduction device 101 that has received the item distribution request in (1).
Records the received list of item identifiers in the distribution item data 118.

3. When there is a record of this distribution item
The process (2) is a process of narrowing down the related client group by the recommended item introduction processing unit 114.

The recommended item introduction processing unit 114 sets <1
The narrowing-down process of the related client group extracted in> is performed. At this time, as an example of narrowing down, 3. The related client group is rearranged in descending order of the number of accesses to the list of item identifiers received in (1), and the item identifiers recorded as distribution items in the distribution item data of the recommended item distribution processing unit 115 are ranked higher. Rearranged, and the top N7 cases (N7 is an integer of 1 or more) are set as a new related client group.

According to this processing, it is possible to increase the purchase rate for a specific product.

5. Payment of History Provision Fee (FIG. 18) It is likely that some margin will be paid for the provision of the access history from the client group 104. The history receiving number management unit 113 contributes to the payment of the history providing fee.

(1) Transmission of the number of history receptions from the recommended item introduction device 101 (history reception number management unit 113) to the item provider server 102 (step 16)
1): The history reception count management unit 113 periodically counts the history reception count for each client identifier of the client group 104 that has transmitted the access history to the recommended item introduction device 101 during the observation period, and the item provider server 102 Send to

(2) Item provider server 102
Pays the history provision fee from the client to the client group 104 (step 162): the item provider server 10
2 is 5. Based on the number of history receptions for each client identifier received in (1), a history provision fee is paid to the client that provided the access history.

As the history providing fee, a fixed fee according to a contract between the item provider server 102 and each client belonging to the client group 104 or a pay-as-you-go fee for each number of history provided is paid to each client.

The payment of the history provision fee is carried out by reducing the usage fee of the item provider server 102, exempting or reducing the rental / lease fee of the communication device or the client terminal, issuing a discount when purchasing a product, or issuing a coupon. It may be done.

FIG. 19 shows a configuration example of a computer system in which the recommended item introduction device 101 in FIG. 12 is mounted. The communication equipment value 171 includes the client groups 104 and 105,
It is for communicating with the item provider server 102. The storage device 172 stores access history map data 116, history reception count data 117, and distribution item data 118. The storage device 173 is a hard disk. The recording medium 174 is a floppy disk,
CD-ROM, magneto-optical disk, etc.
15, 17 and 18, the access history collection management unit 111, the access history map management unit 112, the history reception number management unit 113, the recommended item introduction processing unit 114,
A recommended item introduction program consisting of processing of the recommended item distribution processing unit 115 is recorded. The data processing device 175 includes a CPU and an interface, reads a recommended item introduction program from the recording medium 174, and executes the program.

Next, a recommended item introduction system according to a third embodiment of the present invention will be described with reference to FIGS. The third embodiment is different from the first and second embodiments described above.
Are combined with each other.

FIG. 20 shows a configuration example of a recommended item introduction device 201 according to the third embodiment of the present invention. The difference between the recommended item introduction device 201 and the recommended item introduction device 1 in FIG. 1 is that an access history collection target recording unit 18 for newly storing access history collection target client data 19 is provided. . Other components are the same as those in FIG. 1 and are denoted by the same reference numerals in the figure.

Next, the operation of the recommended item introduction device 201 of this embodiment will be described.

In this case, before making an access history transmission request, the access history collection target recording unit 18 stores a list of clients whose access history is to be collected from the item provider server 2 and a client whose access history is not to be collected. Is received and stored as access history collection client data 19.

FIG. 21 shows an operation of generating an access history map corresponding to FIG. 2 in the first embodiment. In the operation of FIG. 21, after receiving the access history of item browsing / purchasing by the client from the item provider server 2 in step 22, the access history is stored in the access history collection target recording unit 18 in step 26.
Then, only the access histories of the clients whose access histories are to be collected are compared with the list of clients whose access histories are to be collected. The rest of the operation of FIG. 21 is the same as that of FIG.

In this case, the item evaluation is recorded in the same manner as in the first embodiment.

The recommended item introduction request is made as follows.

(1) Reception of a recommended item introduction request from the client 3 to the recommended item introduction device 201: A list of a client identifier and / or an item identifier of an item accessed by the client 3 itself is received together with the recommended item introduction request from the client 3. I do. In order to receive a more desired introduction, intentional extraction operations such as extracting only recently accessed items from the list of item identifiers or extracting only item identifiers of a genre of interest at that time were added. Things may be a list of item identifiers.

(2) Transmission of a recommended item introduction request from the user input / output processing unit 13 to the recommended item introduction processing unit 14: The user input / output processing unit 13 processes the received list of client identifiers and / or item identifiers into recommended item introduction processing. Transmit to the unit 14.

The recommended item list is generated by creating a highly evaluated item group as in the first embodiment. In this case, the received item identifier is added to the highly evaluated item group.

Other operations of the recommended item introduction device 201 are the same as those of the first embodiment.

Next, a recommended item introduction system according to a fourth embodiment of the present invention will be described with reference to FIGS. The fourth embodiment is also similar to the first and second embodiments described above.
Are combined with each other.

FIG. 22 shows a configuration example of a recommended item introduction device 301 according to the fourth embodiment of the present invention. The difference between the recommended item introduction device 301 and the recommended item introduction device 201 in FIG. 20 is that an unextracted client access history storage unit 28 for newly storing unextracted client access history data 29 is provided. is there. The other components are the same as those in FIG. 20 and are denoted by the same reference numerals in the figure.

Next, the operation of the recommended item introduction device 301 of the present embodiment will be described.

In this case, before making an access history transmission request, the access history collection target recording unit 18 stores a list of clients whose access history is to be collected from the item provider server 2 and a client whose access history is not to be collected. Is received and stored as access history collection client data 19.

FIG. 23 shows an operation of generating an access history map corresponding to FIG. 2 in the first embodiment. In the operation of FIG. 23, after receiving the access history of the item browsing / purchasing by the client from the item provider server 2 in step 22, the access history is stored in the access history collection target recording unit 18 in step 27.
The access history collection target client data 18 from which the access history is to be collected is extracted, and only the access history is extracted and converted into an access history map and stored. The access history storage unit 28 stores the data as unextracted client access history data. FIG.
The rest of the operation is the same as that of FIG.

In this case, the item evaluation is recorded in the same manner as in the first embodiment.

The generation of the recommended item list is basically performed in the same manner as in the first embodiment. In this case, if the access history of the received client identifier is stored in the unextracted client access history storage unit 28, The item identifier is added to the high evaluation item group.

Other operations of the recommended item introduction device 301 are the same as those of the first embodiment.

The following can be applied / changed in each embodiment of the present invention described above.

The network is not limited to the Internet. There are a digital interactive TV, an information home appliance network, and the like.

Clients include PCs, mobile phones, digital two-way TVs, information home appliances, communicable word processors, communicable game machines, communicable watches, PDAs (Person
al Digital Assistants).

Input / output is not limited to Web pages. Sending access history, item evaluation record request, recommended item introduction request, client identifier, etc. as e-mail document or title using e-mail, and using e-mail address instead of client identifier Can also. The recommended item list can also be sent as an e-mail document.

The client identifier can be managed in association with a customer identifier different from the client identifier. The customer identifier includes a unique identifier arbitrarily input on the client side, an ID assigned by the recommended item introduction device separately from the client identifier, and the like.

The introduction of the recommended item list can be displayed, for example, over the television screen and over the game display.

[0130]

As described above, according to the present invention,
By using the access history of the client browsing / purchasing items on the item provider server as "information to be analyzed", the input load on the client side is reduced, and a large amount of "information to be analyzed" Can be collected, and the user's preference can be explicitly shown by using an evaluation input for each item or a list of favorite items as "user preference estimation factor information" indicating the user's preference. Yes, and can be changed at any time.

Further, according to the present invention, a recommended item introduction service is provided to all clients based on access histories collected from a part of clients subscribed in advance, so that the required network load and server It is possible to provide services to a huge number of clients with reduced processing power.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a recommended item introduction system according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a flow of processing when creating an access history map in FIG. 1;

FIG. 3 is a list of item identifiers and distances for each client identifier in FIG. 1;

FIG. 4 is a list of client identifiers and distances for each item identifier in FIG. 1;

5 is a diagram showing a flow of processing at the time of item evaluation recording in FIG.

FIG. 6 is a diagram showing an example of item evaluation record data in FIG.

FIG. 7 is a diagram showing a flow of processing when a recommended item introduction request is made in FIG. 1;

FIG. 8 is a diagram showing a flow of processing when generating a recommended item list in FIG. 1;

FIG. 9 is an explanatory diagram of a recommended item list generation process in FIG. 1;

FIG. 10 is a diagram showing a flow of a process when a recommended item introduction response is made in FIG. 1;

11 is a configuration diagram of an example of a computer system for mounting the recommended item introduction device of FIG. 1;

FIG. 12 is a configuration diagram of a recommended item introduction system according to a second embodiment of the present invention.

FIG. 13 is a diagram showing processing at the time of an access history transmission request in FIG.

FIG. 14 is a diagram showing processing at the time of access history collection in FIG. 12;

FIG. 15 is a diagram showing processing at the time of introducing recommended items in FIG. 12;

FIG. 16 is an explanatory diagram of a recommended item list creation process in FIG. 12;

FIG. 17 is a diagram illustrating a process at the time of recommendation item distribution in FIG. 12;

FIG. 18 is a diagram showing processing at the time of paying a history provision fee in FIG.

FIG. 19 is a configuration diagram of another example of a computer system for mounting the recommended item introduction device of FIG. 1;

FIG. 20 is a configuration diagram of a recommended item introduction device according to a third embodiment of the present invention.

21 is a diagram showing the flow of processing when creating an access history map in FIG. 20.

FIG. 22 is a configuration diagram of a recommended item introduction device according to a fourth embodiment of the present invention.

FIG. 23 is a diagram showing a flow of processing when creating an access history map in FIG. 22;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Recommended item introduction device 2 Item provider server 3 Client 4 Network 11 Access history processing unit 12 Access history map management unit 13 User input / output processing unit 14 Recommended introduction processing unit 15 Item evaluation storage unit 16 Access history map data 17 Item evaluation data 18 Access history collection target recording unit 19 Access history collection target client data 28 Unextracted client access history storage unit 29 Unextracted client access history data 71 Communication unit 72, 73, 74 Storage device 75 Recording medium 76 Data processing device 101 Recommended item introduction Device 102 Item provider server 103 Network 104, 105 Client group 111 Access history collection management unit 112 Access history map management unit 113 Reception count management unit 114 Recommended item introduction processing unit 115 Recommended item distribution processing unit 116 Access history map data 117 History reception count data 118 Distribution item data 171 Communication device 172, 173 Storage device 174 Recording medium 175 Data processing device 201 Recommended item introduction device 301 Recommended item introduction device

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G06F 17/30 170 G06F 17/30 170Z 340 340A

Claims (42)

[Claims] (A) An access history map suitable for recommended item introduction processing by receiving an access history of browsing / purchasing an item by a client from an item provider server that provides the item to a plurality of clients via a network. (B) receiving, from a client, an evaluation value indicating the degree of preference of the client for a particular item, and storing; (c) receiving a recommended item introduction request from the client (D) generating a recommended item list based on the evaluation value of the item for the client and the access history map for the client that transmitted the recommended item introduction request; and (e) storing the recommended item list in the client. Recommended item introduction request Recommended item introduction method characterized by comprising the steps of: transmitting to the client that signal. 2. In the step (a), each access history map is obtained as a list of an item identifier and a distance for each client identifier or a list of a client identifier and a distance for each item identifier.
2. The recommended item introducing method according to claim 1, wherein information that can be read is calculated from an access history including information on the number of times of access to the item or the date and time when the item was most recently accessed. 3. The step (d) comprises: (d1) a list of a predetermined number of upper item identifiers in a list of item identifiers and evaluation values for each client identifier, or an item identifier of an item whose evaluation value is equal to or more than a predetermined value. Extracting a group of highly evaluated items related to the client provided by the list; and (d2) storing in the access history map for each item identifier included in the group of highly evaluated items extracted in the step (d1). (D3) narrowing down the related client group extracted in the step (d2); and (d4) narrowing down the related client group extracted in the step (d2). For each client identifier included in the client group, Extracting a related item group given by a list of item identifiers stored in the access history map; and (d5) narrowing down the related item group extracted in the step (d4) to obtain the recommended item list. 3. The recommended item introducing method according to claim 2, wherein the recommended item is included. 4. The step (d3) sorts the related client groups in descending order of the number of accesses to the high evaluation item group extracted in the step (d1), The related client group is narrowed down by setting a predetermined number of related clients as a new related client group. In the step (d5), the number of accesses from the new related client group obtained in the step (d3) is large. 4. The recommended item introducing method according to claim 3, wherein the related item groups are rearranged in order, and the related item group is narrowed down by setting a predetermined number of upper items of the rearranged related item groups as the recommended item list. 5. A client from which an access history of browsing / purchasing an item by a client is to be collected by an item provider server which provides the item to a plurality of clients via a network; (B) receiving the access history collection target client data indicating the client to be disabled, and storing the access history collection client data from the item provider server, and storing the access history collection target client data stored in the step (a). Only the access history of the client whose access history is to be collected is extracted from the access history received from the item provider server, and only the extracted access history is converted into an access history map suitable for recommended item introduction processing. (C) receiving a recommended item introduction request from a client; and (d) generating a recommended item list for the client that transmitted the recommended item introduction request based on an access history map for the client. (E) transmitting the recommended item list to the client that transmitted the recommended item introduction request. 6. In the step (c), a list of a client identifier of the client and an item identifier of an item accessed by the client itself are received together with the recommended item introduction request, and the step (d) is performed in the step (c). 6. The recommended item introduction method according to claim 5, wherein a recommended item list is generated based on the list of item identifiers received in the step (a). 7. An access history of a client whose access history is not to be collected based on the access history collection target client data stored in the step (a). The method further includes a step of separately storing the recommended item list based on an access history map obtained from the client when the client is a collection target of the access history. 6. The recommended item introduction method according to claim 5, wherein, if not the collection target, a recommended item list is generated based on the access history for the client stored in the step (f). 8. The method further comprises: (g) receiving and storing, from a client, an evaluation value indicating a degree of preference of the client for a specific item, wherein the step (d) is performed in the step (g). 6. The recommended item introduction method according to claim 5, wherein the recommended item list is generated based on the stored evaluation value of the item for the client. 9. In the step (a), each access history map is obtained as a list of an item identifier and a distance for each client identifier or a list of a client identifier and a distance for each item identifier.
6. The recommended item introduction method according to claim 5, wherein information readable from an access history including information on the number of times of access to the item or the date and time when the item was most recently accessed is calculated. 10. The step (d) includes: (d1) a list of a predetermined number of upper item identifiers in a list of item identifiers and evaluation values for each client identifier, or an item identifier of an item whose evaluation value is equal to or more than a predetermined value. Extracting a group of highly evaluated items related to the client provided by the list; and (d2) storing in the access history map for each item identifier included in the group of highly evaluated items extracted in the step (d1). (D3) narrowing down the related client group extracted in the step (d2); and (d4) narrowing down the related client group extracted in the step (d2). For each client identifier included in the client group, Extracting a related item group given by a list of item identifiers stored in the access history map; and (d5) narrowing down the related item group extracted in the step (d4) to obtain the recommended item list. 10. The recommended item introducing method according to claim 9, wherein the recommended item is included. 11. The step (d3) sorts the related client groups in descending order of the number of accesses to the high evaluation item group extracted in the step (d1), The related client group is narrowed down by setting a predetermined number of related clients as a new related client group, and the step (d5) includes:
The related item groups are rearranged in the descending order of the number of accesses from the new related client group obtained in the step (d3), and a predetermined number of items in the rearranged related item group are set as the recommended item list. 11. The recommended item introducing method according to claim 10, wherein the related item group is narrowed down by this. 12. An item provider for providing an item to a plurality of clients via a network.
Receives access history collection target client data indicating the client from which the access history of item browsing / purchasing by the client is collected and the client from which the access history is not collected from the server. Sending an access history transmission request and sending an access history transmission stop request to a client whose access history is not to be collected; and (b) receiving an access history from the client whose access history is to be collected and recommending the access history. (C) receiving a recommendation item introduction request from a client; and (d) transmitting the recommendation item introduction request from the client to the client. Generating a recommended item list based on the access history map to be performed; and (e) transmitting the recommended item list to the client that transmitted the recommended item introduction request. Method. 13. The recommended item introduction method according to claim 12, further comprising the step of: (f) receiving and recording a list of item identifiers of items to be distributed together with an item distribution request from the item provider server. (G) incrementing the number of history receptions of each client when an access history is received from each client; and (h) periodically counting the number of history receptions of each client, and receiving the totaled history. The number of times the item provider
13. The recommended item introducing method according to claim 12, further comprising a step of transmitting the recommended item to a server. 15. The method according to claim 15, wherein the item provider server pays a history provision fee to each client that has provided an access history based on the total number of history receptions of each client transmitted in the step (h). 15. The recommended item introducing method according to claim 14, wherein the recommended item introducing method is provided. 16. In the step (b), each access history map is obtained as a list of item identifiers and distances for each client identifier or a list of client identifiers and distances for each item identifier. 13. The recommended item introduction method according to claim 12, wherein information readable from an access history including information on the number of times of access to the item or the date and time when the item was most recently accessed is calculated. 17. The step (c) receives a recommended item introduction request and a list of a client identifier of the client and an item identifier of an item accessed by the client itself, and the step (d) includes the step (c). 13. The recommended item introducing method according to claim 12, wherein the recommended item list is generated based on the list of item identifiers received in the step (c). 18. The step (d) includes: (d1) an item of each item identifier included in the list of item identifiers received in the step (c) based on the access history map stored in the step (b). (D2) narrowing down the related client group extracted in the step (d1), which is provided by a list of client identifiers of clients accessing the (d2). Based on the access history map saved in b), the related item group given by the item identifier list of the item being accessed by the client of each client identifier included in the related client group narrowed down in step (d2) Extracting (d4) Refine the serial-related item group extracted in step (d3), recommended item introduction method according to claim 17, comprising the step of obtaining the recommended item list. 19. The step (d2) rearranges and sorts the related client groups in descending order of the number of accessing items of each item identifier included in the item identifier list received in the step (c). The related client group is narrowed down by setting a predetermined number of related clients higher than the related client group as a new related client group, and the step (d4) is performed from the new related client group obtained in the step (d2). 19. The related item group is rearranged in the descending order of the number of accessed items, and the related item group is narrowed down by setting a predetermined number of items, which are higher than the rearranged related item group, as the recommended item list. Recommended item introduction method described. 20. In the step (d2), the related client groups are rearranged in descending order of the number of accessing items of each item identifier included in the list of the item identifiers received in the step (c). The related client group is narrowed down by setting a predetermined number of related clients higher than the related client group as a new related client group, and the step (d4) is performed from the new related client group obtained in the step (d2). The items included in the recommended item list are sorted in descending order of the number of accessed items, and the related items are narrowed down by setting a predetermined number of items above the sorted item group as a new recommended item list. 19. The recommended item introducing method according to claim 18, wherein the recommended item is introduced. 21. An item provider server that provides an item to a plurality of clients via a network, receives an access history of browsing / purchasing the item by the client, and converts it into an access history map suitable for recommended item introduction processing. A second means for receiving, from a client, an evaluation value indicating a degree of preference of the client for a specific item, and a third means for receiving a recommended item introduction request from the client. Means for generating a recommended item list based on an evaluation value of an item for the client and an access history map for the client which has transmitted the recommended item introduction request; and Client that sent the request Recommended item introduction apparatus characterized by having a a fifth means for transmitting. 22. The first means obtains each access history map as a list of item identifiers and distances for each client identifier or a list of client identifiers and distances for each item identifier. 22. The recommended item introduction device according to claim 21, wherein information readable from an access history including information on the number of times of access to the item or the date and time when the item was most recently accessed is calculated. 23. The fourth means, wherein a list of a predetermined number of upper item identifiers in a list of item identifiers and evaluation values for each client identifier, or a list of item identifiers of items whose evaluation values are equal to or more than a predetermined value is provided. Extracting a group of highly evaluated items related to the client, and extracting a group of related clients given by a list of client identifiers stored in the access history map for each item identifier included in the extracted group of highly evaluated items. The extracted related client group is narrowed down, and for each client identifier included in the narrowed down related client group, a related item group given by a list of item identifiers stored in the access history map is extracted and extracted. Narrow down related items 23. The recommended item introduction device according to claim 22, wherein a recommended item list is obtained. 24. The fourth means sorts the related client groups in descending order of the number of accesses to the extracted high-rated item groups, and sorts a predetermined number of related clients higher than the sorted related client groups. By setting a new related client group, the related client group is narrowed down, and the related item groups are rearranged in descending order of the number of accesses from the obtained new related client group. 24. The recommended item introduction device according to claim 23, wherein the related item group is narrowed down by setting the item (c) as the recommended item list. 25. A client from which an access history of browsing / purchasing items by a client is collected and a client from which an access history is not collected from an item provider server which provides an item to a plurality of clients via a network. The first to receive and store the access history collection target client data shown
Means and a client's access history from the item provider server, and based on the access history collection target client data stored in the first means, only the access history of the client whose access history is to be collected is stored in the item provider / server. A second means for extracting from the access history received from the server, converting only the extracted access history into an access history map suitable for recommended item introduction processing and storing the same, and a third means for receiving a recommended item introduction request from a client. Means, a fourth means for generating a recommended item list based on an access history map for the client which has transmitted the recommended item introduction request, and a method for transmitting the recommended item list to the client which has transmitted the recommended item introduction request. Recommended item introduction apparatus characterized in that it comprises a fifth means for signal, a. 26. The third means receives, along with a recommended item introduction request, a list of a client identifier of a client and an item identifier of an item accessed by the client itself, and the fourth means comprises the third means 26. The recommended item introduction device according to claim 25, wherein the recommended item list is generated based on the list of the item identifiers received in (1). 27. An access history of a client whose access history is not to be collected is stored separately from an access history of a client whose access history is to be collected based on the access history collection target client data stored by said first means. The apparatus further includes a sixth unit, wherein the fourth unit generates a recommended item list based on an access history map obtained from the client when the client is a collection target of the access history,
26. The recommended item introduction device according to claim 25, wherein, if the client is not the access history collection target, the recommended item list is generated based on the access history for the client stored by the sixth means. 28. The apparatus according to claim 26, further comprising: a sixth unit for receiving and storing, from a client, an evaluation value indicating a degree of preference of the client for a specific item, wherein the fourth unit is the sixth unit. 26. The recommended item introduction device according to claim 25, wherein the recommended item list is generated based on the stored evaluation value of the item for the client. 29. The first means obtains each access history map as a list of item identifiers and distances for each client identifier or a list of client identifiers and distances for each item identifier. 26. The recommended item introduction device according to claim 25, wherein the readable information is calculated from an access history including information on the number of times of access to the item or the date and time when the item was most recently accessed. 30. The fourth means, wherein a list of a predetermined number of upper item identifiers in a list of item identifiers and evaluation values for each client identifier, or a list of item identifiers of items whose evaluation values are equal to or more than a predetermined value is provided. Extracting a group of highly evaluated items related to the client, and extracting a group of related clients given by a list of client identifiers stored in the access history map for each item identifier included in the extracted group of highly evaluated items. The extracted related client group is narrowed down, and for each client identifier included in the narrowed down related client group, a related item group given by a list of item identifiers stored in the access history map is extracted and extracted. Narrow down related items, 30. The recommended item introduction device according to claim 29, wherein a recommended item list is obtained. 31. The fourth means sorts the related client groups in descending order of the number of accessing the extracted high-rated item groups, and sorts a predetermined number of related clients higher than the sorted related client groups. By setting a new related client group, the related client group is narrowed down, and the related item groups are rearranged in descending order of the number of accesses from the obtained new related client group. 31. The recommended item introduction device according to claim 30, wherein the related item group is narrowed down by setting the item (c) as the recommended item list. 32. An item provider server that provides an item to a plurality of clients via a network, a client for which an access history of browsing / purchasing items by the client is to be collected and a client for which an access history is not to be collected. First means for receiving the access history collection target client data, sending an access history transmission request to a client whose access history is to be collected, and sending an access history transmission stop request to a client whose access history is not to be collected; Receive the access history from the client whose access history is to be collected, convert the access history into an access history map suitable for recommended item introduction processing, and save it.
A third means for receiving a recommended item introduction request from a client; a fourth means for generating a recommended item list based on an access history map for the client which transmitted the recommended item introduction request; And a fifth means for transmitting the recommended item list to the client which has transmitted the recommended item introduction request. 33. The recommended item introduction device according to claim 32, further comprising sixth means for receiving and recording a list of item identifiers of items to be distributed together with an item distribution request from the item provider server. 34. A sixth means for incrementing the number of history receptions of each client when an access history is received from each client; and periodically counting the number of history receptions of each client; 33. The recommended item introduction device according to claim 32, further comprising a seventh means for transmitting to the item provider server. 35. The second means obtains each access history map as a list of item identifiers and distances for each client identifier or a list of client identifiers and distances for each item identifier. 33. The recommended item introduction device according to claim 32, wherein the readable information is calculated from an access history including information on the number of times of access to the item or the date and time when the item was most recently accessed. 36. The third means receives a list of a client identifier of a client and an item identifier of an item accessed by the client itself, together with a recommended item introduction request. 33. The recommended item introduction device according to claim 32, wherein the recommended item list is generated based on the list of the item identifiers received in step (a). 37. The fourth means accesses an item of each item identifier included in the list of item identifiers received by the third means, based on the access history map stored by the second means. A related client group, which is given by a list of client identifiers of the clients being extracted, and narrows down the extracted related client group. Based on the access history map saved by the second means, the related client group is narrowed down. 37. A related item group given by a list of item identifiers of an item being accessed by a client of each included client identifier is extracted, and the extracted related item group is narrowed down to obtain the recommended item list. Recommended item introduction device described. 38. The fourth means reorders the related client groups in descending order of the number of accessing items of each item identifier included in the list of item identifiers received by the third means. The related client group is narrowed down by setting a predetermined number of related clients above the related client group as a new related client group, and the related item groups are arranged in descending order of the number of accesses from the obtained new related client group. 38. The recommended item introduction device according to claim 37, wherein the related item group is narrowed down by using a predetermined number of items of the rearranged and rearranged related item group as the recommended item list. 39. The fourth means reorders the related client groups in descending order of the number of accessing items of each item identifier included in the list of item identifiers received by the third means. The related client group is narrowed down by setting a predetermined number of related clients above the related client group as a new related client group, and is included in the recommended item list in the descending order of the number of accesses from the obtained new related client group. 38. The recommended item introduction device according to claim 37, wherein the sorted item groups are rearranged, and a related item group is narrowed down by setting a predetermined number of items above the rearranged item group as a new recommended item list. 40. An item provider server which provides items to a plurality of clients via a network, receives an access history of browsing / purchasing items by the client, and converts the access history into an access history map suitable for recommended item introduction processing. A first program code for storing and storing, from a client, an evaluation value indicating a degree of preference of the client for a specific item, a second program code for storing, and a recommended item introduction request from the client A third program code; a fourth program code for generating a recommended item list based on an evaluation value of an item for the client and an access history map for the client which has transmitted the recommended item introduction request; and the recommended item list. , Recording medium recording a recommended item referral program, characterized in that it comprises a fifth program code to be sent to the client that sent the recommended item presentation request, the. 41. An item provider server that provides an item to a plurality of clients via a network, a client for which an access history of browsing / purchasing an item by a client is to be collected and a client for which an access history is not to be collected. The first to receive and store the access history collection target client data shown
Receiving the client's access history from the item provider server and storing only the access history of the client whose access history is to be collected based on the access history collection target client data stored by the first means. A second program code for extracting from the access history received from the server, converting only the extracted access history into an access history map suitable for the recommended item introduction processing and storing the same, and a second program code for receiving a recommended item introduction request from the client. A third program code, a fourth program code for generating a recommended item list based on an access history map for the client which transmitted the recommended item introduction request, And a fifth program code to be transmitted to the client that has transmitted the recommended item introduction request. 42. An item provider server that provides an item to a plurality of clients via a network, a client for which an access history of browsing / purchasing items by the client is to be collected and a client for which an access history is not to be collected. A first program code for receiving the access history collection target client data, sending an access history transmission request to a client whose access history is to be collected, and sending an access history transmission stop request to a client whose access history is not to be collected; Receiving an access history from a client whose access history is to be collected, converting the access history into an access history map suitable for recommendation item introduction processing, and storing the converted access history.
And a third program code for receiving a recommended item introduction request from a client, and a fourth item for generating a recommended item list based on an access history map for the client which transmitted the recommended item introduction request. A recording medium recording a recommended item introduction program, comprising: a program code; and a fifth program code for transmitting the recommended item list to a client that has transmitted a recommended item introduction request.