JP5422249B2 - Content distribution system and content distribution method - Google Patents

Description

  The present invention relates to a content distribution system and a content distribution method for distributing content to mobile terminals.

  2. Description of the Related Art Conventionally, a technique for distributing content that meets user preferences based on the position of a mobile terminal and the attributes of the user of the terminal is known. For example, in Patent Document 1 below, the position of a mobile phone calculated based on base station information and its detection time are accumulated as an action log, and the stay time is calculated based on the action log. A system for distributing content that matches the above to a mobile phone is disclosed.

JP 2002-324079 A

  However, since the area covered by the conventional base station is as wide as several hundred m to several km, it is difficult to specify the detailed position of the mobile terminal (user). Therefore, when determining the distribution content based on the location information of the mobile terminal, there is a possibility that content that does not match the user's place of stay or behavior is selected.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a content distribution system and a content distribution method capable of distributing content suitable for a user's staying place and behavior.

The content distribution system of the present invention is related to a user attribute of a mobile terminal, content data distributed to the mobile terminal, a database that stores the content data distribution area in association with each other, a content data distribution area, an advertisement Among the areas composed of a plurality of femtocells whose number is determined in consideration of the effect, the position information of the femto base station that covers one femtocell where the mobile terminal is located, and the position information Position acquisition means for acquiring the time of movement of the mobile terminal for one femtocell, and calculation means for calculating the time of movement of the mobile terminal in the area based on the position information and the time of arrival acquired by the position acquisition means; , if the serving time calculated by the calculation means is equal to or greater than a predetermined threshold value, the user attributes of the mobile terminal and the mobile terminal A content obtaining means for reading the content data from the database corresponding to the area composed of a plurality of femtocell configured to include one of a femto cell visited, mobile terminal the content data read by the content acquiring means And transmitting means for transmitting to.

In addition, the content distribution method of the present invention is a content distribution executed by a content distribution system including a database that stores an attribute of a user of a mobile terminal, content data distributed to the mobile terminal, and a distribution area of content data in association with each other A method that is associated with a distribution area of content data, and includes one femtocell in which a mobile terminal is located among areas composed of a plurality of femtocells whose number is determined in consideration of advertising effectiveness. A position acquisition step of acquiring the position information of the femto base station to be covered and the time of movement of the mobile terminal for one femtocell corresponding to the position information; and the position information and the time of acquisition acquired in the position acquisition step. And a calculation step for calculating a mobile terminal's stay time in the area based on Area constructed when visiting the calculated time is greater than a predetermined threshold value, a plurality of femtocell configured to include one of the femtocell user attributes and the mobile terminal of the mobile terminal is serving at The content acquisition step which reads the content data corresponding to these from a database, The transmission step which transmits the content data read in the content acquisition step to a mobile terminal is characterized by the above-mentioned.

  According to such a content distribution system and content distribution method, when a mobile terminal has been in a certain time or longer in an area formed by combining a plurality of femtocells having a communicable range of about several tens of meters, the position of the mobile terminal And the content of the user are determined based on the user attributes and transmitted to the mobile terminal. Since the range of the femtocell is considerably smaller than the coverage area (macrocell) of the conventional base station, the position of the mobile terminal (user) can be obtained with high accuracy. On the other hand, when trying to determine the distribution content based on the time of stay of one femtocell, inconvenience such as selecting content data related to a location that has already passed may occur depending on the user's behavior pattern. obtain. Therefore, by calculating the stay time for an area composed of a plurality of femtocells, it is possible to acquire the detailed position of the mobile terminal and select content data that matches the user's action. As a result, it is possible to distribute content that matches the user's stay location, behavior, time, and the like.

In the content distribution system of the present invention, the position information and the serving time each, when the mobile terminal enters to a femto cell constituting the area, the position of the femto base station that covers the one femtocell, and the time , and the calculating means, the time from the first to the entered time to time went to another femtocell within the area to the area, the extension number of the femtocell of the area containing the mobile terminal at said time It is preferable to calculate the staying time by performing a correction that adds values based on a function that increases as the number increases .

  In this case, whether the time based on the time of entry to each femtocell is corrected based on the movement status of the mobile terminal in the area, and the content is distributed using that time Decide whether or not. As a result, it is possible to distribute the content at a more appropriate time as compared with the case where the determination is made based on the simple time in the service area.

In the content distribution system of the present invention, the position information and the serving time each, when the mobile terminal enters to a femto cell constituting the area, the position of the femto base station that covers the one femtocell, and the time Preferably, the calculation means sets the time from the time when the first entry is made to the area to the time when the second entry is made to another femtocell in the area as the in-zone time.

  In this case, since it is determined whether or not the content is to be distributed using the staying time calculated based on the entry time to each femtocell, the content can be distributed at an appropriate time.

In the content distribution system of the present invention, the position information and the serving time each, when the mobile terminal enters to a femto cell constituting the area, the position of the femto base station that covers the one femtocell, and the time It is preferable that the calculation means sets the time from the first entry into the area to the current time as the staying time.

  In this case, the content is distributed when a predetermined time has elapsed since the mobile terminal first entered the area. Therefore, even when the mobile terminal does not move from the first femtocell, it can be detected that the terminal has been in the area for a certain period of time or more to deliver the content.

  According to such a content distribution system and content distribution method, when the mobile terminal is present in an area composed of a plurality of femtocells for a certain period of time or longer, based on the position of the mobile terminal and the user attribute Since the distribution content is determined, it is possible to distribute the content that matches the user's place of stay and behavior.

It is a figure showing the whole contents distribution system composition concerning an embodiment. It is a figure which shows the function structure of the advertisement server shown in FIG. It is a figure which shows the hardware constitutions of the advertisement server shown in FIG. It is a figure which shows the data which the content database shown in FIG. 1 memorize | stores, (a) is an advertisement table, (b) is a user table. It is a figure which shows the data which the femto database shown in FIG. 1 memorize | stores. It is a figure for demonstrating the determination method of the threshold value which the calculation part shown in FIG. 1 uses. It is a flowchart which shows operation | movement of the content delivery system (advertisement server) shown in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or equivalent elements are denoted by the same reference numerals, and redundant description is omitted.

  First, the configuration and function of the content distribution system 1 according to the embodiment will be described with reference to FIGS.

  The content distribution system 1 is a computer system that selects advertisement content based on user behavior and attributes and transmits it to the mobile terminal M. Note that the type of content distributed by the content distribution system 1 is not limited, and various types of content such as regional information and event information may be distributed.

  As shown in FIG. 1, the content distribution system 1 includes a mobile terminal M and a femtocell micro base station (hereinafter referred to as a “femto base station”) B that transmits and receives signals directly between the mobile terminal M, A base station controller (Radio Network Controller: RNC) 2 that connects the femto base station B and the core network, a SGSN (Serving GPRS Support Node) 3 that performs location management, access control, and the like, a core network, and an external network GGSN (Gateway GPRS Support Node) 4 that is a connection point of the mobile phone, a GMSC (Gateway Mobile-services Switching Center) 5 that receives signals from an external network, and a subscriber that stores subscriber information and location information of the mobile terminal M A database (Home Location Register: HLR) 6 and an advertisement server 10 are provided.

  As the mobile terminal M, for example, a mobile phone or a personal digital assistant (PDA) can be considered, but the type of the mobile terminal M is not limited. Further, the communication path between the mobile terminal M and the advertisement server 10 is not limited to the one shown in FIG. 1, and the present invention can be applied to any network configuration.

  In FIG. 1, a femtocell C indicates a communication range covered by each femto base station B. The range of the femtocell C is, for example, several tens of meters. A set of femtocells C is indicated by a femtocell group G. The femtocell group G is an area composed of a plurality of femtocells C. As shown in FIG. 1, the femtocells C in the femtocell group G may or may not be adjacent to each other. In FIG. 1, the femtocell group G includes three femtocells C, but the size of the femtocell group may be arbitrarily determined. For example, two femtocells may be grouped or ten femtocells may be grouped in consideration of the advertising effect. Although only one femtocell group G is shown in FIG. 1, the number is not limited.

  The femtocell group G can be applied to any location, but can be applied within a predetermined range, for example, in the vicinity of a station, near an office district, near a bus stop, near an intersection, downtown, a park, a shopping street, and the like.

  In addition, when several femtocell groups G already exist, it may be determined arbitrarily to which group G the femtocell C corresponding to the newly installed femto base station B is added. For example, the femtocell group G may be added to the femtocell group G having the shortest distance to the new femtocell C, or the femtocell C may be added to a specific group G based on road laying conditions regardless of the distance. Cell C may be added.

  First, a series of flows from obtaining the location information of the mobile terminal M to transmitting advertisement data (content data) to the mobile terminal M will be described. When the mobile terminal M enters the communication area (femtocell C) of a certain femto base station B, a location registration process is executed, and the terminal ID of the mobile terminal M, the base station ID of the femto base station B, and the femto base station B Data including the position information (latitude and longitude) and the time of entry to the femtocell C is transmitted from the RNC 2 to the SGSN 3. SGSN 3 determines whether or not mobile terminal M is located under femtocell C based on the received data. If the mobile terminal M is located in the femtocell C, the SGSN 3 adds flag information (hereinafter referred to as “femto located flag”) to the data and transmits the data to the GGSN 4. The GGSN 4 transfers the received data to the advertisement server 10.

  The advertisement server 10 extracts advertisement data based on the data received from the GGSN 4 and transmits it to the mobile terminal M. The processing in the advertisement server 10 will be described in detail below. The advertisement data is first received by GMSC5. The GMSC 5 inquires of the HLR 6 about the current position of the mobile terminal M using the terminal ID received at the same time. And GMSC5 transmits advertisement data to SGSN3 corresponding to the acquired position information. Thereafter, the advertisement data reaches the mobile terminal M from the SGSN 3 via the corresponding RNC 2 and femto base station B.

  Next, the functional configuration of the advertisement server will be described with reference to FIG. The advertisement server 10 includes, as functional components, an advertisement database 11, a position acquisition unit (position acquisition unit) 12, a femto database 13, a calculation unit (calculation unit) 14, a content acquisition unit (content acquisition unit) 15, and a transmission unit (transmission unit). ) 16.

  As shown in FIG. 3, the advertisement server 10 includes a CPU 101 that executes an operating system, application programs, and the like, a main storage unit 102 that includes a ROM and a RAM, an auxiliary storage unit 103 that includes a hard disk, and a network. The communication control unit 104 includes a card, an input unit 105 such as a keyboard and a mouse, and an output unit 106 such as a monitor and a printer. Each function shown in FIG. 2 reads predetermined software on the CPU 101 or the main storage unit 102, operates the communication control unit 104 under the control of the CPU 101, and stores data in the main storage unit 102 or the auxiliary storage unit 103. This is realized by reading and writing.

  The advertisement database 11 is a part that stores the attribute of the user of the mobile terminal M, the content data distributed to the mobile terminal M, and the content data distribution area in association with each other. The advertisement database 11 includes an advertisement table shown in FIG. 4A and a user table shown in FIG. The advertisement table stores advertisement information in which an area ID for identifying a distribution area, advertisement data indicating the contents of the advertisement, a sex and an age group to be distributed, and a distribution time (may be a distribution time zone) are associated with each other. doing. On the other hand, the user table stores user information in which a user ID for identifying a user and an attribute of the user (for example, gender, age, address, work place, hobby, etc.) are associated. However, the configuration of the table in the advertisement database 11 is not limited to that shown in FIG. 4, and various modifications are possible.

  The location acquisition unit 12 is a portion that acquires location information of mobile terminals that exist in an area constituted by a plurality of femtocells, that is, femtocell groups, and a location time corresponding to the location information. When the location acquisition unit 12 receives data from the GGSN 4, the location acquisition unit 12 determines whether or not the femto presence flag is included therein (whether or not the mobile terminal M is located under the femto cell C). If the femto presence flag is included, the location acquisition unit 12 outputs the received terminal ID, location information, and entrance time to the calculation unit 14. Note that the position acquisition unit 12 may receive the data related to a certain mobile terminal M a plurality of times, and executes the above processing each time.

The femto database 13 is a part that stores information on femtocell groups. Specifically, the femto database 13 includes a group ID indicating a femto cell group, base station IDs and position information (latitude / longitude) of a plurality of femto base stations belonging to the group, and the presence of the mobile terminal M in the group. A plurality of group information items associated with the threshold time threshold value _Tmax are stored. For example, as shown in FIG. 5, the femto database 13 includes a group ID “G1” and base station IDs and position information “C11, (Lat11, Lng11)”, “C12, (Lat12) related to the two femto base stations to which the group belongs. , Lng12) ”and the threshold value“ T _max 1 ”are stored.

The threshold value T _max is a value used to determine whether or not to distribute advertisement data to the mobile terminal M, and is calculated based on the distance between two femto cells that are farthest from each other in the femto cell group. . For example, in the case of a femtocell group Ga including five femtocells C1 to C5 as shown in FIG. 6, the distance L (C1, C4) between the femtocells C1 and C4 is the longest. The threshold value T _max corresponding to Ga is determined based on the distance L (C1, C4). Generally, femto cells C1, the distance between C2 and be expressed as that L (C1, C2), C1 to femtocell in the group, C2, ..., when the Cn, the threshold _{T max} by the following formula Calculated.
T _max = max (L (C1, C2), L (C1, C3), ..., L (C1, Cn),
..., L (C (n-1), Cn)) / a (1)
Here, a is a constant for converting distance to time, and its dimension is the same as speed.

  Although a can be set arbitrarily, as an example, it can be considered that a speed slower than a general walking speed is applied to a. This is because if a user simply walks within a femtocell group, it cannot be said that the user is staying in the group (in the area), and this situation is excluded from the advertisement distribution target. This is because it is preferable.

  The calculation unit 14 is a part that calculates the stay time of the mobile terminal M in the femtocell group G based on the position information and the stay area information acquired by the position acquisition unit 12.

  When the terminal ID, the position information, and the entrance time regarding the mobile terminal M are input first, the calculation unit 14 starts measuring the stay time. The calculation unit 14 reads out the group ID corresponding to the position information from the femto database 13 to identify the femto cell group in which the mobile terminal M has entered, and holds the group ID. Further, the calculation unit 14 holds the entrance time as the group entrance time Tx.

Thereafter, when the mobile terminal M enters another femtocell C and new location information and entry time for the same terminal ID are input, the calculation unit 14 assigns the group ID corresponding to the location information to the femto database. 13 and it is determined whether or not the group ID is the same as that read last time. At this time, if both are the same, that is, if the mobile terminal M continues to exist in one femtocell group, the calculation unit 14 reads the threshold _Tmax corresponding to the group ID from the femto database 13.

Then, the calculation unit 14 uses the currently entered entry time Ty, the group entry time Tx that is held, the number of location registrations P within the same femtocell group, and the read threshold value _Tmax , It is determined whether the following formula (2) is satisfied. Here, the location registration count P can also be referred to as location information acquisition count, and indicates the total number of femtocells C in which a mobile terminal M has entered a certain femtocell group G.
Ty−Tx + f (P)> = T _max (2)

  Here, f (P) is a function derived from the stay time (Ty−Tx) and the number of times of location registration P, and can also be referred to as a function for converting the number of times of location registration into time. The function f (P) takes such a value that the above equation (2) is finally established even if the location time (Ty−Tx) is short if the position registration count P is large. This means that if the mobile terminal M continues to move sufficiently within a certain femtocell group, the mobile terminal M is targeted for advertisement distribution even if the stay time is short. Therefore, it can be said that the left side of the above equation (2) indicates the stay time corrected based on the number of position registrations.

Although f (P) may be arbitrarily defined, for example, f (p) may be defined as in the following formula (3).
f (P) = (Ty−Tx) / K × P (3)
However, K is the reference | standard femto number predetermined for every femtocell group. The reference femto number K may be arbitrarily determined based on the shape of the femtocell group, the local situation (arrangement situation of facilities, roads, and the like). Here, as an example, the maximum value of the number of femtocells that may enter when a femtocell group is linearly traversed is defined as a reference femto number K.

If f (p) is expressed by the above formula (3) and a certain femtocell group is linearly traversed, there may be a case where a maximum of 10 femtocells may be entered. The reference femto number K of the group is stored in advance as 10. For example, if the threshold _Tmax of the femtocell group is 50 (minutes) and the current time in the femtocell group is (Ty−Tx) 30 (minutes), f (p )> = 50-30 = 20 (2 ′)
From the above equation (3), f (p) = 30/10 × P = 3 × P (3 ′)
It is. Therefore, in this case, from the above formulas (2 ′) and (3 ′), if the mobile terminal M has entered a total of seven or more femtocells at that time, the mobile terminal M becomes an advertisement distribution target. .

If the above equation (2) is satisfied, that is, if the estimated value of the stay time is equal to or greater than the threshold value _Tmax , the calculation unit 14 generates an instruction signal for distributing the advertisement data to the mobile terminal M and generates the content acquisition unit. 15 is output. This instruction signal includes the terminal ID.

On the other hand, if the formula (2) is not satisfied, that is, if the estimated value of the staying time is less than the threshold value _Tmax , the calculation unit 14 also relies on the formula (2) based on the information newly input from the position acquisition unit 12. 2) is recalculated, and the same determination process as described above is executed.

  When the group ID corresponding to the newly input position information is different from the currently held group ID, the calculation unit 14 does not perform the calculation of (2) above, but holds the held group ID and the group input. The zone time Tx is changed to a new group ID and a newly entered zone time, respectively. Then, the calculation unit 14 waits for the next input.

  The content acquisition unit 15 receives advertisement data corresponding to the user attribute of the mobile terminal M and the position of the mobile terminal M from the advertisement database 11 when the stay time calculated by the calculation unit 14 is equal to or greater than a predetermined threshold. This is the part to read.

  When the instruction signal is input from the calculation unit 14, the content acquisition unit 15 stores a user ID corresponding to the terminal ID included in the instruction signal and an area ID corresponding to the location information of the mobile terminal, using a database (not shown) or Obtain using a table. In order to omit such processing, information indicating an area range may be added to the advertisement information, and a terminal ID may be added to the user information. When the distribution area and the femtocell group are completely matched, the content acquisition unit 15 can specify the area ID with reference to the femto database 13. Subsequently, the content acquisition unit 15 reads advertisement data corresponding to the area ID and the user ID from the advertisement database 11 and outputs the advertisement data to the transmission unit 16 together with the terminal ID.

  The transmission unit 16 is a part that transmits the advertisement data read by the content acquisition unit 15 to the mobile terminal M. Although the transmission part 16 delivers advertisement data and terminal ID, for example by a SMS-push function, the specific means of transmission is not limited to this. The transmitted advertisement data reaches the mobile terminal M via the GMSC 5, SGSN 3, RNC 2, and femto base station B as described above.

  Next, the operation of the content distribution system 1 (advertisement server 10) shown in FIG. 1 will be described with reference to FIG. 7, and the content distribution method according to the present embodiment will be described.

  When the mobile terminal M enters a certain femtocell C and its location information and entry time are sent to the advertisement server 10, the location acquisition unit 12 acquires the location information and entry time (step S11). , Position acquisition step). Further, the position acquisition unit 12 checks the femto presence flag to determine whether or not the mobile terminal M is in the femto cell C.

  If it is determined that the mobile terminal M is located in the femtocell C (step S12; YES), the calculation unit 14 first acquires the position information and the time of entry, the position information acquired thereafter, and Based on the entry time, the time of stay of the mobile terminal M in one femtocell group is calculated (step S13, calculation step). Specifically, the calculation unit 14 holds the group ID corresponding to the position information acquired first, and holds the entrance time acquired at the same time as the group entrance time. And if it is the same as what the group ID corresponding to the positional information input after that has hold | maintained, the calculation part 14 will perform calculation of said Formula (2). On the other hand, when the two terminal IDs do not match because the mobile terminal M has moved to another femtocell group G, the calculation unit 14 sets the group ID and the group entry time held by the calculation unit 14 to the current group ID and entry area. Change to time.

In the calculation of the above equation (2), if the stay time is equal to or greater than the threshold T _max (step S14; YES), the content acquisition unit 15 locates the user attribute indicated by the user ID and the mobile terminal M. Advertisement data corresponding to the area is acquired from the advertisement database 11 (step S15, content acquisition step). Finally, the transmission unit 16 transmits the advertisement data to the mobile terminal M (step S16, transmission step). Thereby, the user of the mobile terminal M can see an advertisement corresponding to his / her attribute and the current location.

On the other hand, if the calculated stay time is less than the threshold value _Tmax (step S14; NO), the calculation unit 14 executes the process of step S13 again.

  As described above, according to the present embodiment, the position of the mobile terminal M when the mobile terminal M has been in the area (femtocell group G) formed by combining a plurality of femtocells C for a predetermined time or more. Advertisement data is determined based on the user attributes and transmitted to the mobile terminal M. Thus, by using the femto base station B and grasping the location status of the mobile terminal M for each range wider than the single femtocell C, the user's detailed staying place, behavior, time, etc. are met. It becomes possible to deliver advertisements.

  In addition, according to the present embodiment, the time based on the time of entry to each femtocell C is corrected based on the movement status of the mobile terminal M in the femtocell group G, thereby calculating the staying time, It is determined whether or not the advertisement is distributed using the time in the service area. Thereby, it is possible to distribute the advertisement at a more appropriate time as compared with the case where the determination is made based on the simple time in the service area.

  The present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above embodiment. The present invention can be modified in various ways as described below without departing from the scope of the invention.

In the above-described embodiment, the calculation unit 14 calculates the staying time in which the staying time (Ty−Tx) in the femtocell group G is corrected based on the number of position registrations P, and the staying time and the threshold T _max are calculated. Although the necessity of advertisement distribution is determined by comparison (see the above formula (2)), the method for determining the necessity of content distribution is not limited to this.

First, it is conceivable to simply determine whether the staying time in the femtocell group G is _{equal to} or greater than the threshold value T _max without considering the number of location registrations. That is, the calculation unit 14 determines whether or not the following formula (4) is established based on the group entry time Tx and the currently entered entry time Ty. May be output to the content acquisition unit 15. In this case, the determination process can be executed with a simpler calculation than in the above embodiment.
Ty−Tx> = T _max (4)

In addition, after obtaining the group entry time Tx, the calculation unit 14 outputs an instruction signal when the threshold T _max has elapsed without obtaining the next entry time Ty, that is, when the following equation (5) is satisfied. You may output to the content acquisition part 15. FIG. By using Expression (5), even when the mobile terminal M does not move from one femtocell C in the femtocell group G, the location status of the mobile terminal M can be determined.
(Current time) −Tx> = T _max (5)

  Further, the calculation unit 14 may output an instruction signal when any of the above formulas (4) and (5) is satisfied, or any one of the above formulas (2) and (5). An instruction signal may be output when is established.

  DESCRIPTION OF SYMBOLS 1 ... Content distribution system, 10 ... Advertising server, 11 ... Advertising database, 12 ... Position acquisition part (position acquisition means), 13 ... Femto database, 14 ... Calculation part (calculation means), 15 ... Content acquisition part (content acquisition means) ), 16... Transmitting unit (transmitting means), B... Femto base station, C... Femto cell, G.

Claims (5)

A database that stores user attributes of the mobile terminal, content data distributed to the mobile terminal, and a distribution area of the content data in association with each other;
A femto base that covers one femtocell in which a mobile terminal is located among areas composed of a plurality of femtocells that are associated with the content data distribution area and whose number is determined in consideration of the advertising effect. Position acquisition means for acquiring the position information of the station and the time of stay of the mobile terminal for the one femtocell corresponding to the position information;
Calculation means for calculating the time of stay of the mobile terminal in the area based on the position information and the time of stay acquired by the position acquisition means;
The plurality of femtocells configured to include an attribute of the user of the mobile terminal and one femtocell in which the mobile terminal is located when the located time calculated by the calculating unit is equal to or greater than a predetermined threshold Content acquisition means for reading content data corresponding to an area constituted by the database;
Transmission means for transmitting content data read by the content acquisition means to the mobile terminal;
A content distribution system comprising: The location information and the location time are respectively the location and time of a femto base station that covers the one femtocell when the mobile terminal enters the one femtocell constituting the area,
The calculation means calculates the number of femtocells in the area where the mobile terminal has entered at the time from the time when the area first entered the time until the time when the area entered another femtocell in the area. Calculate the staying time by performing a correction that adds values based on a function that increases as the number increases.
The content distribution system according to claim 1. The location information and the location time are respectively the location and time of a femto base station that covers the one femtocell when the mobile terminal enters the one femtocell constituting the area,
The calculation means, the time from the time of first entering the area to the time of entering another femtocell in the area as the stay time,
The content distribution system according to claim 1. The location information and the location time are respectively the location and time of a femto base station that covers the one femtocell when the mobile terminal enters the one femtocell constituting the area,
The calculation means sets the time from the time when the area first entered the current time to the current time,
The content delivery system as described in any one of Claims 1-3. A content distribution method executed by a content distribution system including a database that stores an attribute of a user of a mobile terminal, content data distributed to the mobile terminal, and a distribution area of the content data in association with each other,
A femto base that covers one femtocell in which a mobile terminal is located among areas composed of a plurality of femtocells that are associated with the content data distribution area and whose number is determined in consideration of the advertising effect. A location acquisition step of acquiring location information of a station and a time of stay of the mobile terminal for the one femtocell corresponding to the location information;
A calculation step of calculating the time of stay of the mobile terminal in the area based on the position information and the time of stay acquired in the position acquisition step;
The plurality of femtocells configured to include an attribute of a user of the mobile terminal and one femtocell in which the mobile terminal is located when the located time calculated in the calculating step is equal to or greater than a predetermined threshold A content acquisition step of reading content data corresponding to an area constituted by the database from the database;
A transmission step of transmitting the content data read in the content acquisition step to the mobile terminal;
A content distribution method comprising:

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