JPWO2010110216A1 - Mobile terminal, server, connection control method and connection control program for mobile terminal - Google Patents

Abstract

According to the movement status of the mobile terminal, the connection with the wireless access point is controlled to enable efficient content download. A sensor 206 that detects a moving direction of the mobile terminal, an error detecting unit 205 that detects a path error with an ideal path in a service area of a wireless access point that performs wireless communication based on the detected moving direction; The path error is compared with a first threshold set in advance according to the minimum stay time required in the service area of the wireless access point that performs wireless communication, and whether or not the wireless access point can be connected based on the comparison result A connection determination unit 202 for determining

Description

  The present invention relates to a mobile terminal, a server, a mobile terminal connection control method, and connection control that enable efficient download of content by preventing connection to a useless wireless access point when downloading content in a wireless network. Regarding the program.

  Public wireless LAN (Local Area Network) services are provided, and it is possible to download large-capacity contents such as moving images and voices using broadband communication services even when away from home.

  As a method for downloading such a large-capacity content such as a moving image or sound using a wireless LAN, there is a method using a railway station (for example, see Patent Document 1). According to the method described in Patent Document 1, a railway user requests content from a mobile terminal such as a portable terminal, and the railway station has a high-speed line environment such as a wireless LAN. Download large volumes of content to mobile terminals in the train.

  Patent Document 2 describes a method in which a data user makes a download reservation in advance and executes the download when passing through a place where a high-speed data transfer service is possible.

JP 2004-38242 A JP 2005-26977 A

  The content download method described in Patent Document 1 described above has a problem that it is limited to a specific environment called a railway system. In other words, it is premised that the station where the train passes and the staying time at the station are known in advance, and cannot cope with a situation where the user can move freely.

  In addition, the content download method described in Patent Document 2 allows a user to download content while moving in a place where the user can provide a broadband communication service such as a wireless LAN. When a part of the data is passed in a short time, there is a problem that the download is not completed during the passage and wasteful communication occurs.

(Object of invention)
An object of the present invention is to provide a mobile terminal capable of preventing the occurrence of useless communication when a mobile terminal downloads large-capacity content in a place where a broadband communication service such as a wireless LAN can be provided. The object is to provide a server, a connection control method for a mobile terminal, and a connection control program.

  Another object of the present invention is to prevent the occurrence of useless communication that does not complete downloading, thereby reducing the influence on communication of other mobile terminals and efficiently using shared resources. It is an object of the present invention to provide a mobile terminal, a server, a mobile terminal connection control method, and a connection control program capable of suppressing power consumption of the mobile terminal.

  The mobile terminal according to the present invention detects a path error between the means for detecting the moving direction of the mobile terminal and an ideal path in the service area of the wireless access point that performs wireless communication based on the detected moving direction. The detection means and the path error are compared with a first threshold value set in advance according to the minimum stay time required in the service area of the wireless access point that performs wireless communication, and based on the comparison result, Connection determination means for determining whether or not connection is possible.

  The server according to the present invention provides a service area of a wireless access point that performs wireless communication based on means for communicating with a mobile terminal that performs wireless communication with a wireless access point, and a moving direction of the mobile terminal notified from the mobile terminal. Detecting means for detecting a path error with an ideal path in the network, and comparing the path error with a first threshold set in advance according to a minimum stay time required in a service area of a wireless access point that performs wireless communication And connection determination means for determining whether or not connection to the wireless access point is possible based on the comparison result.

  A connection control method according to the present invention is a connection control method for controlling connection of a mobile terminal to a wireless access point, wherein the mobile terminal detects the moving direction of the mobile terminal and based on the detected moving direction. Detecting a path error with an ideal path in a service area of a wireless access point performing wireless communication, and detecting the path error in advance according to a minimum stay time required in the service area of the wireless access point performing wireless communication. It compares with the set 1st threshold value, and the decision | availability of the connection to a wireless access point is determined based on a comparison result.

  The connection control method according to the present invention is a connection control method for controlling the connection of a mobile terminal to a wireless access point, in which the server communicating with the mobile terminal is notified of the moving direction of the mobile terminal notified from the mobile terminal. Based on the above, the path error with the ideal path in the service area of the wireless access point that performs wireless communication is detected, and the path error corresponds to the minimum stay time required in the service area of the wireless access point that performs wireless communication. And a first threshold value set in advance, and based on the comparison result, it is determined whether or not connection to the wireless access point is possible.

  A connection control program according to the present invention is a connection control program for controlling a connection of a mobile terminal to a wireless access point. The mobile terminal detects a moving direction of the mobile terminal and detects the moving direction of the mobile terminal. Based on the processing for detecting a route error with an ideal route in the service area of the wireless access point that performs wireless communication, and the minimum stay time required in the service area of the wireless access point that performs wireless communication And a process for determining whether or not connection to the wireless access point is possible based on the comparison result.

  A connection control program according to the present invention is a connection control program for controlling connection of a mobile terminal to a wireless access point, and the moving direction of the mobile terminal notified from the mobile terminal to a server communicating with the mobile terminal Based on the above, a process for detecting a path error with an ideal path in a service area of a wireless access point that performs wireless communication, and a minimum stay time required in the service area of the wireless access point that performs wireless communication And a process for determining whether or not connection to the wireless access point is possible based on the comparison result.

  According to the present invention, it is possible to prevent useless connection to a wireless access point and reduce power consumption of a mobile terminal.

1 is a diagram illustrating an overall configuration of a wireless network system according to a first embodiment of the present invention. It is a block diagram which shows the structural example of the mobile terminal by 1st Embodiment. It is a figure which shows the example of a movement of the mobile terminal in a service area. It is a figure which shows the example of a movement of the mobile terminal in case content download is not started by a wireless access point. It is a flowchart which shows operation | movement of the mobile terminal by 1st Embodiment. It is a block diagram which shows the structural example of the mobile terminal and server by the 2nd Embodiment of this invention. It is a block diagram which shows the hardware structural example of the mobile terminal by this invention.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
Referring to FIG. 1, a wireless network system according to a first embodiment of the present invention is shown.

  In FIG. 1, the wireless network system according to the first embodiment of the present invention includes wireless access points 101-1 to 101-1 that provide service areas 102-1 to 102-n capable of broadband communication with a mobile terminal 100. 101-n, network nodes 103-1 and 103-2, and a content server 105 are included.

  The wireless access points 101-1 to 101-n and the network nodes 103-1 and 103-2 constitute a wired network 104. The mobile terminal 100 executes content download while moving in the service areas 102-1 to 102-n of the plurality of wireless access points 101-1 to 101-n. FIG. 1 shows a movement path 106 of the mobile terminal 100 as an example.

  Note that the wireless access points 101-1 to 101-n and the service areas 102-1 to 102-n in FIG. 1 are omitted from the wireless access point 101 and the service area 102, respectively, unless they need to be distinguished.

  FIG. 2 is a block diagram showing a configuration example of the mobile terminal 100 shown in FIG.

  In FIG. 2, the mobile terminal 100 includes a communication processing unit 200, a data reception processing unit 201, a sensor 206, an error detection unit 205, a stay indicator calculation unit 203, a storage unit 204, and a connection determination unit 202. And a low-speed communication unit 207.

  The communication processing unit 200 has a function of performing wireless communication with the wireless access point 101. The data reception processing unit 201 has a function of downloading content from the content server 105.

  The sensor 206 is a sensor for detecting the moving speed, moving direction, and position of the mobile terminal 100, and an acceleration sensor, a gyroscope, or a GPS (Global Positioning System) unit can be used.

  The error detection unit 205 has a function of detecting a path error between the ideal path from the moving direction of the mobile terminal 100 detected by the sensor 206 and the position of the wireless access point 101.

  The stay index calculation unit 203 has a function of calculating a stay index indicating how long the mobile terminal 100 stays in the service area.

  The storage unit 204 stores the stay index calculated by the stay index calculation unit 203.

  The connection determination unit 202 has a function of determining whether to connect to the wireless access point 101 based on the stay indicator.

  The low-speed communication unit 207 is a communication unit for performing communication using a second communication unit different from the wireless LAN.

  FIG. 3 is a diagram illustrating an example of movement of the mobile terminal 100 in the service area 102. In FIG. 3, the mobile terminal 100 enters the service area 102 at the terminal position 300-1, changes direction to the moving direction 306 at the terminal position 300-2, and leaves the service area 102 at the terminal position 300-3. The case of moving is shown. At the terminal position 300-1, there is a movement error 302 with respect to the route (ideal route) toward the wireless access point 101 located in the center of the service area 102, and at the terminal location 300-2, with respect to the ideal route. There is a movement error 305.

  FIG. 4 is a diagram illustrating an example when content download is not started at the wireless access point 101. In FIG. 4, the mobile terminal 100 moves from the terminal position 400-1 to the terminal position 400-2, and the terminal position 400-3 changes to the moving direction 403 from the terminal position 400-4 to the terminal position 400-5. An example of movement of the moving mobile terminal 100 is shown.

(Operation of the first embodiment)
Next, the overall operation of the present embodiment will be described in detail with reference to FIGS. 1 to 4 and the flowchart of FIG. FIG. 5 is a flowchart showing the operation of the mobile terminal 100.

  FIG. 1 shows an example of a content download system using a mobile terminal 100. The content is provided from the content server 105, and the user uses the mobile terminal 100 to download the content via the wireless LAN.

  A wired network 104 for downloading content includes a plurality of wireless access points 101-1 to 101-n and network nodes 103-1 and 103-2. The wireless access points 101-1 to 101-n have service areas 102-1 to 102-n that can provide communication services, and the mobile terminal 100 stores content in the service areas 102-1 to 102-n. Run the download.

  The mobile terminal 100 moves while passing through a plurality of service areas 102-1 to 102-n as indicated by a movement route 106.

  In the content download control system according to the present embodiment, the content download process is not performed in the service area 102-1 where the stay time of the mobile terminal 100 is short, and the process is executed in the service area 102-2 where the stay time is long. To control. The mobile terminal 100 is a portable information terminal such as a mobile phone having a wireless LAN interface or a PDA (Personal Digital Assistant).

  The mobile terminal 100 detects a radio wave from the wireless access point 101 and determines whether it has entered the service area 102 (step S500). The error detection unit 205 calculates a path error with an ideal path from the moving direction and position information of the mobile terminal 100 detected by the sensor 206 and the position information of the wireless access point 101 (step S501).

  Here, the ideal route indicates a straight route connecting the point where the mobile terminal 100 enters the service area 102 and the wireless access point 101. In other words, the ideal route indicates a route in which the user can stay in the service area 102 for the longest time when the user goes straight ahead.

  The location information of the wireless access point 101 is notified through the low-speed communication unit 207, or the location information of the wireless access point 101 is stored in advance in the mobile terminal 100, and a method of determining the location is used. Can be obtained.

  The connection determination unit 202 determines whether to connect to the wireless access point 101 based on the calculated path error (step S502).

  If the path error is smaller than the preset threshold value (T1) in step S502, the communication processing unit 200 connects to the wireless access point 101 (step S510), and the data reception processing unit 201 downloads content from the content server 105. Is started (step S511).

  Here, as the threshold value (T1), a value that can obtain a minimum stay time necessary for downloading the content in the route error with respect to the ideal route is set. Since this minimum stay time is not fixed but changes according to the size of the content to be downloaded, etc., a different value is set according to the minimum stay time required for the threshold (T1).

  That is, if the calculated route error is smaller than the threshold value (T1), sufficient stay time can be obtained in the service area 102, so that the communication processing unit 200 connects to the wireless access point 101 without calculating a stay index described later. To start downloading the content.

  If the route error is larger than the threshold value T1 in step S502, the stay indicator calculation unit 203 calculates a stay indicator from the route error (step S503), and stores the stay indicator in the storage unit 204 (step S504).

  The connection determination unit 202 determines whether or not the mobile terminal 100 has left the service area 102 by radio waves from the wireless access point 101 detected by the communication processing unit 200 (step S505). When the mobile terminal 100 leaves the service area 102, the stay indicator stored in the storage unit 204 is deleted, and the process ends.

  It is checked whether or not the moving direction of the mobile terminal 100 has changed using the sensor 206 (step S506). When the movement direction changes, the error detection unit 205 calculates a path error between the movement direction before the change and the wireless access point 101 and a path error between the movement direction after the change and the wireless access point 101 (step S507).

  The stay indicator calculation unit 203 calculates a stay indicator according to how much the route error after movement has changed from the route error before movement, and combines the stay indicator stored in the storage unit 204 with a new stay indicator. Recalculation is performed (step S508).

  The connection determination unit 202 compares the recalculated stay index with a preset threshold value T2 (step S509). When the recalculated stay index is larger than the threshold T2, the connection determination unit 202 makes a connection request to the wireless access point 101 to the communication processing unit 200, and the communication processing unit 200 performs connection processing with the wireless access point 101. This is performed (step S510). When the connection with the wireless access point 101 is established, the data reception processing unit 201 starts downloading content from the content server 105 (step S511).

  When the recalculated stay index is smaller than the threshold T2, the recalculated stay index is stored in the storage unit 204 (step S504). Then, the processes in steps S505 to S509 in FIG. 5 are repeatedly executed until the conditions for exiting the service area 102 or starting the download are satisfied.

  The connection determination process of the wireless access point 101 will be described in detail with reference to FIGS.

  According to FIG. 3, the mobile terminal 100 enters the service area 102 in the movement direction 301 at the terminal position 300-1, changes to the movement direction 306 at the terminal position 300-2, and changes to the service area 102 at the terminal position 300-3. Move to leave.

  At the terminal position 300-1, a route error 302 when entering the service area 102 in the moving direction 301 is calculated. The path error 302 indicates a deviation between the ideal path 303 and the movement direction 301 at the terminal position 300-1, and is represented by an angle of 0 to 90 degrees. A route error of 0 degrees indicates that the stay time of the service area 102 is maximized when the mobile terminal 100 is assumed to travel straight, and a stay error of 90 degrees is minimized. It is shown that.

  When the path error 302 at the terminal position 300-1 is smaller than the threshold value T1, the mobile terminal 100 connects to the wireless access point 101 and executes content download processing. When the threshold value is equal to or greater than T1, a stay indicator is calculated and stored in the storage unit 204.

The stay index is a numerical value of the time ratio at which the mobile terminal 100 stays in the service area 102, and is calculated so as to satisfy the following conditions.
(1) The stay indicator increases as the route error from the ideal route decreases.
(2) When the moving direction is changed in the service area 102, the stay indicator is increased for the route error after the change is smaller than the route error before the change.
(3) When the route error after changing the moving direction exceeds 90 degrees, that is, when leaving the wireless access point 101, a negative stay index is set.
(4) A stay indicator is calculated every time the direction of movement is changed, and added to the stored stay indicator to obtain a new stay indicator.

An example of a method for calculating the stay index that satisfies the above-described conditions is shown in Formula 1.

The calculation of the stay index will be specifically described with reference to FIG.
Here, the threshold T1 and the threshold T2 are 45 degrees and 5 degrees, respectively. Let constants A and B in Equation 1 be 10 and 5, respectively. Further, the route error θ ₀ (302 in FIG. 3) at the time of entering the service area 102 is 60 degrees, and the route error φ ₁ before the change in the first change of the moving direction at the terminal position 300-2 (FIG. 3). 304) is 90 degrees, and the changed path error θ ₁ (305 in FIG. 3) is 30 degrees.

First, upon entering the service area 102, and it compares the path error theta ₀ and the threshold T1 (step S502). Since the route error θ ₀ (= 60 degrees)> threshold value T1 (= 45 degrees), the stay index is calculated (step S503). When the stay index is calculated using the first term of Equation 1, the stay index “1” is obtained. This stay index is stored in the storage unit 204 (step S504).

Next, a case where the moving direction is changed at the terminal position 300-2 will be described. A stay indicator is calculated from the path error φ ₁ (= 90 degrees) before the change of the moving direction and the path error θ ₁ (= 30 degrees) after the change (step S508). When the stay index is calculated using the second term of Equation 1, the stay index “4” is obtained. Then, the last stay index “1” stored in the storage unit 204 is summed, and “5” is calculated as the stay index at the terminal position 300-2, and the calculated stay index is set as a threshold T2 (= 5). (Step S509). In order to satisfy the relationship of stay index ≧ T2, the mobile terminal 100 connects to the wireless access point 101 (step S510), and starts downloading content (step S511).

  In the description of the present embodiment, Equation 1 is exemplified as a method for calculating the stay index, but the present invention is not limited to this. Further, although only the route error is used in the calculation method, it is possible to use the moving speed of the mobile terminal 100 in addition to the route error.

  This will be specifically described using Equation 1. When the speed of the mobile terminal 100 is low, it is expected to stay in the service area 102 for a long time. Therefore, the constants A and B of Equation 1 are set large, and when the speed is fast, the constants A and B of Equation 1 are set. Set smaller. That is, the constants A and B in Equation 1 are redefined as a function with the moving speed as a variable. The stay index in this case is calculated from the speed of the mobile terminal 100 and the route error.

  FIG. 4 shows an example in which content download is not started even when the mobile terminal 100 is in the service area 102. According to FIG. 4, the mobile terminal 100 enters the service area 102 at the terminal location 400-1 and exits from the service area at the terminal location 400-2, and enters the service area 102 at the terminal location 400-3. It is described that the position is changed to the moving direction 403 at the position 400-4 and the terminal area 400-5 leaves the service area.

  Here, the method of calculating the stay index uses Equation 1, and the constants A and B and the threshold values T1 and T2 are the values used in the description of FIG.

First, the case of the terminal position 400-1 will be described. The path error θ ₀ (401 in FIG. 4) at the terminal position 400-1 is set to 60 degrees. Since the route error θ ₀ (= 60 degrees)> threshold value T1 (= 45 degrees), the stay index is calculated (step S503). When the stay index is calculated using the first term of Equation 1, the stay index “1” is obtained. The stay index is stored in the storage unit 204 (step S504). Since the mobile terminal 100 goes out of the service area 102 at the terminal position 400-2 (step S505), the mobile terminal 100 ends without downloading the content.

Next, the case of the terminal position 400-3 will be described. The path error θ ₀ (402 in FIG. 4) at the terminal position 400-3 is set to 50 degrees, and the path error φ ₁ (404 in FIG. 4) before the change of the moving direction at the terminal position 400-4 is set to 70 degrees. The subsequent path error θ ₁ (405 in FIG. 4) is set to 135 degrees.

First, upon entering the service area 102 in the terminal position 400-3, and compares the path error theta ₀ and the threshold T1 (step S502). Since the route error θ ₀ (= 50 degrees)> threshold value T1 (= 45 degrees), the stay index is calculated (S503). When the stay index is calculated using the first term of Equation 1, the stay index “2” is obtained. This stay index is stored in the storage unit 204 (step S504).

Next, a case where the movement direction is changed at the terminal position 400-4 will be described. A stay index is calculated from the path error φ ₁ (= 70 degrees) before the change of the moving direction and the path error θ ₁ (= 135 degrees) after the change (step S508). When the stay index is calculated using the second term of Equation 1, the stay index “−1” is obtained.

  Then, the previous stay index “2” stored in the storage unit 204 is summed up to calculate “1” as the stay index at the terminal position 400-4, and the calculated stay index is set as a threshold T2 (= 5). Compare (step S509). Since the relationship of stay index ≧ T2 is not satisfied, the content download is not started. Since the mobile terminal 100 goes out of the service area 102 at the terminal position 400-5, the processing ends without executing the download of the content.

  As described in the above-described embodiment, whether or not the mobile terminal 100 and the wireless access point 101 can be connected is determined by comparing the route error, the stay index, and the threshold values T1 and T2. In the above description, a case where fixed values are used as the threshold values T1 and T2 is shown, but the present invention is not limited to this.

  For example, the threshold value T1 and the threshold value T2 can be made variable according to the size of the content to be downloaded. When the content size is small, since the time required for downloading the content is short, the threshold T1 is increased and the threshold T2 is decreased. In this case, even if the route error is large or the stay indicator is small, the download can be started by connecting to the wireless access point 101.

  Conversely, when the content size is large, the content download time becomes long, so the threshold T1 is decreased and the threshold T2 is increased. In this case, the download is not started unless the route error is small or the stay indicator is large.

(Effects of the first embodiment)

  According to the first embodiment, based on the moving direction of the mobile terminal 100, the time for staying in the service area of the wireless access point 101 is predicted. Therefore, when staying in the service area for a short period of time such that content download is not completed, unnecessary connection to the wireless access point is prevented and power consumption of the mobile terminal 100 is reduced. It is possible.

  Also, by predicting the time to stay in the service area of the wireless access point 101 based on the moving direction of the mobile terminal 100, and controlling to connect to the wireless access point only when a stay of a certain time or more is expected, Since connections that do not complete the download of content can be eliminated, it is possible to reduce the influence on communication of other mobile terminals and efficiently use shared resources and effectively use radio resources.

(Second Embodiment)
Next, a second embodiment of the present invention will be described in detail with reference to the drawings.

  Referring to FIG. 6, in the second embodiment, a server 603 that performs processing for determining whether to download content by connecting to the wireless access point 101 is connected to the mobile terminal 100 via the network 610. Connected.

  The server 600 includes a connection determination unit 202, a stay index calculation unit 203, a storage unit 204, a connection determination unit 602 corresponding to the error calculation unit 205, a stay index calculation unit 603, and a storage of the mobile terminal 100 according to the first embodiment. Unit 604 and error calculation unit 605, and further includes a terminal communication processing unit 601 that communicates with mobile terminal 100 via network 610.

  The error detection unit 605 calculates a path error with an ideal path from the moving direction and position information of the mobile terminal 100 passed from the mobile terminal 100 and the position information of the wireless access point 101.

  The location information of the wireless access point 101 is notified from the mobile terminal 100 via the network 610, or the location information of the wireless access point 101 is stored in the server 600 in advance to determine the method, etc. Can be obtained using.

  Since the functions of the other components of the server 600 are the same as the corresponding components of the mobile terminal 100 in the first embodiment, description thereof will be omitted.

  The mobile terminal 100 notifies the server 600 of location information and movement information of the mobile terminal 100 and receives a connection request to the wireless access point 101, and a wireless access point according to an instruction from the server 600. A data communication control unit 211 that controls connection to the terminal 101 is provided. Other components, that is, the communication processing unit 200, the data reception processing unit 201, the sensor 206, and the low-speed communication unit 207 are the same as those in the first embodiment.

(Operation of Second Embodiment)
Next, the overall operation of the present embodiment will be described in detail with reference to FIG. Mobile terminal 100 detects radio waves from wireless access point 101 and determines whether or not service area 102 has been entered.

  When entering the service area 102, the mobile terminal 100 detects the moving direction and position with the sensor 206. Then, the server communication processing unit 212 transmits the detected moving direction and position information to the server 600 via the network 610 by the low speed communication unit 207.

  When the terminal communication processing unit 601 receives the information on the moving direction and the position, the server 600 performs a process for determining whether to connect to the wireless access point 101 with the connection determining unit 602. Since the determination process of whether to connect in the server 600 and the calculation process of the stay index are the same as those in the first embodiment, the description thereof is omitted.

  The mobile terminal 100 detects the moving direction by the sensor 206 every time the moving direction is changed, and the server communication processing unit 212 transmits the detected moving direction information to the server 600 via the network 610 through the low-speed communication unit 207. Send.

  When the server 600 determines to connect to the wireless access point 101, it notifies the mobile terminal 100 of a connection request to the wireless access point 101 via the terminal communication processing unit 601.

  The server communication processing unit 212 of the mobile terminal 100 that has received the connection request to the wireless access point 101 transmits a connection request to the wireless access point 101 to the communication processing unit 200, and the data reception processing unit 201 receives the content server 105. Download content from.

  The connection determination process in the server 600 can be performed on a plurality of mobile terminals 100. The server 600 stores and manages the stay index for each mobile terminal in the storage unit 604 that manages the stay index. For example, a stay indicator is managed for each mobile terminal using an identifier that can uniquely identify the mobile terminal 100.

  As the low-speed communication unit 207, for example, a communication method such as a cellular method used in a mobile phone can be used. In this case, a mobile phone network can be used as the network 610.

(Effects of the second embodiment)
Similar to the first embodiment, it is possible to prevent the occurrence of useless communication, reduce the power consumption of the mobile terminal 100, and influence the communication of other mobile terminals. It is possible to use less shared resources efficiently and effectively use radio resources.

Here, the hardware configuration of the mobile terminal 100 will be briefly described. FIG. 7 is a block diagram illustrating a hardware configuration example of the mobile terminal 100 according to the present embodiment.

  Referring to FIG. 7, the mobile terminal 100 can be realized by a hardware configuration similar to a general computer device, and includes a memory such as a CPU (Central Processing Unit) 701, a RAM (Random Access Memory), A main storage unit 702 used for a data work area and a temporary data save area, a communication unit 703 (corresponding to the communication processing unit 200) that transmits and receives data via a network, an input device 705, an output device 706, and a storage device 707 And an input / output interface unit 704 that transmits and receives data, and a system bus 708 that interconnects the above-described components. The storage device 707 is realized by, for example, a hard disk device including a non-volatile memory such as a ROM (Read Only Memory), a magnetic disk, and a semiconductor memory.

  The mobile terminal 100 according to the present embodiment, of course, implements its operation in hardware by mounting circuit components that are hardware components such as LSI (Large Scale Integration) incorporating a program. A program that provides functions such as the data reception processing unit 201, the connection determination unit 202, the latent index calculation unit 203, and the error detection unit 205 is stored in the storage device 707, and the program is loaded into the main storage unit 702. It can also be realized by software by being executed by the CPU 701.

  Note that the server 600 in the second embodiment also has the same configuration as the hardware configuration of the mobile terminal 100 shown in FIG.

  Although the present invention has been described with reference to the preferred embodiments and examples, the present invention is not necessarily limited to the above-described embodiments and examples, and various modifications can be made within the scope of the technical idea. Can be implemented.

  This application claims the priority on the basis of Japanese application Japanese Patent Application No. 2009-070780 for which it applied on March 23, 2009, and takes in those the indications of all here.

Claims (30)

Means for detecting the moving direction of the mobile terminal;
Detecting means for detecting a route error with an ideal route in a service area of a wireless access point that performs wireless communication based on the detected moving direction;
The path error is compared with a first threshold set in advance according to a minimum stay time required in a service area of a wireless access point that performs wireless communication, and based on a comparison result, the connection error to the wireless access point is compared. A mobile terminal comprising: a connection determination unit that determines whether or not it is possible. The connection determination means includes
When the route error is smaller than a preset first threshold, it is determined that a minimum stay time required in the service area is obtained, and a connection to the wireless access point is determined. The mobile terminal according to claim 1. When the route error is larger than a preset first threshold value, it comprises a stay indicator calculating means for calculating a stay indicator indicating a time ratio of staying in the service area based on the route error,
The connection determination means is
When the stay indicator is larger than a preset second threshold, it is determined that a minimum stay time required in the service area is obtained, and a connection to the wireless access point is determined. The mobile terminal according to claim 2. Storage means for storing the stay indicator;
The stay index calculating means includes:
Each time the moving direction changes, the stay indicator is calculated based on the route error and stored in the storage unit, and a plurality of stay indicators stored in the storage unit are added together,
The connection determination means includes
4. The mobile terminal according to claim 3, wherein the connection to the wireless access point is determined when the total stay indicator is larger than the second threshold value. Means for detecting the moving speed of the mobile terminal;
The mobile terminal according to claim 3 or 4, wherein the stay index calculating means calculates the stay index based on the moving speed in addition to the route error.   The mobile terminal according to any one of claims 2 to 5, wherein the first and second threshold values are set according to a size of content to be downloaded by connecting to the wireless access point. .   The mobile unit according to claim 1, wherein an ideal route to the wireless access point is a straight route toward the wireless access point in a service area of the wireless access point. Terminal. Means for communicating with a mobile terminal for wireless communication with a wireless access point;
Detection means for detecting a path error with an ideal path in a service area of a wireless access point that performs wireless communication based on the moving direction of the mobile terminal notified from the mobile terminal;
The path error is compared with a first threshold set in advance according to a minimum stay time required in a service area of a wireless access point that performs wireless communication, and based on a comparison result, the connection error to the wireless access point is compared. A server comprising: a connection determination unit that determines whether or not permission is permitted. The connection determination means includes
When the route error is smaller than a preset first threshold, it is determined that a minimum stay time required in the service area is obtained, and a connection to the wireless access point is determined. The server according to claim 8. When the route error is larger than a preset first threshold value, it comprises a stay indicator calculating means for calculating a stay indicator indicating a time ratio of staying in the service area based on the route error,
The connection determination means is
When the stay indicator is larger than a preset second threshold, it is determined that a minimum stay time required in the service area is obtained, and a connection to the wireless access point is determined. The server according to claim 9. Storage means for storing the stay indicator;
The stay index calculating means includes:
Each time the moving direction changes, the stay indicator is calculated based on the route error and stored in the storage unit, and a plurality of stay indicators stored in the storage unit are added together,
The connection determination means includes
11. The server according to claim 10, wherein the connection to the wireless access point is determined when the total stay indicator is larger than the second threshold.   The said stay index calculation means calculates the said stay index based on the said moving speed of the said mobile terminal notified from the said mobile terminal in addition to the said path | route error. Server described in.   The said 1st and 2nd threshold value is set according to the magnitude | size of the content which connects with the said wireless access point and the said mobile terminal downloads, The said in any one of Claim 9-12 The listed server.   14. The server according to claim 8, wherein an ideal route for the wireless access point is a straight route toward the wireless access point in a service area of the wireless access point. A connection control method for controlling connection of a mobile terminal to a wireless access point,
The mobile terminal is
Detect the moving direction of the mobile terminal,
Based on the detected moving direction, a path error with an ideal path in a service area of a wireless access point that performs wireless communication is detected,
The path error is compared with a first threshold set in advance according to a minimum stay time required in a service area of a wireless access point that performs wireless communication, and based on a comparison result, the connection error to the wireless access point is compared. A connection control method characterized by determining availability. In the connection determination step,
When the route error is smaller than a preset first threshold, it is determined that a minimum stay time required in the service area is obtained, and a connection to the wireless access point is determined. The connection control method according to claim 15. The mobile terminal is
When the route error is larger than a preset first threshold value, the method includes a step of calculating a stay index indicating a time ratio of staying in the service area based on the route error,
In the connection determination step,
When the stay indicator is larger than a preset second threshold, it is determined that a minimum stay time required in the service area is obtained, and a connection to the wireless access point is determined. The connection control method according to claim 16. In the stay index calculation step,
Each time the moving direction changes, the stay indicator is calculated based on the route error and stored in the storage means, and a plurality of stay indicators stored in the storage means are added together,
In the connection determination step,
The connection control method according to claim 17, wherein the connection to the wireless access point is determined when the summed stay indicator is larger than the second threshold. The mobile terminal is
Detecting a moving speed of the mobile terminal;
The connection control method according to claim 17 or 18, wherein, in the stay index calculation step, the stay index is calculated based on the moving speed in addition to the route error.   The control method according to any one of claims 16 to 19, wherein the first and second threshold values are set according to a size of content downloaded by connecting to the wireless access point.   The connection control according to any one of claims 15 to 20, wherein an ideal route for the wireless access point is a straight route toward the wireless access point in a service area of the wireless access point. Method. A connection control method for controlling connection of a mobile terminal to a wireless access point,
A server communicating with the mobile terminal is
Based on the moving direction of the mobile terminal notified from the mobile terminal, detecting a path error with an ideal path in a service area of a wireless access point that performs wireless communication,
The path error is compared with a first threshold set in advance according to a minimum stay time required in a service area of a wireless access point that performs wireless communication, and based on a comparison result, the connection error to the wireless access point is compared. A connection control method characterized by determining availability. In the connection determination step,
When the route error is smaller than a preset first threshold, it is determined that a minimum stay time required in the service area is obtained, and a connection to the wireless access point is determined. The connection control method according to claim 22. The server is
When the route error is larger than a preset first threshold value, the method includes a step of calculating a stay index indicating a time ratio of staying in the service area based on the route error,
In the connection determination step,
When the stay indicator is larger than a preset second threshold, it is determined that a minimum stay time required in the service area is obtained, and a connection to the wireless access point is determined. The connection control method according to claim 23. In the stay index calculation step,
Each time the moving direction changes, the stay indicator is calculated based on the route error and stored in the storage means, and a plurality of stay indicators stored in the storage means are added together,
In the connection determination step,
25. The connection control method according to claim 24, wherein a connection to the wireless access point is determined when the summed stay indicator is larger than the second threshold value.   26. The stay indicator is calculated based on the moving speed of the mobile terminal notified from the mobile terminal in addition to the route error in the stay indicator calculating step. The connection control method described in 1.   The said 1st and 2nd threshold value is set according to the magnitude | size of the content which the said mobile terminal downloads by connecting to the said wireless access point, The any one of Claim 23-26 characterized by the above-mentioned. The connection control method described.   The connection control according to any one of claims 22 to 27, wherein an ideal route to the wireless access point is a straight route toward the wireless access point in a service area of the wireless access point. Method. A connection control program for controlling connection of a mobile terminal to a wireless access point,
The mobile terminal;
Processing to detect the moving direction of the mobile terminal;
A process for detecting a path error with an ideal path in a service area of a wireless access point that performs wireless communication based on the detected moving direction;
The path error is compared with a first threshold set in advance according to a minimum stay time required in a service area of a wireless access point that performs wireless communication, and based on a comparison result, the connection error to the wireless access point is compared. A connection control program characterized by causing execution of a process for determining availability. A connection control program for controlling connection of a mobile terminal to a wireless access point,
A server communicating with the mobile terminal;
Based on the moving direction of the mobile terminal notified from the mobile terminal, a process of detecting a path error with an ideal path in a service area of a wireless access point that performs wireless communication;
The path error is compared with a first threshold set in advance according to a minimum stay time required in a service area of a wireless access point that performs wireless communication, and based on a comparison result, the connection error to the wireless access point is compared. A connection control program characterized by causing execution of a process for determining availability.

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