KR101260261B1 - Method and Apparatus for creating and providing reference information for accessing a wireless network and utilizing said information - Google Patents

Abstract

According to the present invention, a method for providing reference information for accessing a wireless data network, for example, a Wi-Fi wireless LAN network, includes information on access point identification information and information about a bandwidth used from signal strength and data reception of an access point. Upon receiving the access point characteristic information report, the at least one statistical table which is classified according to the classification condition is selected based on the report of the access point characteristic information, and the access point characteristic information is reflected in the selected one or more statistical tables. . Thereafter, based on the access point reference information request in which the access point identification information from the mobile communication terminal is described, one or more statistical tables for the described access point are specified among the previously classified statistics tables, and one or more statistics tables are specified from the specified statistical table. After calculating a reference value for the representative signal strength section, for example, an expected bandwidth, the reference value is constructed in association with the corresponding access point and provided to the mobile communication terminal.

Description

Method and Apparatus for creating and providing reference information for accessing a wireless network and utilizing said information}

The present invention is to provide information to a mobile communication terminal by configuring information on access points (APs) of a wireless data network, for example, a Wi-Fi network, and to provide the selected information to the mobile communication terminal. It is about using.

As mobile communication network develops, users can receive various information and contents that they need regardless of place using not only mobile phones but also smart phones, tablet computers (hereinafter referred to as “mobile communication terminals”). It became possible.

Users usually check whether a high-speed wireless data network, e.g., Wi-Fi wireless network, can be accessed in case of information or content with a large amount of data, and if possible, access and use the mobile phone. A data service is used by using a communication network, for example, a CDMA2000 or W-CDMA mobile telephone communication network. The use of such a network is largely due to a communication environment in which a high-speed wireless data network has limited service areas in which geographically dispersed areas are provided, while providing a data service without incurring additional burden on users.

Therefore, if a user cannot use a high-speed wireless data network in a space frequently used by the user, this is soon expressed as a complaint about a mobile communication provider. For the mobile communication provider, it is advantageous to induce the data service to a high-speed wireless communication network if possible, since the quality of the essential service called a voice call providing service decreases when the load of the data service using the mobile communication network increases.

In response to user reactions and conditions on the communication service, the mobile communication provider may select access points (APs) of high-speed wireless data networks, for example, Wi-Fi wireless LAN networks, in places where users are mainly concentrated. In this case, as shown in FIG. 1A, even in the same mobile communication provider, each service area of the Wi-Fi wireless LAN network may be partially overlapped.

When an arbitrary user is in the overlapping service area 10 illustrated in FIG. 1A, the mobile communication terminal 1 that is carrying it usually selects one connection point of a high-speed wireless data network and remains connected to the communication network. As a method of selecting one access point, the mobile communication terminal sets service identification information (SSID) and reception signal strength of access points for which a wireless data network signal is received in the overlapping service area 10. List on the screen, and the user selects one from the displayed list, the mobile communication terminal attempts to connect to the access point corresponding to the selected item.

By the way, the user's usual method of selecting is to select the item with the highest received signal strength from the displayed list. However, this choice does not guarantee the good quality you expect (for example, allocation of wide bandwidth (BW: Bandwidth)). This is because, even when the received signal has the highest intensity, when many users connected through the access point are using the data service, or when the network state at the rear end of the access point is not good, as illustrated in FIG. Vs. actual bandwidth used ”may not have an ideal characteristic 11a and may have a saturated characteristic 11b. In this state, although the signal strength is high, the desired data rate may not be provided when the actual data service is used after the access point is connected.

Therefore, in the present connection point selection method, the probability of obtaining an optimal result in connection point selection is not high from the viewpoint of actual data service usage.

An object of the present invention is to provide a method and apparatus for configuring and providing reference information as information on each access point so that the mobile communication terminal can make the best access point selection.

Another object of the present invention is to provide a method and apparatus for allowing a mobile communication terminal to select an access point capable of providing a probabilistic high quality data service based on statistical data.

It is still another object of the present invention to provide a method and apparatus for improving the accuracy of reference information for an access point by classifying and collecting statistical data according to conditions in which data service usage behaviors change.

The object of the present invention is not limited to the object explicitly stated above, and of course includes the purpose of achieving an effect that can be derived from the specific and exemplary description of the present invention.

According to an aspect of the present invention, a method for providing reference information on an access point of a wireless data network includes information on signal strength of an access point, information on usage bandwidth measured from data reception, and access point identification information. Upon receiving the access point characteristic information report, selecting one or more statistical tables from among the statistical tables previously classified according to the classification condition based on the report of the access point characteristic information, and reflecting the access point characteristic information to the selected one or more statistical tables; Specifying one or more statistical tables for the at least one access point from among the statistical tables previously classified, based on the access point reference information request in which the access point identification information from the mobile communication terminal is described for the at least one access point. From the specified statistics table to one or more representative signal strength intervals Calculating a reference value, and constructing and transmitting the calculated one or more reference values to each of the corresponding access points described in the access point reference information request to the mobile communication terminal. .

In one embodiment according to the present invention, the access point characteristic information further includes information on the signal strength of the access point and the unique information for the terminal for transmitting the information on the measured use bandwidth, the access point reference information request Further includes unique information about the mobile communication terminal. The unique information is identification information that uniquely identifies the terminal. Alternatively, it may be model information for the terminal. In the present embodiment, the calculating step may be performed on the at least one access point based on the access point reference information request in statistical tables constructed for the unique information of the mobile communication terminal included in the access point reference information request. Specifying a statistical table, and additionally calculating a reference value for the one or more representative signal strength sections from the specified statistical table, and transmitting the reference table, wherein the additional calculated reference value is described for each of the at least one connection point. Additional information is configured and transmitted further. Also, in the present embodiment, the calculating step may specify one or more statistical tables for the at least one access point based on the access point reference information request among the statistical tables that have been previously classified, and the one from the specified statistical table. Calculating at least one first reference value for the representative signal strength interval and based on the access point reference information request in statistical tables constructed for unique information of the mobile communication terminal included in the access point reference information request; Specifying a statistical table for the access point of and calculating a second reference value for the one or more representative signal strength sections from the specified statistical table, and respectively applying the first reference value and the second reference value for the same signal strength section to each other; Calculating the reference value by multiplying and adding the weights It may be made, including. In the second step, the reference value may be calculated by assigning a weight to the second reference value to be greater than a weight to the first reference value.

In one embodiment according to the present invention, the reflecting includes listing information on the bandwidth used and the signal strength in the access point characteristic information in the one or more selected statistical tables.

In one embodiment according to the present invention, the pre-categorized statistical tables are classified by at least weekday or non-working days, and by time zone, wherein the time zone is divided into one day so that at least a working time zone, working time zone, and leaving time zone are separated from each other. It can be each time zone of.

In one embodiment according to the present invention, the calculating step, in calculating the reference value from the specified statistical table, for a plurality of time intervals for the elements belonging to the representative signal strength interval, described in the specified statistical table In other words, the more the elements of the latest time period are reflected in the reference value with a greater specific gravity. In the present embodiment, if the number of elements belonging to the latest time period among the divided time periods is large, the specific gravity for the time period becomes large, and if small, the specific gravity for the time period may be adjusted in such a manner as to be small.

In one embodiment according to the present invention, the calculating step is a step of determining an analysis range for the elements in the specified statistical table belonging to the representative signal strength interval, and is obtained from the elements within the predetermined analysis range Calculating the reference value as any one of a minimum value, a maximum value, a median value, and a middle value of a high rank value when divided into ranks of a certain size, and an average value. In the present exemplary embodiment, the representative signal strength section may be determined by adjusting a width such that the number of elements registered in the corresponding section within a predetermined time is greater than or equal to a predetermined number. In addition, in the first step, the analysis range may be determined by excluding an element having a value outside a predetermined standard from the distribution of elements in the specified statistical table, which belongs to the representative signal intensity section.

In one embodiment according to the present invention, the calculating may include a step 1 of searching for a connection point database by searching a connection point database for the connection point included in the connection point reference information request, and one or more statistical tables of the found adjacent connection points. Specifying based on the access point request information, and calculating a reference value for one or more representative signal strength sections from the specified statistical table, wherein the transmitting comprises calculating the searched neighboring access points. One or more reference values are added to the configured reference information together with identification information of the corresponding neighboring access point and transmitted to the mobile communication terminal. In the present embodiment, the first step excludes the connection point described in the connection point reference information request, which is not retrieved from the connection point database, and finds a neighboring connection point based on the remaining connection points.

In one embodiment according to the present invention, the step of calculating, in selecting the one or more representative signal strength section, finds a section in which the statistical elements recorded in the specified statistical table is relatively concentrated and variably selected .

In another embodiment according to the present invention, the step of calculating, in selecting the one or more representative signal strength interval, the listed time of the statistical elements recorded in the specified statistical table within a certain time, for example Find and select a section with a relatively concentrated distribution of recent statistical elements within 24 hours or a week.

In one embodiment according to the present invention, the transmitting step confirms the comparison amount under the same signal strength condition based on each reference value calculated from the one or more representative signal strength intervals for the at least one connection point, and confirms the comparison amount. A list in which the at least one access point is arranged with the reference value associated therewith in order according to the size of the comparison amount is configured as the reference information and transmitted to the mobile communication terminal.

In one embodiment according to the invention, the reference value is a value for bandwidth or a quality score for bandwidth.

In one embodiment according to the present invention, the step of transmitting, for each of the one or more representative signal strength intervals further comprises a section representative value that allows the mobile communication terminal to know the section to configure the reference information do.

In an embodiment of the present disclosure, the calculating may include: finding a section in which a reference value supporting a specified bandwidth is obtained while dividing a plurality of signal strength sections into the specified statistical table by calculating a reference value of each partition section. The method may further include, wherein the transmitting further comprises a section representative value for allowing the mobile communication terminal to know the found section. In this embodiment, the designated bandwidth may be the required bandwidth described in the received access point reference information request.

In an embodiment according to the present invention, in the method, the step of calculating and transmitting the connection point characteristic information report is regarded as the connection point reference information request.

According to another aspect of the present invention, an apparatus for providing reference information on an access point of a wireless data network, when receiving the access point characteristic information, which describes the information on the bandwidth used and the access point identification information is received, the classification, A first processing unit configured to select one or more statistical tables from the statistical tables previously classified according to the conditions based on the received report of the connection point characteristic information, and reflect the connection point characteristic information in the selected one or more statistical tables; If there is a request for access point reference information in which the information on the access point and the access point identification information are described for at least one access point, one or more statistical tables of the at least one access point among the previously classified statistics tables are based on the access point reference information request. Specific, from that particular statistics table, one or more Calculating a reference value for a representative signal strength section, and constructing reference information for each corresponding connection point described in the connection point reference information request, using the calculated one or more reference values, the configured reference information being referred to the connection point reference And a second processing unit for transmitting the information request to the mobile communication terminal.

In one embodiment according to the present invention, the second processing unit is further configured to regard the connection point characteristic information report received by the first processing unit as the connection point reference information request.

According to an embodiment of the present invention, the access point characteristic information or the access point reference information request is received from a mobile communication terminal through a communication network and configured to be transmitted to the first processing unit and the second processing unit, respectively. And a network connection unit configured to receive a response to an access point reference information request from the second processing unit and to transmit the access point reference information request to the mobile communication terminal that has transmitted the access point reference information request.

According to another aspect of the present invention, a mobile communication terminal capable of accessing a plurality of heterogeneous networks including a wireless data network checks signal strength from an access point of the wireless data network, and checks the signal strength from the access point. Any one of the plurality of heterogeneous networks is formed by measuring access bandwidth when receiving data, and configuring access point characteristic information including information on the identified signal strength, information on the measured usage bandwidth, and identification information of the access point. An information reporting unit configured to report to a remote server through a communication network, and to transmit an access point reference information request including identification information of one or more access points belonging to the wireless data network, to the remote server, wherein the reference value for at least one access point is provided. When the reference information described in this one or more is received, each connection described in the reference information And a connection point selector configured to determine a priority based on each reference value of the connection point and the signal strength identified for the connection point, and request a connection to the connection point according to the priority.

In one embodiment according to the present invention, the information on the signal strength is information determined as an average value of the signal strength values checked a plurality of times.

In one embodiment according to the present invention, the information reporting unit is configured to measure the use bandwidth from a value obtained by dividing the amount of data received within a measurement time or from an average value of values obtained by dividing the amount of received data within a plurality of measurement times. do. In the present embodiment, the information reporting section is configured to variably set the length of the measurement time to measure the bandwidth used according to the type of request by the communication protocol for which the data reception is made.

In one embodiment according to the present invention, the information reporting unit further includes the unique information about the mobile communication terminal, for example, identification information for uniquely identifying the terminal or model information for the terminal. And the access point selector is further configured to include unique information about the mobile communication terminal in the access point reference information request.

In one embodiment according to the present invention, the information reporting unit further comprises information on the required bandwidth of the received data to measure the use bandwidth to configure the access point characteristic information.

In one embodiment according to the present invention, the information reporting unit further comprises information on the date and time of measurement of the use bandwidth to configure the access point characteristic information.

In one embodiment according to the present invention, the access point selector is configured to further include information on a required bandwidth required for a data service in the access point reference information request. In this embodiment, the required bandwidth is any one of a bandwidth required by any application, a bandwidth listed in association with the arbitrary application, and a bandwidth listed in association with a server requesting data by the arbitrary application. Can be identified from.

In one embodiment according to the present invention, the connection point selector, for each of the connection points, estimates a reference value for the signal strength confirmed for the connection point based on each reference value of the connection point, and estimated for each connection point. And determine the priority of each access point based on the magnitude of the reference value.

In one embodiment according to the present invention, if the signal strength of the connection point having the fastest list order in the reference information is the highest in the signal strength confirmed for each connection point, It may be further configured to request a connection.

In one embodiment according to the present invention, in determining the priority, the access point selector is based on each reference value for a predetermined signal strength section or the signal strength described in connection with the reference value in the reference information. Determined based on the interval.

In one embodiment according to the present invention, the connection point selecting unit specifies one or more statistical tables for the at least one connection point from among statistical tables previously classified according to classification conditions, based on the connection point reference information request, A reference value is calculated based on the signal strengths identified for the corresponding access point from the statistical table, and further generates reference information describing the calculated reference value for each of the at least one connection point. In the present embodiment, the connection point selector is configured to estimate estimated values obtained for the signal strengths identified for the connection points based on the respective reference values of the connection points described in the received reference information and to each reference value described in the generated reference information. And based on the access points in the reference information selected in the both reference information or the access points in the both reference information sequentially.

In one embodiment according to the present invention, the mobile communication terminal uses a value for bandwidth or a quality score for bandwidth as the reference value.

In one embodiment according to the present invention, the received reference information further includes information on the signal strength of each connection point described, wherein the connection point selection unit, the signal strength confirmed for each connection point in the reference information, the connection point For a predetermined allowable range lower than the information on the signal strength described in the reference information for the corresponding access point is configured to exclude from the priority determination.

In one embodiment according to the present invention, the signal strength confirmed for the corresponding access point is the signal strength confirmed through the search of the access point of the wireless data network before the reception of the reference information, or the wireless data after the reception of the reference information. The signal strength confirmed through the search of the connection point of the network.

In one embodiment according to the present invention, the connection point selecting unit, after the connection is made to the specific access point described in the received reference information, if the use bandwidth measured by the information reporting unit is lower than a given reference value, the specific access point Or reconfigure the access point reference information request including the access point identified through the search of the wireless data network and transmit it to the remote server. In the present embodiment, the connection point selector may belong to the plurality of heterogeneous networks if the connection point to be connected cannot be determined from the reference information received in response to the reconfigured transmission point reference information request or if the connection request fails. The mobile telephone network may be configured to request a connection for a data service.

In one embodiment according to the present invention, the access point selecting unit, after the connection is made to the specific access point described in the received reference information, if the use bandwidth measured by the information reporting unit is lower than a given reference value, the wireless data Check the signal strength of each current access point by searching the network, and for each access point described in the received reference information, determine the priority again based on each reference value of the access point and the current signal strength, and then again. It is further configured to request a connection for the corresponding access point according to the determined priority.

In one embodiment according to the present invention, the information reporting unit, if the usage bandwidth measured after the connection to a particular access point described in the received reference information is lower than a given reference value, the information on the usage bandwidth and the It is further configured to reconstruct the connection point characteristic information including the information on the signal strength to report to the remote server.

In one embodiment according to the present invention, the given reference value may be a predetermined limit bandwidth, an expected bandwidth obtained based on the signal strength identified for the specific access point, or a bandwidth required by a started application for data service. Can be.

In an embodiment of the present disclosure, the access point selector determines whether a current state of the mobile communication terminal corresponds to a preset condition, and transmits the access point reference information request when it corresponds to a preset condition. It is configured to. In the present embodiment, the set condition is the release of the lock state of the mobile communication terminal, every cycle according to the set search period, activation of a predetermined application, communication network connection request of an arbitrary application, connection of the wireless data network from an external server. At least one of an entry request and a case in which the data to be received requires a high bandwidth of a predetermined criterion or more. The access point selector may be configured to suppress an access point search function of the wireless data network of the operating system implemented in the mobile communication terminal when the current state does not correspond to the preset condition. When appropriate, the operation of activating the access point searching function may be further performed. Further, according to the activation of the access point search function, before the operating system performs the access point search function, an operation of disabling the history information, which is a previous access record to the wireless data network, may be further performed.

In one embodiment according to the present invention, the received reference information is configured to include first reference information and second reference information, each of which is distinguished from each other, and the connection point selector is configured in both reference information according to a set mode. One is selected first, and for each connection point described in the selected reference information, the priority is determined based on each reference value of the connection point and the signal strength identified for the connection point, and a connection request is made for the connection point according to the priority. It is further configured to.

According to yet another aspect of the present invention, a method for receiving reference information on an access point of a wireless data network from a remote server in a mobile communication terminal includes: identifying one or more access points identified from a search for an access point of the wireless data network. Constructing access point information including information, transmitting the configured access point information to the remote server to which address information for access is previously specified, and receiving reference information that is a response according to the transmitted access point information. Verifying the signal strength and at least a portion of the connection point described in the reference information based on the identified signal strength and one or more reference values described in the received reference information. Determining priorities and accessing them according to the determined priorities; A connection for comprises the step of requesting. The access point information may be access point characteristic information including usage bandwidth information measured relative to the signal strength of the access point, or may be a reference information request document describing access point identification information requesting reference information for access.

In one embodiment according to the present invention, all the above steps are performed while being connected to the wireless data network through any one connection point. The access point information may further include information on the use bandwidth measured at the time of receiving data from the access point with respect to the access point including the identification information.

In one embodiment according to the invention, all the above steps are carried out without being connected to the wireless data network.

In an embodiment of the present disclosure, the determining may include checking signal strength of the access point from previously stored access point search information, or searching the access point of the wireless data network after receiving the reference information. Check the signal strength.

At least one embodiment of the present invention described above, or described in detail in conjunction with the accompanying drawings below, provides a mobile communication terminal with a data rate that can be obtained in actual use instead of signal strength, which is generally measured inversely proportional to distance. By making it possible to select a connection point that is likely to be fast, the user's satisfaction is increased when using a high-speed wireless data network having a limited service area.

In addition, at an access point where the service quality is statistically saturated by concentrating the data service, the traffic may induce a data service request to an access point that is statistically smaller, thereby making it possible to equalize the traffic load on each access point to some extent. This increases the efficiency of using high-speed wireless data network resources and reduces network maintenance costs.

FIG. 1A illustrates an example in which service zones for allowing a mobile communication terminal to use a wireless LAN network such as a Wi-Fi network overlap.
FIG. 1B is an example of a characteristic curve showing that a transmission bandwidth of a data service may be saturated according to the usage environment of the AP, not proportional to the signal strength of the AP.
2 illustrates an example of a network configuration in which a method for configuring and providing information on wireless network access points according to an embodiment of the present invention is performed.
FIG. 3A illustrates an example of a configuration of a mobile communication terminal that reports usage characteristics of a wireless network access point and may use information about provided access points according to an embodiment of the present invention.
FIG. 3B illustrates the logical configuration of an adaptive AP selector that reports usage characteristics of a wireless network access point and also uses information about the provided access points, in accordance with an embodiment of the present invention, and its relationship to adjacent components. FIG. One,
4A, 4B and 4C illustrate examples of a method of measuring actual bandwidth used from received data, respectively, according to an embodiment of the present invention.
5A, 5B and 5C illustrate examples of formats of AP characteristic information for providing a remote server with a measured actual usage bandwidth according to embodiments of the present invention.
6 is a signal exchange flowchart of a method for configuring and providing information on wireless network access points according to an embodiment of the present invention.
FIG. 7A illustrates a structure of statistical tables created by describing bandwidth measured in a statistical table classified according to a condition based on received AP characteristic information, according to an embodiment of the present invention.
7B and 7C illustrate the structure of the personal statistical tables created by describing the measured bandwidth in the individual or group statistical table previously classified according to the conditions, based on the received AP characteristic information, according to an embodiment of the present invention. Will,
8A, 8B and 8C each illustrate an example of a format of a request in which identification information of discovered neighboring access points is described and transmitted to a remote server in order to obtain reference information about an AP according to embodiments of the present invention. Will,
9A and 9B illustrate an example in which a representative signal strength section is selected from a statistical table specified according to a request receiving condition for each AP in the AP reference information request and the expected bandwidth of the section is calculated according to an embodiment of the present invention. To show the
FIG. 9C illustrates that, for each AP in an AP reference information request, a representative signal strength section for calculating an expected bandwidth in a statistical table specified according to a request reception condition is variable according to distribution of statistical elements according to another embodiment of the present invention. Drawing to show an example of determining
10A and 10B illustrate examples of formats of AP reference information configured for providing to a mobile communication terminal, according to embodiments of the present invention.
FIG. 11 illustrates an example of estimating an expected bandwidth for an arbitrary reference signal strength based on an expected bandwidth obtained from each selected representative signal strength section according to an embodiment of the present invention.
12A illustrates an example of determining a peripheral connection point for one or more connection points using pre-registered position coordinate information according to an embodiment of the present invention.
FIG. 12B illustrates an example of a connection point database constructed in a tree form to find neighboring connection points for a given one or more connection points according to another embodiment of the present invention.
FIG. 13 is a diagram exemplarily illustrating that an AP having a high probability of providing a higher transmission bandwidth than an AP having a high signal strength may be selected according to embodiments of the present invention.
FIG. 14 illustrates an example of another format of a request in which identification information of discovered neighboring access points is described and transmitted to a remote server in order to obtain reference information about an AP, according to another embodiment of the present invention.
15A and 15B illustrate examples of a process of calculating a score for a corresponding AP from information described in received AP characteristic information, according to other embodiments of the present disclosure.
16A illustrates examples of functions that can be applied to calculate a score for each of the measurement bandwidth and the difference between the requested bandwidth and the measurement bandwidth, in accordance with an embodiment of the present invention;
16B illustrates one form of a function to apply in determining a correction ratio of a measurement bandwidth, corresponding to a difference between a requested bandwidth and a measurement bandwidth, according to an embodiment of the present invention;
FIG. 17 illustrates an example in which a representative signal strength section is selected from a statistical table specified according to a request receiving condition for each AP in the AP reference information request and the evaluation score of the section is calculated according to another embodiment of the present invention. It is a drawing to show,
FIG. 18 illustrates an example of a configuration of an access control server for constructing statistical information on AP characteristic information and creating and providing AP reference information based on the same according to an embodiment of the present invention.

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

FIG. 2 illustrates an example of a network configuration in which a method for configuring and providing reference information for accessing a wireless network according to an embodiment of the present invention and performing the method is performed. Two heterogeneous networks constructed as different communication infrastructures are illustrated in FIG. (Iii), for example, a mobile telephone communication network 20 and a wireless LAN network 2,2 _I for high-speed data service, and are connected to the mobile telephone communication network 20 and the wireless LAN network 2, for example. Receives information on access points (APs) of the wireless LAN network (actually the corresponding service zone (2 _I )) from a mobile communication terminal in a communication network, and configures and provides reference information about an appropriate connection access point to the mobile communication terminal therefrom. It includes an access control server 200. Hereinafter, for convenience of description, a 3G cellular network (hereinafter, abbreviated as “cellular network”) is taken as an example of the mobile telephone communication network 20, and a Wi-Fi wireless LAN network ( Hereinafter, abbreviated as "Wi-Fi network" will be described as an example of the high-speed wireless LAN (2, 2 _I ). Hereinafter, the principle and concept of the present invention will be described in detail by taking the Wi-Fi network, which is a high-speed wireless LAN network, as a data communication network used together with the mobile telephone communication network 20 for data service. Since the concept can be applied to other data communication networks other than the Wi-Fi network, for example, the Wibro network as it is, the scope of the rights according to the claims cannot be excluded due to the difference of the data communication networks to be applied.

The mobile communication terminal providing information on access points to the access control server 200 and requesting and receiving access point reference information when necessary has the configuration as illustrated in FIG. 3A.

The mobile communication terminals 300P and 300R illustrated in FIG. 3A have a cellular modem 31a (RF signal processing) that modulates or demodulates a signal according to a specified scheme of the cellular network 20 to transmit and receive a signal to and from the corresponding communication network. And a cellular codec 31b that encodes data or decodes encoded data according to a communication protocol adopted by the cellular network 20, and the Wi-Fi. A Wi-Fi modem 32a (a component including an RF signal processing module) which modulates or demodulates a signal according to a designated method of the network 2, and transmits and receives a signal to and from the corresponding communication network, and the Wi-Fi network 2 Wi-Fi codec 32b that encodes data or decodes an encoded data frame according to the communication protocol adopted in the present invention, a display panel 35 for displaying images, characters, and the like, and arbitrary data includes the display panel 35. Visually A keypad including a display driver 34 for driving the display panel 35, a touch sensor 36a attached to the front of the display panel 35, and a key and / or a button. 36b), an input control unit 36 for detecting a user input and / or selection on the touch sensor 36a and the keypad 36b and outputting corresponding input information, and input information from the input control unit 36. In order to perform an operation according to the above, the display driving unit (10) may be used to appropriately transmit or receive data from or to the corresponding component among the components, and to display a UI screen for selecting a result or a desired operation of the user. A main control unit 30 for controlling 34, and a memory unit 37 for providing a data storage space necessary for an operation of the main control unit 30 or a process executed by the main control unit 30, and the like.

The main control unit 30 executes command codes such as firmware to drive hardware resources of the mobile communication terminals 300P and 300R, and to perform appropriate signal and / or information exchange with the corresponding resources. An adaptive access point selector 310 (AAS Agent: Adaptive AP) which includes information on the current characteristics of the access points of the Wi-Fi network 2 and requests and receives access point reference information, if necessary. Selecting Agent) (hereinafter, abbreviated as “adaptive AP selector”).

The adaptive AP selector 310 is a process or an application implemented in the mobile communication terminals 300P and 300R and includes program codes executed based on the operating system 300a as illustrated in FIG. 3B. It may be provided in the form of software having a structure. In some cases, it may be provided in the form of middleware or a platform on which applications are based. Alternatively, by including a hardware configuration, the hardware may perform some of the functions described in detail below. Therefore, in various embodiments according to the present invention, the adaptive AP selector in which the configuration and operation method are described is not limited by the type of resource to be implemented.

As illustrated in FIG. 3B, the adaptive AP selector 310 obtains and provides characteristic information about access points and provides one AP based on AP reference information received from a remote server. And an AP selector 312 for selecting an AP to connect to the Wi-Fi network 2, wherein the adaptive AP selector 310 and the AP information reporter 311 and the AP selector 312 are selected. In some cases of operations described in detail below, the hardware components illustrated in FIG. 3A and the operating system 300a are provided through an appropriate application program interface (API) provided by the operating system 300a. The operation is performed by requesting specific functions (eg, input / output through a screen, communication with the outside based on a protocol, checking hardware status, and a timer) provided by each.

The configuration of the mobile communication terminals 300P and 300R illustrated in FIG. 3A is just one example for specifically and illustratively explaining an embodiment for aiding in understanding the concept and the subject matter of the present invention. Terminals embodying the concepts and themes may further include components of various functions not shown in FIG. 3A or may exclude some of the illustrated components.

When the mobile terminal 300P illustrated in FIGS. 3A and 3B is located in any one Wi-Fi zone 2 ₁ as illustrated in FIG. 2, it is allocated to a Wi-Fi signal band. The Wi-Fi modem 32a, which periodically transmits a probing packet for each of the 13 channels, for example, receives a response packet from the neighboring AP at this time. The RSSI (Received Signal Strength Indicator) is obtained from the response packet signal, and the channel information, service set identifier (SSID) and the address of the MAC (Media Access Control) layer of the AP are extracted. When the Wi-Fi modem 32a is in such a state, the operating system 300a selects one AP and requests an access to allocate an IP address and set it as a local address.

In this state, any application (hereinafter, abbreviated as “application”) 320 is executed on the basis of the operating system 300a so as to request a communication protocol for an external server, for example, FTP based. When the request, HTTP-based request, or RTSP / RTP-based request is transmitted and the corresponding data is received directly or through the adaptive AP selector 310, the AP information report unit 311 configures characteristic information on the current AP. It is provided to the access control server 200. This will be described in more detail.

First, the AP information reporting unit 311 receives a request by a communication protocol transmitted by the arbitrary network 320 to an arbitrary external server. The method for setting the request by the communication protocol sent by the arbitrary application 320 to be received by the AP information report unit 311 based on the same operating system includes a local communication socket through proxy setting. Communication method, a method of externally redirecting to the AP information reporter 311, or a method in which an arbitrary application inserts a local IP into a host field of a request based on a communication protocol. These methods are described in detail in the application No. 10-2011-0066981 filed on July 7, 2011, the applicant will be omitted here. When the AP information report unit 311 receives a request according to a communication protocol sent by the arbitrary application 320 through any one of the above-described methods, to transmit a request according to the communication protocol. Request the creation of a communication socket to the operating system (300a). This request is passed along with the request by the protocol or the address of the host field in that request. Since the mobile communication terminal 300P is currently in the Wi-Fi zone 2 ₁ , the Wi-Fi modem 32a can receive a physical signal and according to this state, the mobile communication terminal 300P receives the request for the communication socket generation request. The operating system 300a generates a communication socket by using a connection IP address assigned in the Wi-Fi network 2 as described above as a local address and a destination address of a request according to a communication protocol as a remote address. At that time, a session is established with the remote server.) The AP returns to the AP information reporting unit 311. Then, the AP information reporting unit 311 transmits the request according to the communication protocol previously received using the returned communication socket, and accordingly, the request according to the communication protocol is remoted through the Wi-Fi network 2. Is sent to the server.

If the user stops using the Wi-Fi network, even if the mobile communication terminal 300P is in the Wi-Fi zone, the operating system 300a still receives the access IP address from the cellular network 20. To keep things. In this case, even if a request for creation of a communication socket is not made, a communication socket for using the Wi-Fi network 2 is not generated. Therefore, the AP information report unit 311 may query the operating system 300a for current communication network connection information and request network connection information received through the inquiry before requesting creation of a communication socket. . The network connection information includes a connection IP address and a connection type (for example, 3G mobile telephone network, Wi-Fi wireless LAN network), etc. when connected to a communication network. It can be seen that the communication socket is for the Wi-Fi network (2).

If the communication socket 310a for the cellular network 20 is generated, the AP information reporting unit 311 acquires and reports AP characteristic information described below with respect to transmission and reception of data through the communication socket. Do not do it.

A communication socket 310b for the Wi-Fi network 2 is generated and a request according to the received communication protocol is transmitted through the communication socket 310b, and a response corresponding thereto is received through the corresponding communication socket 310b. Then, the AP information reporting unit 311 measures the actual bandwidth used, that is, the actual data transmission rate of the data according to the type of request by the communication protocol as follows.

If the request according to the previously transmitted communication protocol is a file download of a large capacity (for example, several MBytes or more) based on FTP or HTTP, which involves one-time transmission of a large amount of data, the response accordingly is the Wi-Fi When the operating system 300a reaches the operating system 300a in the form of data through a modem 32a and a Wi-Fi codec 32b, the operating system 300a grasps the corresponding session information of the data and corresponds to the communication socket corresponding to the session ( Data is pushed to 310b). When data is pushed to the communication socket 310b, the AP information reporting unit 311 recognizes this and confirms the time t41 at that time as illustrated in FIG. 4A. Recognition of the AP information reporting unit 311 is made from the occurrence of an event from the operating system 300a or through confirmation of a continuous communication socket.

After the first time t41 is confirmed, the AP information reporting unit 311, when the predetermined time Tint elapses, for example, a time t42 of 1 second or more elapses, the checked time point t41. Afterwards, the size (DS) of the data pushed in the corresponding communication socket 310b is checked. The data size DS thus obtained is divided by the reference time Tint (this value is the actual bandwidth of the data received so far, which is the actual transmission speed). It is stored as an element of characteristic information of the AP.

If the request according to the previously transmitted communication protocol is, for example, an HTTP-based streaming transmission involving repeated transmission of a relatively large capacity (eg, several hundred kBytes or more) of data, the response is received. The AP information report unit 311 sets a reference time Tint for measurement, for example, to several hundred milliseconds, and grasps the amount of data received per hour for several times for example for one second or more. The actual bandwidth can also be calculated by taking the average value over time. Figure 4b illustrates the process for this. In the example of FIG. 4B, the AP information reporting unit 311 calculates a real bandwidth (aBW) using the following equation (S420).

In the type of request under this protocol, the same reference time may not be used for every measurement. In this case, when the reference time for each measurement is called Tint _j and the amount of data received for each reference time Tint _j is DS _j , the actual bandwidth aBW is calculated according to the following formula.

That is, the actual bandwidth is calculated from the value obtained by dividing the amount of data received during the measurement time (sum of Tint _j ).

If the requirements of the previously transmitted communication protocol are, for example, RTSP / RTP (Realtime Streaming Protocol / Realtime Transport Protocol) based streaming transport involving periodic transmission of relatively small capacity (for example, tens of kBytes or less) data, In this case, since the response is distributed in a very short time unit and received in a burst, the unit time (time resolution) within the range supported by the operating system 300a is more than that while the data is being received. Difficult to shorten Therefore, in this case, the actual bandwidth is measured in the manner as illustrated in FIG. 4C. The AP information report unit 311 sets a reference time Tint for the measurement at this time, for example, several tens of millimeters ( milli) seconds. In this case, the actual bandwidth (aBW) is calculated using the following equation as illustrated in FIG. 4C (S430).

The above equations are presented to help understand the practical bandwidth measurement for this case, which means that the numerators of the equations are summed by obtaining their respective data sizes DS _k (k = 1,2,…, P). (As mentioned above, each DS _k can be difficult to measure or very error due to the time resolution provided), but only refers to the total amount of data received during the set reference time (Tint). That is, it means that the size of data received up to the point of time when the reference time has elapsed is applied.

In the above-described embodiment, although the first arrival time of the response data according to the request by the communication protocol to the communication socket is set as the starting points t41, t44 _k and t45 of the reference time Tint, the AP information report unit 311 After the acknowledgment that the response data has reached the communication socket indicates that the reference time (Tint) has elapsed from the last data position reached at that point as a starting point at any time while the data is arriving. The actual bandwidth used as described above may be calculated by checking the position of the last data.

In addition, in the above-described embodiment, the location of the data reached has been described in the communication socket, but this is only for understanding, and the memory (which is allocated and managed by the AP information report unit 311 from the communication socket) is described. It is, of course, possible to calculate the actual bandwidth based on the movement time and the position of each data in the space after moving to the storage space.

According to an embodiment of the present invention, when the operating system 300a generates an event for each of a push start of a data packet to a communication socket and a push point of the last data of the packet, the AP information reporting unit ( 311 may use the time interval of occurrence of each event instead of the reference time Tint. That is, it divides the length of a received packet by the interval at which an event occurs to calculate the actual bandwidth.

If the AP information reporting unit 311 calculates, or before calculating, the actual bandwidth used by any one of the above-described methods according to the type of request by the communication protocol, the operating system 300a determines that the operating system 300a performs the calculation. The Wi-Fi modem 32a reads the signal strength value, that is, the RSSI value, the service identification information (SSID), and the MAC address, through the provided API (r31). In one embodiment according to the present invention, while receiving data, which is a process of calculating the actual bandwidth, the signal strength value may be read several times and the average value may be determined as the signal strength value. The information thus obtained and the calculated actual bandwidth are used to configure the characteristic information for the current AP having the information elements as illustrated in FIG. 5A. In constructing the characteristic information, the information on the signal strength may be used as it is, but the signal strength value or the average value read out, but for the signal strength, there are several classes, for example, "very good", "good" It can also be specified as "normal", "bad", "very bad", or the like. The characteristic information illustrated in FIG. 5A adopts the MAC address of the AP as the unique identification information of the AP, but if the service identification information (SSID) is allocated in a manner that can distinguish the individual AP, the service identification information is replaced with the MAC address. Of course, it can be used as an element of the characteristic information. Instead of the calculated actual bandwidth, a parameter that can be calculated, for example, the reference time and the amount of received data during the reference time may be described as elements of the characteristic information.

In another embodiment according to the present invention, as illustrated in FIG. 5B, unique information of the mobile communication terminal 300P constituting the characteristic information, for example, identification information for uniquely identifying the terminal is also included. It may be included in the AP characteristic information. As the terminal identification information, other information may be used in addition to the telephone number 501 of the illustrated mobile telephone terminal. For example, if the user number described in the Universal Subscriber Identity Module (USIM) chip is allowed access, the number may be used. Information for use as terminal identification information is shared by the AP information reporting unit 311 by the adaptive AP selector 310 through an API provided by the operating system 300a, or the AP information report. The part 311 confirms and uses an API when needed.

In another embodiment according to the present invention, as illustrated in FIG. 5C, other unique information about the mobile communication terminal 300P constituting the characteristic information, for example, model information 511 of the corresponding terminal, is characterized by the AP characteristic. Information may be included. The model information to be described in the AP characteristic information, like the terminal identification information, is identified and used through the API provided by the operating system 300a.

In another embodiment according to the present invention, the above-mentioned real-time bandwidth may be measured by the arbitrary application 320 for data received by the application 320 and then provide the measured bandwidth to the AP information reporter 311. have. At this time, through the identifier of the process or the application set by the shared information, directly from the arbitrary app 320 or by the adaptive AP selector 310 to be mediated to the API information report unit 311 Delivered. When the measured bandwidth is received, the API information report unit 311 reads the signal strength value and the AP identification information previously checked for the AP that is currently connected, from the operating system 300a, and thus, for the current AP. Configure the characteristic information. The AP characteristic information configured as described above is provided to the access control server 200 according to the signal exchange flow diagram according to the exemplary embodiment of the present invention illustrated in FIG. 6, and then refer to the AP with respect to itself or another mobile communication terminal. Used as statistics to present information.

If the characteristic information on the AP currently connected in any Wi-Fi zone is configured as described above (S61), the AP information report unit 311 makes a request for the communication socket generated by the operating system 300a. Report the configured AP characteristic information to the access control server 200 through (S62). Access information about the destination of the AP characteristic information, for example, a URL, is preset in the adaptive AP selector 310 and shared by the AP information reporter 311 and the AP selector 312. The AP information reporting unit 311 may report the date and time at which the characteristic is measured in the AP characteristic information and report it to the access control server 200.

In one embodiment according to the present invention, the AP information reporting unit 311 also transmits the characteristic information on the AP configured by any one of the above-described methods to the AP selecting unit 312.

The access control server 200 is configured to report each AP characteristic information that is configured and reported from the mobile communication terminals equipped with the adaptive AP selector 310 according to several classification requirements. It is recorded as a statistical element in the corresponding characteristic statistical table in the public AP characteristic statistical table (S63). At this time, if the information on the actual bandwidth used consists of the measurement time and the data amount, the data amount is divided by the measurement time to obtain the actual bandwidth. Examples of the classification requirements may include time zones [working hours, morning and afternoon (or working hours), leaving hours, evenings, nights, etc.], days of the week, holidays, and the like. According to the embodiment illustrated in FIG. 5B, when the terminal identification information is included in the received AP characteristic information, the received characteristic information is recorded in the corresponding AP characteristic statistics table of the at least one public, and the corresponding terminal identification information is recorded. It is also recorded in the Personal AP Characteristics Statistics Table. According to the embodiment illustrated in FIG. 5C, when the model information of the terminal is included in the received AP characteristic information, the received characteristic information is recorded in the corresponding AP characteristic statistics table of the at least one public, and the corresponding terminal model is recorded. It is also recorded in the group AP characteristic statistics table provided for the information.

The term “statistics table” used in this specification for a set of statistical elements separated according to each classification requirement does not mean only a set of statistical elements existing as separate objects, for example, files. However, even if statistical elements corresponding to two or more classification conditions belong to the same object, the statistical elements are classified in one or more objects so that they can be distinguished from each other. It is also used to mean a group of individual statistical elements.

FIG. 7A illustrates an example of a public AP characteristic statistical table in which received AP characteristic information is described as a statistical element, according to an embodiment of the present invention. In the example of FIG. 7A, the characteristic information for the AP having ID1 of the example shown in FIG. 5A (in the drawing, the MAC address is described as “00-08-9F-C4-E5-6A”) is displayed on the time of work on Tuesday. For example, the statistics table of the Tuesday time zone matched from the classified AP characteristic statistics table of the public classified as reported at 7 am to 9 hours) or the measurement date and time described in the reported characteristic information of the AP belongs to the time zone of Tuesday. Shows an example recorded as one statistical element 711, that is, a measured value. As mentioned above, in the case of the embodiment of FIG. 5B, as illustrated in FIG. 7B, one of the characteristic statistical tables in which the classification condition is matched among the AP characteristic statistical tables 720 of the individual specified by the received terminal identification information is included. It is also recorded as the measured value 721. On the other hand, in the embodiment in which the AP selector 312 in the mobile communication terminal receives the characteristic information about the AP from the AP information reporter 311, the AP selector 312 also shows the AP characteristic statistics table as shown in FIG. 7B. And manage and list the characteristic information received from the AP information reporting unit 311 as one measurement value in the characteristic statistical table of the classification condition matched at the received time.

In the case of the embodiment of FIG. 5C, the access control server 200 records the measured value in the AP characteristic statistical table of the air illustrated in FIG. 7A, and in addition to the model information of the received terminal as illustrated in FIG. 7C. It is also listed as one measurement 731 in the characteristic statistical table to which the classification condition is matched among the group AP characteristic statistical tables 730 specified by.

In the above-described embodiments, when the signal strength element in the received characteristic information is lower than a predetermined threshold, or when it corresponds to the lowest level among the predetermined classes, for example, "very bad", the characteristic information is described. It may be ignored and not listed in the statistics table.

The access control server 200 which creates and manages the AP characteristic statistics table of the public or additionally creates and manages the AP characteristic statistics table of an individual or a group in the manner as described above, stores all the statistics tables in a database to access the AP from the mobile communication terminal. Upon receiving the request for the reference information, the AP reference information for the corresponding terminal is prepared and provided based on the database statistical tables. This will be described in detail below.

As illustrated in FIG. 2, the mobile communication terminal 300R having the configuration illustrated in FIGS. 3A and 3B can access the Wi-Fi network 2 within the cellular network 20. When the connection to the Wi-Fi network 2 is enabled by entering (p2) the service zone 2 ₁ , 2 ₂ , 2 ₃ with (2 _ov ), the operating system 300a has been previously connected. Check whether the AP is in the currently detected APs (AP1, AP2, AP3 forming Wi-Fi zones 2 ₁ , 2 ₂ , 2 ₃ respectively in the example of FIG. 2), and if not, the “Wi- Fi Available Event ”. The event at this time includes the signal strength and identification information of each AP for the currently detected AP.

In one embodiment according to the present invention, the adaptive AP selector 310 disables the search for the Wi-Fi network of the operating system 300a and enables the search function when necessary. You may ask. When necessary, every time period according to a search period in which the time length is changed and set according to the time, state or time zone, etc., when the screen lock state of the mobile communication terminal 300R is released, a network from an arbitrary application is started. When the connection request, the response according to the request by the communication protocol may be when the data to be received requires a high bandwidth or more than a certain standard, or when the entry request for Wi-Fi network entry from an external server. In this embodiment, when the illustrated required time point is reached, the adaptive AP selector 310 activates the Wi-Fi search of the operating system 300a so that the search result is the result of the “Wi-Fi available event”. The AP may be delivered to the AP selector 312 that has already registered the reception. The operating system 300a may directly access the corresponding AP without generating an event if the AP included in the previously accessed history information is included when the accessible APs are searched after the Wi-Fi network search. Accordingly, the adaptive AP selector 310 reads and stores the " AP access history information " from the operating system 300a in order to ensure the occurrence of an event, and then deletes the history information from the operating system 300a. You can also ask for In one embodiment according to the present invention, the adaptive AP selector 310 may notify the AP selector 312 of the request fact after a predetermined delay time after the request for activation of the Wi-Fi network search.

When the “Wi-Fi available event” occurs, the AP selecting unit 312 receives the event and reads identification information of each AP, which is information added to the event. In one embodiment according to the present invention, the signal strength from each AP may also be read and stored as AP discovery information in association with the corresponding AP. Instead of a method of generating an event, the AP selector 312 requests the operating system 300a when the request for notification of the Wi-Fi network search activation is received from the adaptive AP selector 310. Identification information (or signal strength from the AP) may be received for each AP. When identification information of each AP is confirmed, an AP reference information request form having a format as illustrated in FIG. 8A including these information is configured (S65) and transmitted to the access control server 200 (S66). According to another embodiment of the present invention, when the signal strength is also checked and stored as the AP discovery information, an AP reference information request document including identification information of one AP having the highest confirmed signal strength may be configured. have. Transmission to the access control server 200 is made through the communication socket 310c generated by the AP selecting unit 312 for the cellular network 20 by requesting the operating system 300a. The data transmitted at this time is coded by the cellular codec 31b, modulated by the cellular modem 31a, and then transmitted as a radio signal to a neighboring base station. In the embodiment according to the present invention, the AP reference information request form is added by adding terminal identification information 801 as illustrated in FIG. 8B, or the terminal model information 811 is added as illustrated in FIG. 8C. Reference information requests may also be constructed.

In one embodiment according to the present invention, the AP selecting unit 312, after configuring and transmitting the AP reference information request as described above, by activating the Wi-Fi search through the operating system 300a by surrounding APs The signal strengths of the signals may be checked again and stored as AP discovery information.

In the above-described embodiment, the server receiving the AP characteristic information report and the server receiving the AP reference information request are described as the single access control server 200. However, in another embodiment according to the present invention, as described below with respect to the configuration of the access control server 200 may be constructed as a plurality of servers having independent IP addresses. Therefore, in this case, the AP information reporting unit 311 and the AP selecting unit 312 store access information, for example, URLs, for the corresponding server to report or request information differently.

The access control server 200 receiving the AP reference information request through the cellular network 20 selects one or more signal strength sections for each AP included in the request, and a reference value for the section. For example, by identifying the expected transmission bandwidth (hereinafter, abbreviated as "expected bandwidth"), the AP reference information is configured in the following manner.

First, one from the list of APs included in the request is sequentially selected, and among the statistically databaseized statistical tables as illustrated in FIG. 7A for the selected AP, the date and time (time zone, day of the week, holiday, etc.) when the request was received. For example, if a received date and time, for example, is a Monday time zone, one AP characteristic statistics table of the public corresponding to the classification condition is specified. In the selected statistical table, the expected bandwidth is calculated based on the selected representative signal strength section. FIG. 9A illustrates an example of calculating an expected bandwidth for a selected representative signal strength section 910 _k from a specified statistical table. For convenience of understanding, each statistical element recorded in the statistical table, that is, a measured value (RSSI vs. This is a graph showing the actual bandwidth used. One or more, preferably two or more, representative signal strength sections may be selected, and predetermined sections may be uniformly selected for all APs. For example, three intervals having a width of 1, 3, or 5 dBm up and down, respectively, with a predetermined value of -70 dBm, -60 dBm, or -50 dBm as the center value 920 are selected for all APs described in the received request. Can be. In another embodiment according to the present invention, the representative signal strength section may be variably selected according to the distribution of statistical elements recorded in the corresponding statistical table. For example, as illustrated in FIG. 9C, arbitrary signal strength sections 910a and 910b in which the distribution of statistical elements are relatively concentrated are selected as representative signal strength sections. In addition, the width of the representative signal strength section may also vary according to the number of statistical elements belonging to the section. For example, if the number of elapsed time after listing in the corresponding interval is greater than the appropriate number, the width of the interval is narrower, and if it is smaller, the width of the interval is wider. Be part of the counting interval. In another embodiment according to the present invention, any signal intensity section recently listed, for example, a relatively concentrated distribution of statistical elements listed within one day or one week may be selected as the representative signal strength section. have. According to one embodiment of the present invention, when the information on the signal strength is given as a value of one of the predetermined grades when reporting the AP characteristic information, one or more, preferably two or more grades are It is selected as the representative signal strength section.

When representing the signal intensity range (910 _k, or 910a, 910b) are determined as described above, the AP selection unit 312 determines the analysis range by checking the variation range of the measurement value stored group belonging to the interval for each interval . The method of determining the analysis range of the actual bandwidth from the measured values may be a range of all the values in which the measured values are distributed, and in the distribution of the measured values, for example, 1.5σ (σ is the standard deviation of the measured values). It can also be a range of values excluding measured values outside of 2σ or 3σ. FIG. 9B illustrates only the first representative signal strength section 910 ₁ for the example of FIG. 9A. In the example of determining the analysis range, the analysis is performed by excluding some of the measured values 940 according to the latter method. An example of the range 930 is shown. When the analysis range 930 is determined, the expected bandwidth is calculated in the range (S67a). As a method of obtaining the expected bandwidth, the minimum value 931, the maximum value 932 of the determined analysis range 930 or the median value of the determined analysis range 930 may be taken. Alternatively, when the analysis range 930 is divided into ranks of a certain size, the median of the rank values having the greatest frequency may be taken, or an average value may be calculated.

The access control server 200, in the manner described above, for each AP described in the received AP reference information request, each representative selected from the public AP characteristic statistical table of the corresponding classification condition that is already databased After calculating all the expected bandwidths from the signal strength intervals according to the above-described method, AP reference information is described for each AP with the calculated expected bandwidths along with the representative value of the corresponding representative signal strength intervals (S67b). When the AP reference information created at this time is explicitly distinguished from the "AP reference information for personal or group" described later, it is called "general AP reference information"). The AP reference information created at this time may include the number 1001 for the described APs, as illustrated in FIG. 10A, and for each AP, the estimated bandwidth 1002 and the corresponding signal strength interval of the calculated APs. The representative value 1011 is included. As the representative value, as illustrated in FIG. 10A, a center value 920 designated for each corresponding representative signal strength section, or one value 1011, such as a median value, may be described. Representative signal strength interval values may be described instead. For example, an interval designation value of [-57 to -53 dBm] may be described instead of the representative value of -55 dBm. In addition, the representative value may be a value for designating any one of several classes classified for signal strength as described above. When using predetermined representative signal strength intervals or classes shared with the AP selection unit 312 of the mobile communication terminals 300P and 300R, the access control server 200 creates the AP reference information. In this case, the representative value of the representative signal strength section may not be included.

In one embodiment according to the present invention, when creating the AP reference information, if there are a plurality of APs, the AP reference information may be listed in order according to the calculated estimated bandwidth. When the same representative signal strength sections are applied to each AP, the description order of APs is determined according to the average value of the expected bandwidths or the expected bandwidth of the maximum representative signal strength section or the lowest representative signal strength section. According to an embodiment of the present invention, when the representative signal strength section is adaptively determined for each AP, as illustrated in FIG. 11, a set of the calculated expected bandwidth and the representative value of the corresponding signal strength section (set) ), The estimated bandwidths (pBWn, pBWm) for the specific signal strength point 1101, which are estimated for each AP, are determined in order of the APs. In the example of FIG. 11, "AP n" is described in the AP reference information before "AP m". As the specific signal strength point 1101, which is a reference point for the list order of APs, an approximate intermediate value of representative values of the selected representative signal strength section may be used. Although the example of FIG. 11 shows a linear estimation from two sets, the specific signal strength point is obtained from a second or more polynomial, or a logarithmic function, an exponential function, or a combination thereof depending on the number of sets. It can also be estimated.

In another embodiment according to the present invention, each calculated expected bandwidth may be scored and APs may be listed according to the score. As an example of scoring, a value by a function such as y = k x , y = k · log x , a difference with a constant reference bandwidth (BWref), or a ratio with respect to a predetermined reference bandwidth may be obtained.

In an embodiment in which the terminal reference information is included in the AP reference information request, the access control server 200 may represent the representative signal strength of each AP included in the AP reference information request in the aforementioned AP characteristic statistics table. In the same manner as the calculation method of the expected bandwidth of the interval, the expected bandwidth of the representative signal strength interval for each AP is also calculated from the personal AP characteristic statistics tables previously databased for the terminal in the manner illustrated in FIG. 7B. The AP reference information is then created as the estimated bandwidth, and the personal AP reference information is also constructed.

In an exemplary embodiment in which the terminal reference information is included in the AP reference information request, the access control server 200 is previously databased for terminals of the same model as the corresponding terminal in the manner illustrated in FIG. 7C. In addition to the general AP reference information, the group AP reference information is also configured by calculating the expected bandwidth of the representative signal strength section for each AP from the group AP characteristic statistical tables and then creating the AP reference information as described above as the estimated bandwidth. do.

In another embodiment according to the present invention, the access control server 200 is described above from the location information registered in the AP database already established for each AP, in addition to the APs described in the received AP reference information request. If it is confirmed that there are other APs adjacent to the existing APs, the AP bandwidth of each representative signal strength section is calculated for the other APs (APs not listed in the AP reference information request). Configure. The access control server 200 checks whether other APs are adjacent to at least one AP described in the received AP reference information request in the following manner.

The access control server 200 first searches an AP database of a binary search structure for APs AP1, AP2, and AP3 described in the received AP reference information request as illustrated in FIG. 12A. Each position coordinate information is found and the center coordinate is determined from the found position coordinates. In one embodiment according to the present invention, the central coordinate is determined by the coordinates of the center point 1201 of the two APs (AP2 and AP3 of FIG. 12A) located at the longest distance from each other. In addition, other coordinates may be determined that may be the approximate center of each AP. If one AP is listed in the received AP reference information request, the position coordinate of the AP becomes the central coordinate. When the central coordinate 1201 is determined, the access control server 200 searches for the already built AP database, and if there is another AP located within a predetermined radius LimR from the central coordinate 1201, It is determined as an adjacent AP. In the example of FIG. 12A, AP11 is determined to be an adjacent AP, and other AP12 and the like are not. If the designated radius (LimR) is shorter than the distance between any one of the APs described in the received AP reference information request and the determined central coordinate (1201), the distance from the central coordinate (1201) to the AP to a specified radius It is determined whether or not adjacent to.

In addition to a mobile communication service provider, an AP that allows access to a data network through a Wi-Fi method may be an AP (hereinafter, referred to as a “private AP”) that an individual personally installs in a home or an office. Such a private AP is difficult to be registered in the AP database built and managed in the access control server 200. However, the private AP may be received as described in the received AP reference information request. Therefore, the access control server 200 excludes the AP that is not searched from the built-in AP database from the reference AP for determining whether the AP. For example, it is the received reference AP information request the AP1, AP2, AP3, and AP _priv substrate and AP _priv is as in Figure 12a excluding the AP does not detect the AP database the access control server 200 Similarly, only the AP1, AP2, and AP3 are used to determine the central coordinate and find the adjacent AP therefrom. If only one AP not found in the AP database is listed in the received AP reference information request, the access control server 200 does not find the neighbor AP. For a location unregistered AP such as a private AP that is not retrieved from the AP database, it is excluded as a reference AP for determining whether or not to be adjacent, but the reference value for the AP is calculated as described above and included in the AP reference information. Of course, even a private AP is used as a reference AP for determining the presence of a neighboring AP if the location information is identified and listed in the AP database.

As another method of checking whether there are other neighboring APs for at least one AP described in the received AP reference information request, an AP database having a built-in tree structure may be used. In this method, the location coordinate information of each AP is not used, and a tree structure database can be constructed as shown in FIG. 12B. FIG. 12B is an example of the database of a tree structure previously constructed assuming the planar position of each AP illustrated in FIG. 12A. The structure of the illustrated database finds a path matching at a lower level in the tree structure by the number of APs (excluded from this number for location unregistered APs) described in the received AP reference information request. ) And the AP or APs at the next level as neighbor APs. For example, if the received AP reference information describes one AP and the AP is AP1, then the access control server 200 may access APs 1211 at the next level of the first level where the AP1 is located, i.e. Consider AP2, AP3, and AP14 as neighboring APs, and if AP1 and AP3 are listed in the received AP reference information request, the APs 1212 at the third level in the matching path, that is, AP2, AP11, AP14 and AP15 Is considered to be an adjacent AP. If there is no AP node of the next level on the matching path, the neighbor AP is considered to be absent. As in the above example, if the received AP reference information request lists three APs AP1, AP2, and AP3, the access control server 200 determines the path (where AP nodes are matched in the order described). Path 1221 if the order described is AP1, AP2, AP3, path 1222 if the order is AP1, AP3, AP2, and path 1223 if the order is AP2, AP1, AP3. The AP node AP11 at the next level of the last level, that is, the fourth level, is regarded as the neighboring AP. Therefore, if AP1, AP2, and AP3 are described in any order in the received AP reference information request based on the tree structure database illustrated in FIG. 12B, each representative signal for AP11 besides the APs. The expected bandwidth for the intensity section is calculated and described in the AP reference information. If the AP that is not searched at each level of the AP database of the tree structure illustrated in FIG. 12B is described in the received AP reference information request, the AP is regarded as a location unregistered AP and the path matching process is performed with the remaining AP. do. In the case of a single location unregistered AP, the neighbor AP is not searched as in the above-described embodiment.

According to an embodiment of the present invention, a predetermined limit bandwidth, for example, a recommended bandwidth or a minimum bandwidth, may be included in the AP reference information by identifying a signal strength or signal strength interval calculated as an expected bandwidth. The access control server 200, by dividing the signal strength into the sections of the appropriate size in the selected statistical table, and predicted in the manner described above for the corresponding section while selecting one section above or below each partition section The bandwidth is calculated, and the representative value of the corresponding partitioning section whose estimated estimated bandwidth is closest to the predetermined limit bandwidth but becomes larger than that is shown in the AP reference information as shown in FIG. 10B. 1021). In this case, the signal strength request value 1021 may be a median value, a median value, or a minimum value of the section. For the value of the limited bandwidth, for example, the recommended bandwidth or the minimum bandwidth, the access control server 200 is connected to the limited bandwidth if not previously shared with the AP selection unit 312 of the mobile communication terminal 300R. And a value for the signal together with the signal strength request value 1021 in the AP reference information. In the present embodiment, if the estimated bandwidth calculated for the arbitrary representative signal strength section is smaller than the limited bandwidth, the representative signal strength section may be excluded when the AP reference information is prepared together with the corresponding expected bandwidth.

The AP reference information created in the above manner is transmitted to the mobile communication terminal 300R as a response to the AP reference information request previously received (S68). When the personal AP reference information or the group AP reference information is transmitted together, type information (eg, 'personal' or 'group' and 'general') that distinguishes each reference information is included.

The AP reference information transmitted from the access control server 200 is restored to data via the cellular modem 31a and the cellular codec 31b of the mobile communication terminal 300R and transmitted to the operating system 300a. The operating system 300a analyzes the corresponding data in the session layer, identifies the session, and transfers the data to the AP selection unit 312 through a previously generated communication socket 310c associated with the session. .

When the AP selecting unit 312 receives the AP reference information, the AP selecting unit 312 requests the operating system 300a to search for neighboring APs and checks identification information and signal strength information about the APs searched for signals (S69a). ). According to an embodiment of the present invention, if the AP strength information is checked and stored as AP discovery information in addition to the identification information of each AP to prepare the AP reference information request, the stored AP discovery information without the above search is stored. You can also check. For the signal strength of each identified AP, an estimated bandwidth is obtained based on the signal strength representative value described in the received AP reference information and a reference value thereof, for example, an expected bandwidth. When an AP whose signal strength is not confirmed is listed in the received AP reference information, bandwidth estimation is naturally excluded for the AP. The method for obtaining the estimated bandwidth is the same as that described with reference to FIG. Referring to the example of FIG. 11, the identified signal strength value becomes a specific signal strength point 1101 on the corresponding figure. Of course, if the confirmed signal strength corresponds to the interval representative value described for the corresponding AP, the reference value for the interval representative value is assumed as the estimated bandwidth without a separate process. If the single AP representative value for the AP is described in the received AP reference information, the AP selector 312 uses a change characteristic of the reception speed with respect to the normal signal strength, from the representative value and the corresponding expected bandwidth. Obtain an estimated bandwidth for the identified signal strength. The AP selecting unit 312 determines the priority of each AP according to the size of the estimated bandwidth for the AP for which the estimated bandwidth is obtained, and provides access to the corresponding AP while providing AP identification information according to the priority of the operating system ( 300a), the first access to the Wi-Fi network 2 in the corresponding zone or switching between APs is made (S69b).

According to an embodiment of the present invention, the received AP reference information is based on the aforementioned criteria (the magnitude of the average value of the expected bandwidths of the representative signal strength intervals, or of the expected bandwidth for the maximum representative signal strength interval or the lowest representative signal strength interval. If the APs are listed in the order of the highest expected bandwidth based on any one of the magnitudes), the AP selector 312 may determine the order of the APs described in the received AP reference information and the order of the confirmed signal strength. If the same, the AP may be requested to access the APs in the order described until the AP is connected to the AP without obtaining the estimated bandwidth according to the signal strength of each AP.

Of course, when the neighbor AP is searched after receiving the AP reference information, the AP within the AP reference information that is invisible in the search or confirmed by the search is below the predetermined minimum threshold level is naturally excluded from the priority determination. Let's do it. That is, the access request process for the corresponding AP in the received AP reference information does not proceed.

On the other hand, according to the above-described embodiment, even if the score is written instead of the value for the expected bandwidth, the connection request in the order of the AP is estimated in the same manner as the estimation of the expected bandwidth in the highest estimate. Of course, the equations used to estimate the estimated bandwidths may be somewhat different or additional steps may be involved, but the principles are the same.

In the case where personal or group AP reference information is also received according to the above-described embodiment, the AP selecting unit 312 may use the personal AP reference information or the group AP reference information than the general AP reference information according to the currently set mode. You can also apply it first. For example, through a user UI (User Interface) provided by a user through an input / output unit (the display panel 5, the touch sensor 6a, the keypad 6b, etc.) of the mobile communication terminal 300R. If the value of the "reference information application mode" set for the adaptive AP selector 310 and shared by the AP selector 312 is "Personal Priority" or "Group Priority", the personal AP reference information or the group AP By using the interval representative value and the reference value for APs of reference information, the estimated estimated bandwidth or estimated score of the current signal strength is calculated and the connection request is made in the order based on it. If the value is “general priority”, the general AP reference information Using the interval representative value and the reference value for the APs, the estimated estimated bandwidth or the estimated score of the current signal strength is obtained, and the access request is made in the order based on the estimated bandwidth. If the access to the AP is not made based on the applied reference information, the AP access request is applied by applying other reference information.

According to the above-described embodiment, when the AP selector 312 constructs statistical tables having the structure as shown in FIG. 7B, the AP selector 312 detects the searched neighbors identified from the operating system 300a. With respect to the current signal strength of each AP of the AP, the access control server 200 specifies a statistical table in the same manner as the method of calculating a reference value for the representative signal strength interval of each AP in the AP reference information request to specify the expected bandwidth Calculate. As described above, the interval for the current signal strength is determined by a width determined in an appropriate manner using the current signal strength as the center value (920 of FIG. 9A). Then, the AP generates the AP reference information that adds the estimated bandwidth (or the estimated score scored) calculated as above, and accesses the APs by considering the generated AP reference information and the received general AP reference information together. The request will proceed. Considering the method, the application order of the reference information may be changed according to the set mode, or the estimated bandwidth (or estimated score) or the estimated estimated bandwidth (the same AP in both reference information may be weighted according to both reference information). There may be a method of requesting connection in ascending order of average value calculated.

According to an embodiment of the present invention described with reference to FIG. 10B, when the signal strength request value 1021 is included in the AP reference information, the AP selector 312 determines that the current signal strength of each neighboring AP is determined. If the signal strength request value described for the AP does not fall within a certain allowable range, the AP may be excluded from the access request.

As described in detail above, since the data service characteristics of each AP are reflected in the statistics of FIGS. 7A, 7B, or 7C, the bandwidth estimated from the random signal strength of the AP from them is likely to be close to the actual supported speed. Very high. Accordingly, the mobile communication terminal 300R selects one AP among which the neighboring APs to be searched have the fastest speed of data service in consideration of the received signal strength reflecting the relative distance from the AP. Access to the AP. For example, according to the present invention, as illustrated in FIG. 13, the average transmission rate is near, but the average number of accessors is on the average, or the communication state behind the access point is not sufficient, and the network state is not good on average, resulting in an actual transmission rate. In an overlapped area by an AP that does not support a saturated service characteristic 1310 and an AP that exhibits a proportional service characteristic 1320 that is somewhat separated but has an average number of users, which may provide some transmission speed. If so, the connection is made to the latter AP, which is likely to provide a higher expected bandwidth pBW2 than the former AP, despite the relatively high signal strength SS1 for the former AP.

When the access to the AP is made, the AP selecting unit 312 calculates the estimated bandwidth obtained for the current signal strength based on the estimated bandwidth or the statistics table as shown in FIG. The AP information report unit 311 is notified.

If the AP is not listed in the received AP reference information, or there is no AP that satisfies the access requirement according to the above-described conditions, or if all of the accesses to the AP fail, the AP selector 312 determines the AP. Abandoning a connection request and maintaining a connection to a mobile communication network (typically, when no special connection request is made, the operating system 300a remains connected to the cellular network 20.) or the A data connection to the mobile telephone network is requested.

Meanwhile, the AP information reporting unit 311 measures and reports the actual bandwidth used as described above when an application uses a data service provided by the Wi-Fi network 2 through an AP to which an application is currently connected. Will be performed. During the measurement process, the AP reselection unit 312 selects the AP reselection if the actual measured bandwidth that is currently measured is less than or equal to a preset limit bandwidth or a bandwidth lower than an allowable range notified by the AP bandwidth notified by the AP selector 312. Ask. The AP reselection request includes identification information about the AP for which the current actual bandwidth is measured. When the estimated bandwidth notified from the AP selector 312 is used as a criterion for the reselection request, the AP information report unit 311 is provided with response data for FTP or HTTP request requesting transmission of a large amount of data. It will only compare with the measured bandwidth. This is a condition that can provide the quality of the expected bandwidth, but the actual bandwidth measured when the requesting object is based on slow streaming that does not require that quality or only a small amount of data is available, allows for more than the expected bandwidth. This may be lower than the range, in order to prevent AP reselection in this case.

When the AP reselection request is requested from the AP information reporting unit 311, the AP selecting unit 312 may use the AP reference information as the AP identification information included in the request or as the identification information of the AP newly identified through the search. A request form is constructed and transmitted to the access control server 200, and the AP is selected based on the AP reference information received from the response and the signal strength of each AP currently checked. In this case, transmission of the AP reference information request and reception of the AP reference information may be performed through the Wi-Fi network 2 by the AP currently connected rather than the cellular network 20. In another embodiment according to the present invention, when the AP reselection is requested, the AP selector 312 does not configure and transmit the AP reference information request, but instead, re-checks the signals of the respective APs through rescanning of the neighboring APs. For the strength, a process of selecting an AP and requesting an access may be performed according to the order of estimated bandwidth of each AP estimated using the previously received AP reference information. In accordance with the access request, the access point may be connected to another AP from the currently connected AP. When the access to the AP is made, the AP selector 312 responds with a 'success' to the previously requested AP reselection. If not, for example, the AP to be connected is other than the AP included in the AP reselection request. If the received AP reference information is not present or if the received expected bandwidth is less than or equal to the threshold bandwidth, the response is 'failed'. Meanwhile, until the response is received, the AP information reporting unit 311 may not request the AP reselection again. When the AP selecting unit 312 responds with a failure, the AP selecting unit 312 may request the operating system 300a to make a connection for the data service to the cellular network 20.

In one embodiment according to the present invention, when the AP selecting unit 312 constructs the AP reference information request, as shown in FIG. 14, the required bandwidth 1401 required for the smooth data service is added. It may be. This required bandwidth can be determined in various ways. For example, when any application is started to request a data service, the adaptation specified by the identification information directly or by the identification information specified by the AP selection unit 312 specified by the identification information of a process or an application which is shared and set in advance. It may be determined by being mediated by the AP selector 310 and delivered to the AP selector 312. Alternatively, the registration is performed by confirming whether or not the pre-registered application is started from the required bandwidth information which is preset in the adaptive AP selector 310 and registered for each process (or application) shared by the AP selector 312. It can also be determined by the required bandwidth set for a given application. Alternatively, the AP selection unit 312 may separately receive a request according to the communication protocol requested from the application to the AP information report unit 311 so that the host and / or the request item (eg, described in the request) are received. For example, the required bandwidth may be determined according to the type of file).

Upon receiving the AP reference information request including the required bandwidth, the access control server 200, for each AP described in the request, as in the above-described embodiment of calculating the predetermined limited bandwidth, the required bandwidth The signal strength section in which the expected bandwidth higher than the allowable range is calculated is identified, and the AP reference information including the representative representative value of the identified signal strength section together with the identification information of the corresponding AP is configured. In the AP reference information configured as described above, the required bandwidth described in the request may be described. In one embodiment according to the present invention, if there is a predetermined or adaptively selected representative signal strength section in a signal strength region higher than the calculated signal strength section in which the necessary representative value is calculated, the expected bandwidth is calculated for the section. The representative value for the section may be additionally described in the configured AP reference information. In one embodiment according to the present invention, in addition to the information on the required bandwidth, the signal strength section in which the predetermined limit bandwidth is calculated as an expected bandwidth may also be found, and a representative value of the section may be further described in the AP reference information.

When the AP reference information including the section information on the required bandwidth is received according to one of the above-described embodiments, the AP selector 312, as described above, re-searches the neighboring AP to confirm or previously searched. If the signal strength of any AP identified from the stored AP discovery information is greater than the information on the required signal strength of the corresponding AP described in the AP reference information, that is, the required representative value, the access request is made to the corresponding AP. If there are a plurality of such APs, the AP selector 312 makes a request for access to the AP having the largest expected bandwidth estimated for the identified signal strength from the required representative value and the required bandwidth for the AP. As a method of estimating, if the representative value and the expected bandwidth of the additional interval (representative signal strength interval) higher than the required representative value are included in the AP reference information, the method described with reference to FIG. 11 is applied from the sets. If there is no additional section, the estimation method according to the change characteristic of the reception speed compared to the normal signal strength of the AP is applied. If the estimated bandwidth estimated from the checked signal strengths for all the searched APs is smaller than the required representative value for the corresponding AP, the AP selector 312 may be configured to access the cellular network 20 for data service. request. Alternatively, the access request may be made to the AP having the highest estimated bandwidth estimated based on the interval representative value (including the necessary representative value) described in the received AP reference information and the corresponding bandwidth for each identified signal strength.

On the other hand, in the manner described above, the required bandwidth of any application that is launched after connecting to the AP can also be confirmed by the AP information reporting unit 311, the actual bandwidth that is currently measured by itself (a large amount of data When the bandwidth measured only for response data to the HTTP request requesting transmission is lower than a predetermined allowable range or more, the AP information report unit 311 requests the AP selector 312 to reselect the AP. It may be. In this case, the required bandwidth is requested for AP reselection, and the AP selecting unit 312 constructs an AP reference information request further describing the required bandwidth 1401 in the manner illustrated in FIG. 14 according to the request. Transmit to the access control server 200 via the cellular network 20 or Wi-Fi network (2). According to the embodiment illustrated in FIG. 8B, terminal identification information may be added to the AP reference information request. When the AP reference information including the information on the required bandwidth, which is the response, is received, the AP is selected in the same manner as described above, and the operating system 300a requests the access to the AP.

In another embodiment according to the present invention, when the AP selector 312 receives an AP reselection request from the AP information reporter 311, the AP control information is configured by configuring the AP reference information request. Instead of performing an operation for transmitting to the neighboring AP, the neighbor AP may be re-discovered, and the AP strength of each AP confirmed through the AP reference information including information on the required bandwidth, which has been previously received, may be compared again to request access to another AP. . That is, except for the AP that is currently connected, if there is one AP whose signal strength is greater than the required representative value described in the AP reference information, the AP, and the plurality of APs, the AP having the largest estimated bandwidth estimated for the signal strength. Perform the connection request.

In response to the AP reselection request, when connected to an AP showing a signal strength estimated to be greater than or equal to the required bandwidth appended to the request, the AP selector 312 reports “success” as the AP information report unit 311. If the connection is made to the cellular network 20 or if the access is made to an AP having an expected bandwidth of less than the required bandwidth, the device responds with a failure to the AP information reporting unit 311. do.

Meanwhile, in one embodiment according to the present invention, when the AP information reporting unit 311 requests the AP reselection to the AP selection unit 312, the currently measured actual use that caused the reselection is requested. AP characteristic information including information on bandwidth may be configured as described above and provided to the access control server 200.

According to an embodiment of the present invention, when the AP information reporting unit 311 of the mobile communication terminal 300P configures characteristic information on the AP to which the AP is currently connected, the signal is illustrated in FIG. 5A or 5B. In addition to the strength and the measured bandwidth, the required bandwidth of the received data from which the bandwidth is measured is included in the characteristic information. The requested bandwidth is a field of b field that designates a bandwidth in media information described as a header [for example, a Session Description Protocol (SDP) included in a response according to a communication protocol request, for example, an RTSP / RTP request. Value can be identified from the bandwidth information recorded in the value]. Alternatively, the metadata for the content object (eg, header of the video or audio stream) included in the response may be decoded and identified from the bitrate for video and / or audio.

As described above, when the request according to the communication protocol is a specific type, for example, a request of an object based on FTP or HTTP, the server usually supports the physical communication resources within a range that can be supported regardless of the required bandwidth of the content object. Will transmit at maximum speed. When the actual bandwidth is measured for the response according to the request, the AP information reporting unit 311 sets the information on the requested bandwidth of the characteristic information on the AP to a specific value, for example, 'unnecessary' or '0'. List it.

As described above, the characteristic information on the AP in which the required bandwidth is further described is transmitted to the access control server 200 by the AP information report unit 311 as in the above-described embodiment.

The access control server 200 calculates a score for the actual bandwidth used in the received AP characteristic information, and displays the AP characteristic statistics table of the public classified as in the above-described embodiments (or in the case of the embodiment of FIG. 5B). In addition to the individual AP characteristics statistics table). In other words, each score calculated in the "Quality Score" field instead of the "actual BW" field is recorded in each statistical table illustrated in FIGS. 7A, 7B or 7C. The access control server 200 calculates a quality score for the bandwidth information described in the received AP characteristic information according to the process illustrated in FIG. 15A.

The access control server 200 calculates a quality score according to a predetermined rule with respect to the measured value S1501a of the actual bandwidth used in the received AP characteristic information. The predetermined rule may be a function value S1502a according to the primary function 1601 or the logarithmic function 1602 using the measured value as an independent variable, illustrated in FIG. 16A. The coefficient k of the linear function 1601 illustrated in FIG. 16A may be one. This means that the measured actual bandwidth is used as the quality score. Thus, the meaning of the term “quality score” herein does not exclude a value indicating bandwidth. The correction score is also calculated according to a predetermined rule with respect to the difference between the actual measured value and the required bandwidth. If the information on the required bandwidth is written as a specific value such as 'unnecessary' or '0', the correction score for the difference is assigned to '0'. As one of the predetermined rules, the function value S1502b corresponding to the function is obtained by applying one function 1601 or 1602 illustrated in FIG. 16A by using the absolute value S1501b of the difference as an independent variable. If the actual measured value is smaller than the required bandwidth, the value is made negative (S1503b). The function illustrated in FIG. 16A is for example only and various other functions that give a function value in a one-to-one correspondence to a given value may be used.

When the quality score (Pt_aBW) for the actual measured value and the correction score (Pt_BWdif) according to the difference between the required bandwidth and the measured value are calculated, respectively, the weights (0) appropriately selected for these quantity scores as shown in Equation 1 below: The final quality score Pt is calculated by multiplying? Alpha, beta < RTI ID = 0.0 > 1 < / RTI >

Pt = α x Pt_aBW + β x Pt_BWdif (where α + β = 1) (Equation 1)

In another embodiment according to the present invention, instead of correcting the quality score Pt_aBW for the actual measured value by adding or subtracting the corrected score as in the above-described embodiment, the correction is performed according to the difference between the required bandwidth and the measured value. The quality score may be corrected by obtaining a ratio. 15B illustrates a process of calculating a final quality score with respect to the bandwidth information described in the received AP characteristic information. Also in this embodiment, the quality score Pt_aBW for the actual measured value is obtained by applying a function as illustrated in FIG. 16A, and the correction ratio according to the difference between the required bandwidth and the measured value is as illustrated in FIG. 16B. The same function 1611, for example, if the measured value is less than the required bandwidth and shows a difference within the required bandwidth and within a predetermined size 1612, gives a value greater than 1 in inverse proportion to the difference and 1 if it is larger than the required bandwidth. It is obtained from a value according to a function giving a larger maximum ratio value r_max. As the maximum ratio value r_max, an appropriate value, for example, 1.2, 1.5 or 2.0, may be selected within a range that does not excessively increase the quality score Pt_aBW. Also in this embodiment, as in the above embodiment, the quality scores Pt_aBW for the actual bandwidth in the received AP characteristic information are calculated (S1521a, S1522a), and the difference between the actual measured value and the required bandwidth is shown in FIG. The correction ratio r_BWdif is obtained by applying a function as illustrated in 16b (S1521b and S1522b). If the information on the required bandwidth is described as a specific value such as 'unnecessary' or '0', the correction ratio is assigned to '1' without applying a function. When the quality score (Pt_aBW) for the actual measured value and the correction ratio (r_BWdif) according to the difference between the required bandwidth and the measured value are respectively obtained, they are multiplied by these (S1531) to obtain the final quality score (Pt) according to Equation 2 below. It calculates (S1532).

Pt = r_BWdif x Pt_aBW (Equation 2)

According to Equation 1 or 2 above, the quality score for the measured actual bandwidth is corrected by the quantified variable how much the bandwidth is in accordance with the required bandwidth. The degree of correction depends on the selection of the coefficient values of α and β in the case of the embodiment of FIG. 15A (in the embodiment of FIG. 15A, if α is 0, the quality score can only be a correction score; Quality scores can only be scored on). In the embodiment of FIG. 15A, if the measured bandwidth is larger than the required bandwidth, the quality score is further added by the difference, and when the bandwidth is small, the quality score is further reduced by the difference (as described above, correction for the difference). The score PT_BWdif is negative when the measured bandwidth is smaller than the required bandwidth (S1503b).) In the case of the embodiment of Fig. 15B, when the measured bandwidth is more than a certain extent close to the required bandwidth, the quality is as close as that is. The score is increased and, if it is over the required bandwidth, it is increased to the maximum ratio.

The access control server 200 further describes the calculated final quality score Pt together with the signal strength in the characteristic information on the statistical table selected according to the classification condition. Alternatively, when the quality scores, which are previously calculated, are described as average scores for a certain signal intensity, the newly calculated quality score Pt is reflected in the average score m _old of the same signal strength section. The new average score (m _new ) may be obtained and written according to the following equation.

Where N is the number of quality scores from which the previous average score was obtained.

In another embodiment according to the present invention, a new average score (m _new ) may be obtained and described according to the following equation so that the newly calculated quality score (Pt) is more reflected in the average value.

(Where δ is a weight that reflects the newly calculated quality score, and an appropriate value of zero or more is selected according to the degree of reflection.)

FIG. 17 is a graph illustrating an example of a statistical table prepared according to an embodiment in which each calculated quality score is separately described together with the signal strength. In this embodiment, as described with reference to FIGS. 9A, 9B, and 9C, when the AP reference information request is received from the mobile communication terminal 300R in the Wi-Fi zone, each AP and each neighbor listed in the AP reference information request are received. For the AP, at least one representative signal strength section 1710 is determined, and the analysis range 1730 is determined by checking the variation range of the quality score for the determined section, and statistical elements of the analysis range 1730 In other words, the evaluation score is calculated from the quality scores. The evaluation score may be calculated in the same manner as that of calculating the expected bandwidth in the above-described embodiment. Preferably, the evaluation score is calculated as an average value for the quality scores in the determined analysis range 1730. In the case of calculating the average value, it may be calculated by weighting a larger value according to the elapsed time and days of the quality scores in the analysis range 1730. For example, if the elapsed time is averaged only for quality scores within a month, obtain the partial mean value for each time period divided by each elapsed time and days, and then within 15 minutes and within 30 minutes for each partial mean value. An evaluation score may be obtained by multiplying weights of 0.6, 0.2, 0.1, 0.07, and 0.03 in time, within a week, and within a month in a time zone (for example, at work). To this end, when the quality score is calculated from the characteristic information as described above, the calculated date and time are recorded in association with the quality score. The method of calculating the average value by weighting the partial average value for each elapsed time may of course be applied to the above-described expected bandwidth calculation. In addition, the weight given to the partial mean value may be variably set according to the number of statistical elements belonging to the corresponding time period. For example, if the number of statistical elements belonging to the time interval within 15 minutes is less than the lower limit, the value of 0.6 in the above example may be set to 0.4 and the average value may be set to 0.8 if the upper limit is larger than the upper limit. Of course, accordingly, the weights of other time periods are appropriately reduced or increased so that the sum of the total weights is one.

The AP 200 receives a reference value for a representative signal strength interval selected for each AP or neighboring APs of the APs included in the received AP reference information request, for example, when the evaluation score is calculated. Regarding the signal strength section representative value 1720 and the evaluation score for the section in association with the identification information of the corresponding AP, the general AP reference information is constructed and provided to the mobile communication terminal 300R. Alternatively, as in the above-described embodiment of creating the AP reference information by using the estimated bandwidth as an example, the general AP reference information may be configured and provided by listing the APs in ascending order of evaluation scores estimated based on a specific signal strength point. It may be. Of course, in the present embodiment, when the terminal identification information is included in the AP reference information request, personal AP reference information may be configured and provided.

In another embodiment according to the present invention, when the AP reference information request terminal identification information or model information does not separately configure the personal AP reference information or group AP reference information, for personal AP characteristics statistical table or group Calculate a reference value that reflects the evaluation score for the representative signal strength interval of each AP calculated from the AP characteristic statistics table and the evaluation score for the same representative signal strength interval for each AP calculated from the AP characteristic statistics table, for example, the combined score The AP reference information described with the interval representative value may be configured. In this case, as in the above-described embodiment, the APs may be listed in the AP reference information in the order of the combined points estimated based on the specific signal strength points. The method of calculating the combined score may be obtained by multiplying and adding the individual weights 0 <δ, ζ <1, δ + ζ = 1 to each evaluation score. In this case, the weight multiplied by the evaluation score calculated from the personal AP characteristic statistics table or the group AP characteristic statistics table among the individual weights may be set to have a larger value than other weights. This is for the evaluation score by the personal AP characteristic statistics table or the group AP characteristic statistics table to act more largely in determining the priority of AP.

In the above-described embodiments, when the access control server 200 receives the AP reference information request, the AP reference information is configured and provided to the mobile communication terminal 300R as described above. However, in another embodiment according to the present invention, when a report of AP characteristic information is received from the mobile communication terminal 300P, the report is regarded as a request for reference information, and the above-described various implementations performed when the AP reference information request is received. The same operation as that according to the examples may be performed. In other words, the AP reference information is represented as the representative signal strength interval representative value of the AP described in the received AP characteristic information and the neighboring APs of the AP identified by the method described with reference to FIG. 12A or 12B and the calculated reference value. It may be configured and provided to the mobile communication terminal 300P as an "ACK" for reporting the AP characteristic information. At this time, the AP reference information is received by the AP information reporting unit 311 of the mobile communication terminal 300P and transmitted to the AP selecting unit 312.

In addition, in the above-described embodiments, the access control server 200, in the statistical table prepared as the measurement bandwidth for each AP received, a predetermined time to reflect the latest usage environment or state for each AP, etc. As a rule, the previous statistical elements, ie measured values or output scores, are deleted from the statistical table. For this purpose, the measured value or the calculated score of each statistical table is recorded in association with the date and time at which it was obtained. Based on the date and time, for example, statistical elements that have passed one week, ten days, or one month are deleted from the statistical table. In another embodiment according to the present invention, instead of collectively deleting according to the elapsed time, as described above, one measurement value is received and a statistics table for recording the measurement value is specified and received in the statistics table. When listing a measured value, the elements whose elapsed time elapses for a predetermined time or the oldest element among the listed measured values which are almost in the same range as the measured value may be deleted.

The various embodiments described so far may be selectively combined and implemented in various ways unless incompatible with each other.

Meanwhile, the access control server 200 described in the above embodiments may include a network connector 201, an AP information processor 202, and a DB manager 203 as illustrated in FIG. 18. The access control server 200 may be composed of a single computing device or a plurality of computing devices that are independent of each other. When each of the components is built as an independent computing device, for example, a server (server), they are interconnected by a leased line or a dedicated network, and mutual communication is performed under an appropriate network security communication protocol. Each of the above-described components illustrated in FIG. 18, that is, the network connector 201, the AP information processor 202, and the DB manager 203, may be the above-described operation performed by the access control server 200 in various embodiments. They will work together.

The network connector 201 communicates with the mobile communication terminals 300P and 300R through the cellular network 20 and / or the Wi-Fi network 2 and requests AP characteristic information and AP reference information from them. Receives and transmits it to the AP information processor 202, and when the AP reference information is received from the AP information processor 202 to transmit to the terminal in response to the request. In addition, the management of communication logical objects such as sockets and / or sessions to provide the AP reference information by specifying the mobile communication terminal 300R sending the AP reference information request or the mobile communication terminal 300P sending the AP characteristic information. do.

The AP information processor 202 is configured to classify the AP characteristic information received from the network connector 201 according to a time point (or measurement date / time information described in the characteristic information) (for example, a day and a non-working day). Determine whether or not, time zone, etc.) and transmit the AP characteristic information received along with the determined condition information to the DB manager 203 to request databaseization. At this time, if the received AP characteristic information includes the terminal identification information, the database is also requested to the personal AP characteristic statistics table. When the AP reference information request is received from the network connector 201 (even if AP characteristic information is received in some embodiments), the neighbor AP for the AP or APs described in the AP reference information request (or AP characteristic information). Check them from an existing database. The pre-classified condition is determined according to the time point at which the AP reference information request (or AP characteristic information) is received, and the determined condition information is transmitted to the DB manager 203 together with the identification information of each of the AP and the neighboring APs described above. Forwarding, requesting measurement bandwidths or calculated scores within a range or analysis range (930 or 1730) of one or more representative signal strength intervals selected in the statistical table for each AP, and requesting When the measurement bandwidths or the calculated scores are received as a response, or when the location information of the storage space capable of identifying them is received, the AP information processor 202 selects the statistical elements as described in the above-described embodiments. Analyze the estimated bandwidth or evaluation score which is a reference value, and the AP reference information described for each AP together with the representative value of the corresponding interval. Request transmission to the mobile communication terminal. Of course, the APs may be listed and transmitted in the order of the magnitude of the value estimated based on the specific signal strength point.

In addition, according to the above-described embodiments, the AP information processor 202 identifies various information elements, for example, the signal strength request value or the required representative value, and adds the AP information to the AP reference information. You can also organize information. In addition, if there is terminal identification information in the received AP reference information request, the DB management unit 203 will provide data within a variation range (or analysis range) for a representative signal strength section in the personal AP characteristic statistics table or the group AP characteristic statistics table. It also requests and analyzes the data to create a personal AP reference. And requesting transmission to the mobile communication terminal while transmitting the created personal or group AP reference information to the network connector 201 together with general AP reference information, or the data within the analysis range (or fluctuation range) as described above. It is used to calculate the combined score.

The DB manager 203 builds a database in a physical storage space managed by the AP information processor 202 according to the classification condition information transmitted by the AP information processor 202 or the built-in database for the characteristic information of each AP received. When newly added and received classification condition information, AP identification information, and information on the representative signal strength section (terminal identification information may be selectively received), the representative selected by specifying one or more statistical tables from the information. Determining data of statistical elements (measured bandwidth values or calculated scores, signal strength, etc.) for the signal strength section, or determining an analysis range by itself and sending the data within the analysis range to the AP information processor 202. Deliver location information of storage spaces that can be delivered or accessed. When the representative signal strength section is adaptively determined according to the distribution of the statistics, the DB manager 203 may determine the corresponding section and transmit it to the AP information processor 202. When the DB manager 203 builds the database, the DB manager 203 may record the date and time of each measured bandwidth value or the calculated score and deliver the date and time when the data is transmitted within the variation range. In addition, the DB manager 203 deletes the elapsed period of time so that the latest measured values or scores are reflected.

In one embodiment according to the present invention, the AP information processor 202 may be configured as a characteristic information processing unit and a reference information processing unit which are independent computing devices. The characteristic information processing unit performs the above-described operation such as processing the received AP characteristic information as described above, requesting the DB manager 203 to database the AP characteristic statistics table, and the reference information processing unit, Identify APs of the AP listed in the received AP reference information request or AP characteristic information, and configure AP reference information by using the statistical table databased in the DB manager 203 for each AP including the identified neighbor APs. To perform the above-described operation. In the present embodiment, the network connector 201 may also be integrally formed by distributing the above-described functions and necessary hardware resources to the characteristic information processor and the reference information processor configured as separate computing devices.

In order to interconnect the request and the response by the information transfer between the network connector 201, the AP information processor 202, and the DB manager 203, the information identifier included in the request is included in the response or the information is answered. May be added in response to the request.

As mentioned above, preferred embodiments of the present invention described above are disclosed for the purpose of illustration, and those skilled in the art can improve other various embodiments within the spirit and technical scope of the present invention disclosed in the appended claims below. Changes, substitutions or additions will be possible.

2: Wi-Fi network 20: cellular network
30: Main Control 31a: Cellular Modem
31b: cellular codec 32a: Wi-Fi modem
32b: Wi-Fi codec 34: display driver
35: display panel 36a: touch sensor
36b: keypad 37: memory
200: access control server 201: network connector
202: AP information processor 203: DB manager
300a: operating system (O / S) 300P, 300R: mobile communication terminal
310: Adaptive AP selector 310a, 310b, 310c: Communication socket
311: AP information reporting unit 312: AP selection unit
320: application

Claims (59)

In the method for providing information for accessing a wireless data network,
Upon receiving the access point characteristic information report including information on the signal strength of the access point, information on the bandwidth used from data reception, and access point identification information, the at least one statistical table may be recalled from among the statistical tables previously classified according to the classification conditions. Selecting based on the report of the connection point characteristic information and reflecting the connection point characteristic information in the selected one or more statistical tables;
Based on the access point reference information request in which the access point identification information from the mobile communication terminal is described for the at least one access point, one or more statistical tables for the at least one access point are specified among the previously classified statistics tables, and the specific point is specified. Calculating a reference value for one or more representative signal strength intervals from the statistical table;
The reference information for the wireless network connection comprising the step of constructing the reference information described for each of the corresponding access point described in the access point reference information request to the mobile communication terminal to the calculated one or more reference values How to give. The method of claim 1,
The access point characteristic information further includes information on the signal strength of the access point and unique information on the terminal transmitting the information on the measured bandwidth used,
And the access point reference information request further includes unique information about the mobile communication terminal. The method of claim 2,
The unique information is identification information for uniquely identifying the terminal or model information for the terminal providing reference information for a wireless network connection. The method of claim 3,
The calculating may include specifying a statistical table of the at least one access point based on the access point reference information request from the statistical tables constructed for the unique information of the mobile communication terminal included in the access point reference information request. And further calculating a reference value for the one or more representative signal strength sections from the specified statistical table,
The transmitting may further include transmitting the additionally calculated reference value by further configuring reference information described for each of the at least one access point. The method of claim 3,
Wherein the calculating step comprises:
Specify one or more statistical tables for the at least one access point based on the access point reference information request among the previously classified statistical tables, and calculate a first reference value for the one or more representative signal strength sections from the specified statistical table. Specifying a statistical table for the at least one access point based on the access point reference information request from the statistical tables constructed for the unique information of the mobile communication terminal included in the access point reference information request, and specifying the specified statistical table. Calculating a second reference value for the one or more representative signal strength intervals from;
And calculating the reference value by multiplying the first reference value and the second reference value for each of the same signal strength intervals and adding the multiplied weights, respectively, to obtain the reference information for the wireless network access. 6. The method of claim 5,
In the second step, the reference value is calculated by assigning a weight to the second reference value to be greater than a weight to the first reference value to calculate the reference value. The method of claim 1,
And wherein the reflecting includes listing information on the bandwidth used and the signal strength in the access point characteristic information in the selected one or more statistics table. The method of claim 1,
The previously classified statistical tables are classified by at least weekday or non-working day, and by time zone, and the time zone is at least each time zone when the day is divided so that the time zone for work, the time zone, and the time zone are separated from each other. How to provide reference information for The method of claim 1,
In the calculating step, in calculating the reference value from the specified statistical table, the elements for the latest time period are divided into a plurality of time periods for the elements belonging to the representative signal strength section described in the specified statistical table. The reference information for a wireless network connection is to be reflected to the reference value with a larger weight. The method of claim 9,
If the number of elements belonging to the most recent time period among the divided time periods is large, the specific gravity for the time period becomes large, and if small, the reference information for the wireless network access is adjusted in such a manner that the smaller. How to give. The method of claim 1,
Wherein the calculating step comprises:
Determining an analysis range for the elements in the specified statistical table belonging to the representative signal intensity section;
Calculating the reference value as any one of a minimum value, a maximum value, a median value, a middle value of a rank value having a high degree when divided into a predetermined size class, and an average value obtained from elements within the predetermined analysis range. Providing reference information for a wireless network connection. 12. The method of claim 11,
The first step is to determine the representative signal strength interval by adjusting the width so that the number of elements registered within a predetermined time or more within a predetermined time period to provide the reference information for wireless network access. 12. The method of claim 11,
In the step 1, reference information for wireless network access is determined to determine, as the analysis range, a range excluding elements having a value outside a predetermined standard from the distribution of the elements in the specified signal strength section. How to give. The method of claim 1,
Wherein the calculating step comprises:
A step (1) of searching for a connection point database by searching a connection point database for the connection point included in the connection point reference information request;
Specifying at least one statistical table for the found neighboring access points based on the access point reference information request, and calculating a reference value for at least one representative signal strength section from the specified statistical table,
The transmitting may include transmitting one or more reference values calculated for the searched neighboring access points to the mobile communication terminal by additionally including the identification information of the neighboring access points in the configured reference information. How to give it. The method of claim 14,
The first step is to exclude the access point described in the access point reference information request, which is not found in the access point database, and find the neighboring access point based on the remaining access points. . The method of claim 1,
The calculating may include selecting and variably selecting a section in which statistical elements recorded in the specified statistical table are relatively concentrated in selecting the one or more representative signal strength sections. How to give it. The method of claim 1,
The calculating may include selecting, in the at least one representative signal strength section, a section in which a recent statistical element of which the listed time is within a predetermined time is relatively concentrated among the statistical elements recorded in the specified statistical table. A method of providing reference information for a wireless network connection that is to find and variably select. The method of claim 1,
The transmitting may be performed by checking a comparison amount under the same signal strength condition based on each reference value calculated from the at least one representative signal strength section with respect to the at least one access point, and in order according to the magnitude of the checked comparison amount. And constructing a list in which the at least one access point is aligned with a reference value associated therewith as the reference information and transmitting the list to the mobile communication terminal. The method of claim 1,
Wherein the reference value is a value for a bandwidth or a quality score for the bandwidth. The method of claim 1,
The transmitting may include, for each of the one or more representative signal strength sections, the section representative value for allowing the mobile communication terminal to know the section to configure the reference information. How to Provide Information. The method of claim 1,
The calculating step may further include: dividing the specified statistical table into a plurality of signal strength sections, and calculating a reference value of each division section, and finding a division section from which a reference value supporting a specified bandwidth is obtained.
In the transmitting, the reference information is configured by further describing a section representative value for allowing the mobile communication terminal to know the found division section. 22. The method of claim 21,
And wherein the specified bandwidth is the required bandwidth described in the received access point reference information request. The method of claim 1,
And the calculating step is initiated by considering the access point characteristic information report as the access point reference information request. An apparatus for providing information for accessing a wireless data network,
Upon receiving the access point characteristic information including the information on the used bandwidth and the access point identification information measured at the time of data reception, based on the report of the received access point characteristic information, one or more statistical tables based on the classification conditions are classified. And a first processing unit configured to reflect the connection point characteristic information in the selected one or more statistical tables,
If there is a request for access point reference information in which information on signal strength and access point identification information are described for at least one access point, the access point reference information request is included in one or more statistical tables of the at least one access point among the previously classified statistics tables. A reference value for one or more representative signal strength sections is calculated based on the specific statistical table, and the calculated one or more reference values are described for each corresponding connection point described in the connection point reference information request. And a second processor configured to configure information, and to transmit the configured reference information to the mobile communication terminal that has transmitted the access point reference information request. 25. The method of claim 24,
And the second processing unit is further configured to regard the access point characteristic information report received by the first processing unit as the access point reference information request. The method of claim 24 or 25,
Receive the report of the access point characteristic information or the access point reference information request from the mobile communication terminal through a communication network and transmit the request to the first processing unit and the second processing unit, respectively; And a network connection unit configured to receive from the second processing unit and to transmit the access point reference information request to the mobile communication terminal. A mobile communication terminal capable of accessing a plurality of heterogeneous networks including a wireless data network,
Check the signal strength from the access point of the wireless data network, measure the bandwidth used when receiving data from the access point, and the information on the identified signal strength, the information on the measured bandwidth used and the identification information of the access point An information reporting unit configured to configure the connection point characteristic information to be included and report to a remote server through any one of the plurality of heterogeneous networks;
Is configured to transmit a connection point reference information request including identification information of one or more access points belonging to the wireless data network to a remote server, and when the reference information including one or more reference values for at least one access point is received, the reference information described in the reference information is described. A mobile communication terminal comprising a connection point selector configured to determine a priority for each connection point based on each reference value of the connection point and the signal strength identified for the connection point, and request a connection to the connection point according to the priority. . 28. The method of claim 27,
And the information on the signal strength is information determined as an average value of the signal strength values checked a plurality of times. 28. The method of claim 27,
And the information reporting unit is configured to measure the use bandwidth from a value obtained by dividing the amount of data received within a measurement time, or from an average value of values obtained by dividing the amount of data received respectively within a plurality of measurement times. 30. The method of claim 29,
And the information reporting unit is configured to variably set the length of the measurement time to measure the bandwidth used according to the type of request by the communication protocol for which the data reception is made. 28. The method of claim 27,
The information reporting unit further comprises the unique information about the mobile communication terminal to configure the access point characteristic information,
The access point selector is configured to further include the unique information for the mobile communication terminal in the access point reference information request. 32. The method of claim 31,
The unique information is identification information for uniquely identifying the terminal or the model information for the terminal. 28. The method of claim 27,
The information reporting unit, the mobile communication terminal further comprises information on the required bandwidth of the received data to measure the bandwidth used to configure the access point characteristic information. 28. The method of claim 27,
The information reporting unit, the mobile communication terminal further comprises information on the date and time the bandwidth measured. 28. The method of claim 27,
The access point selecting unit is configured to further include information on the required bandwidth required for data service in the access point reference information request. 36. The method of claim 35,
The required bandwidth is determined from any one of a bandwidth required by an application, a bandwidth listed in association with the arbitrary application, and a bandwidth listed in association with a server requesting data by the arbitrary application. Mobile terminal. 28. The method of claim 27,
The connection point selector, for each of the connection points, estimates a reference value for the signal strength confirmed for the connection point on the basis of each reference value of the connection point, and based on the magnitude of the reference value estimated for each connection point. And determine the priority of the mobile communication terminal. 28. The method of claim 27,
And the connection point selecting unit is further configured to request connection to the connection point first when the signal strength for the connection point having the fastest list order in the reference information is the highest in the signal strength confirmed for each connection point. terminal. 28. The method of claim 27,
In determining the priority, the access point selector is configured to determine whether each reference value is for a predetermined signal strength section or based on a signal strength section described in association with the reference value in the reference information. A mobile communication terminal that is configured. 28. The method of claim 27,
The connection point selector may specify one or more statistical tables for the at least one connection point from among statistical tables previously classified according to a classification condition, based on the connection point reference information request, and identify the corresponding connection points from the specified statistical table. And calculating reference values based on signal strengths to further generate reference information describing the calculated reference values for each of the at least one connection point. 41. The method of claim 40,
The connection point selector is configured to calculate the amount based on an estimated reference value obtained for the signal strength identified for the connection point based on each reference value of each connection point described in the received reference information and each reference value described in the generated reference information. And requesting connection to the access points in the reference information selected in the reference information or to the access points in the both reference information sequentially. 28. The method of claim 27,
The reference value is a value for a bandwidth or a quality score for a bandwidth terminal. 28. The method of claim 27,
The received reference information further includes information on the signal strength of each connection point described,
The connection point selector determines the priority of the connection point if the signal strength identified for each connection point in the reference information is lower than a predetermined allowable range than the information on the signal strength described in the reference information for the connection point. The mobile terminal is configured to exclude from. 28. The method of claim 27,
The signal strength confirmed with respect to the corresponding access point is a signal strength checked through the access point search of the wireless data network before receiving the reference information, or a signal strength checked through the access point search of the wireless data network after the reception of the reference information. The mobile communication terminal. 28. The method of claim 27,
The access point selecting unit, after the connection to the specific access point described in the received reference information is made, if the use bandwidth measured by the information reporting unit is lower than a given reference value, through the search of the specific access point or the wireless data network And reconfigure an access point reference information request including the identified access point and send it to a remote server. 46. The method of claim 45,
If the connection point selection unit cannot determine the connection point to be connected from the reference information received in response to the reconfigured transmission point reference information request or if all of the connection requests fail, the connection point selecting unit is configured to send data to the mobile telephone communication network belonging to the plurality of heterogeneous networks. Mobile communication terminal configured to request a connection for a service. 28. The method of claim 27,
The access point selector is configured to connect to a specific access point described in the received reference information, and if the usage bandwidth measured by the information reporter is lower than a given reference value, each of the current access points through the search of the wireless data network. Confirming the signal strength of and re-determining the priority of each connection point described in the received reference information based on each reference value of the connection point and the current signal strength, and for the corresponding connection point according to the determined priority again. The mobile terminal is further configured to request a connection. 28. The method of claim 27,
The information reporting unit, if the usage bandwidth measured after the connection to the specific access point described in the received reference information is lower than a given reference value, the access point including information on the use bandwidth and the signal strength at that time The mobile terminal is further configured to reconfigure the characteristic information to report to the remote server. 49. The method of any one of claims 45, 47 and 48,
Wherein the given reference value is a predetermined limit bandwidth, an expected bandwidth obtained based on the signal strength identified for the specific access point, or a bandwidth required by a started application for data service. 28. The method of claim 27,
And the access point selecting unit is configured to check whether a current state of the mobile communication terminal corresponds to a preset condition, and to transmit the access point reference information request when the connection state corresponds to a preset condition. 51. The method of claim 50 wherein
The preset conditions may include unlocking the locked state of the mobile communication terminal, every period according to a set search period, starting a predetermined application, requesting a connection of a network of an arbitrary application, requesting entry of the wireless data network from an external server, and receiving the request. And at least one of cases where data to be requested requires a high bandwidth of a predetermined criterion or higher. 51. The method of claim 50,
When the current state does not correspond to the preset condition, the access point selector suppresses the access point search function of the wireless data network of the operating system implemented in the mobile communication terminal, and corresponds to the preset condition. And activating the access point searching function. The method of claim 52, wherein
The access point selector is further configured to perform an operation to prevent the operating system from using history information, which is a previous access record to the wireless data network, before the operating system performs the access point search function according to the activation of the access point search function. Communication terminal. 28. The method of claim 27,
The received reference information is configured to include first reference information and second reference information, each of which is divided into types,
The connection point selector first selects one of the two reference information according to the set mode, and then, for each connection point described in the selected reference information, the priority is based on each reference value of the connection point and the signal strength confirmed for the connection point. Determine and determine a connection request for the access point according to its priority. A method for receiving reference information for accessing a wireless data network from a remote server in a mobile communication terminal,
Constructing access point information including identification information of at least one access point identified from a search for an access point of the wireless data network;
Transmitting the configured access point information to the remote server to which address information for access is previously specified;
Receiving reference information which is a response according to the transmitted connection point information;
Confirming the signal strength with respect to the connection point described in the received reference information, one or more reference values for the connection point described in the received reference information, and any of the specified signal strengths corresponding to the reference value or the reference value Obtaining a reference value for the identified signal strength based on the signal strength information, and determining the priority of the at least some connection points based on the magnitudes of the respective reference values obtained for at least some of the connection points described in the reference information; ,
Requesting access to the access point according to the determined priority,
And wherein the reference value is information representing a reception bandwidth from a terminal point of view. 56. The method of claim 55,
And all the above steps are performed while being connected to the wireless data network through any one access point. 57. The method of claim 56,
And the access point information further includes information on a used bandwidth measured at the time of receiving data from the access point with respect to the access point including the identification information. 56. The method of claim 55,
And wherein said all steps are performed while not connected to said wireless data network. 56. The method of claim 55,
The determining may include checking signal strength of the access point from previously stored access point search information or confirming signal strength of the access point by searching for access point of the wireless data network after receiving the reference information. How to use reference information for.

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