KR20150005839A - Method for controlling WLAN module, storage medium recording program and terminal therefor - Google Patents

Abstract

The present invention discloses a method for controlling a wireless local area network (WLAN) module for performing traffic offloading by a wireless LAN access device which a user often uses and a recording medium recording a program and a terminal therefor. The terminal according to the present invention comprises: a communication unit including a WLAN module to communication with a WLAN system and a cellular module to communicate with a cellular communication system; a storage unit for storing a mapping database indicating mapping relationships between measured channel state measurement results and accumulated channel state measurement data using a WLAN access device in the WLAN system and a cellular signal received from at least one base station; and a control unit for collecting a channel state measurement result for at least one base station through the cellular communication module for a given period of time when a predetermined event is detected, calculating a matching value between the collected channel state measurement result and the mapping database, and turning the WLAN module on when the matching value is equal to or greater than a predetermined threshold value.

Description

[0001] The present invention relates to a WLAN module, and more particularly,

The present invention relates to a wireless LAN (WLAN) module control method, and more particularly, to a method for controlling a wireless LAN module of a terminal using cellular network information, And a terminal.

The 3rd Generation Partnership Project (3GPP), which establishes the technical specifications of the 3G mobile communication system, finds and selects a wireless communication system for efficient movement between the 3GPP system and other wireless communication systems (for example, 802.11 system, 802.16 system, And an access network discovery and selection function (ANDSF). The ANDSF provides the terminal with information necessary for efficiently discovering and selecting the access network in the environment supporting the heterogeneous wireless access network, periodically determining the location of the terminal and updating the changed information, And provides a function of guiding the connection of the terminal.

Korean Patent Laid-Open No. 10-2012-0001361, Jan. 04, 2012 (Name: Method and Apparatus for Handover of Different Radio Networks)

However, by using the ANDSF function, traffic offload is induced from the viewpoint of a business rather than from the viewpoint of the user, the battery of the terminal is unnecessarily consumed because frequent updating is required for positioning the terminal, There is a problem that accuracy of the positioning technique is deteriorated.

It is an object of the present invention to provide a method for controlling a wireless LAN module to perform traffic offload through a wireless LAN access device frequently used by a user for a user, a recording medium on which a program for the wireless LAN module is recorded, and a terminal .

It is another object of the present invention to provide a method for smoothly connecting to a wireless LAN access device frequently used by a user while minimizing power consumption of the terminal, a recording medium on which a program for the connection is recorded, and a terminal.

It is another object of the present invention to provide a method for controlling a wireless LAN module based on a channel state measured using a cellular signal, a recording medium on which a program for the wireless LAN module is recorded, and a terminal.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

According to an aspect of the present invention, there is provided a terminal comprising: a communication unit including a wireless LAN module for communication with a wireless LAN system and a cellular module for communication with a cellular communication system; A storage unit for storing a mapping database indicating a mapping relationship between measured channel state measurement data and accumulated channel state measurement data using a cellular signal received from a base station and a storage unit for storing, And transmits the measured channel state measurement result to the mapping database. When the matching value is equal to or greater than a preset threshold value, the wireless LAN module is turned on, .

According to another aspect of the present invention, there is provided a terminal, comprising: a communication unit including a wireless LAN module for communication with a wireless LAN system and a cellular module for communication with a cellular communication system; A storage unit for storing a mapping database indicating a mapping relationship between the measured channel state measurement data and channel state measurement data measured using the cellular signal received from the base station, and a connection unit for connecting the wireless LAN access apparatus connected through the wireless LAN module It is determined whether or not the connected WLAN access device is a wireless LAN access device to which the connected WLAN access device frequently accesses by comparing the frequency with a preset threshold value. If the connected WLAN access device frequently accesses the wireless LAN access device, And collects the channel state measurement result for the channel state A control unit that generates more than mapping database.

According to another aspect of the present invention, there is provided a method of controlling a wireless LAN module including a wireless LAN module for communicating with a wireless LAN system and a cellular module for communicating with a cellular communication system, Collecting channel state measurement results measured using a cellular signal received from one or more base stations for a predetermined period of time, calculating a matching value between the collected channel state measurement results and a mapping database, And the mapping database includes a mapping relationship between accumulated channel state measurement data and channel state measurement results of the wireless LAN access point and one or more base stations, .

According to another aspect of the present invention, there is provided a method for generating a mapping database for controlling a wireless LAN module, the terminal including a wireless LAN module for communication with a wireless LAN system and a cellular module for communication with a cellular communication system Determining whether the connected wireless LAN access point is a wireless LAN access point to which the connected wireless LAN access point frequently accesses by comparing the connection frequency of the wireless LAN access point connected through the wireless LAN module with a preset threshold value, Collecting channel state measurement results measured using a cellular signal received from one or more base stations when the LAN access device frequently accesses a wireless LAN access device, and generating a mapping database using the collected channel state measurement results Wherein the mapping database comprises a wireless LAN access device and one or more devices And the mapping state between the accumulated channel state measurement data and the channel state measurement result for the base station.

According to the embodiment of the present invention, traffic offload can be performed through a WLAN access device frequently used by a user in the user's viewpoint.

Further, according to the embodiment of the present invention, it is possible to smoothly connect to a wireless LAN access device frequently used by a user while minimizing power consumption of the terminal.

In addition, according to the embodiment of the present invention, the wireless LAN module can be controlled through a channel state measurement technique using a conventional cellular signal without a separate device.

The effects obtained in the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description .

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the technical features of the invention.
1 is a diagram illustrating an architecture for Access Network Discovery Support Functions (ANDSF) defined in 3GPP.
Figure 2 is a schematic illustration of a network to which the present invention may be applied.
3 is a diagram illustrating a method of generating a mapping database between channel state measurement data and a WLAN access device according to an embodiment of the present invention.
4 is a diagram for explaining a mapping database between a channel state measurement result and a wireless LAN access device according to an embodiment of the present invention.
5 is a diagram illustrating a mapping database generated according to a location of a terminal in the example of FIG.
6 is another diagram illustrating a method of generating a mapping database between channel state measurement data and a WLAN access device according to an embodiment of the present invention.
7 is a diagram illustrating a method of controlling a wireless LAN module of a terminal according to an embodiment of the present invention.
8 is a diagram illustrating a configuration of a terminal according to an embodiment of the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following detailed description, together with the accompanying drawings, is intended to illustrate exemplary embodiments of the invention and is not intended to represent the only embodiments in which the invention may be practiced. The following detailed description includes specific details in order to provide a thorough understanding of the present invention. However, those skilled in the art will appreciate that the present invention may be practiced without these specific details.

In some instances, well-known structures and devices may be omitted or may be shown in block diagram form, centering on the core functionality of each structure and device, to avoid obscuring the concepts of the present invention.

Throughout the specification, when an element is referred to as "comprising" or " including ", it is meant that the element does not exclude other elements, do. Also, the terms " part, "" module," and " module ", etc. in the specification mean a unit for processing at least one function or operation and may be implemented by hardware or software or a combination of hardware and software have. Also, the terms " a or ", "one "," the ", and the like are synonyms in the context of describing the invention (particularly in the context of the following claims) May be used in a sense including both singular and plural, unless the context clearly dictates otherwise.

The specific terminology used in the following description is provided to aid understanding of the present invention, and the use of such specific terminology may be changed into other forms without departing from the technical idea of the present invention.

In this specification, a 'base station (BS)' is a terminal node of a network that directly communicates with a terminal, and includes a fixed station, a Node B, an eNode B (eNB) Can be replaced by terms. The term 'terminal' refers to a user equipment (UE), a mobile station (MS), a mobile subscriber station (MSS), a subscriber station (SS), an advanced mobile station (AMS) -Type Communication, Machine-to-Machine (M2M), Device-to-Device (D2D), and Station (STA). In addition, a wireless LAN access device (e.g., an access point (AP)) is a wireless LAN (WLAN) system in which wireless terminals (or STAs) Means an entity that enables access to a wireless LAN system through a medium, and corresponds to a base station.

Hereinafter, the present invention proposes a method for controlling access to a wireless LAN of a terminal through a value measured using a cellular network signal. In the present invention, it is assumed that the terminal is a terminal having both a RAT (Radio Access Technology) function capable of communicating with a cellular mobile communication method and a RAT function capable of communicating with a wireless LAN communication method.

1 is a diagram illustrating an architecture for Access Network Discovery Support Functions (ANDSF) defined in 3GPP.

As described above, 3GPP defines an ANDSF supporting discovery and selection of a wireless communication system for efficient movement between a 3GPP system and other wireless communication systems (for example, an 802.11 system, an 802.16 system, and the like). The network element for the ANDSF provides the terminal with the information necessary for the terminal to efficiently discover and select the access network in an environment supporting the heterogeneous wireless access network. A DM (Device Management) protocol of Open Mobile Alliance (OMA) is used as a protocol between the terminal and the network element for ANDSF.

The information provided by the network element for the ANDSF includes an inter-system mobility policy and access network discovery information. The heterogeneous access network mobility policy represents the rules for connection authorization and the preference (or priority) for a particular network that affect the terminal when it determines the mobility between heterogeneous access networks. The terminal can determine the time when the mobility between heterogeneous access networks is allowed or restricted through this information and select the most preferred access network to connect to the core network. The access network discovery information indicates the type of the access network, the ID of the access network, and related information of the access network and the status information accessible from the position of the terminal with respect to the RAT type requested by the terminal.

As described above, the network element for ANDSF periodically determines the location of the terminal, updates the changed information, and induces the terminal to connect according to the policy defined by the provider. However, the ANDSF operates based on the policy provided by the service provider to the terminal, and monitors the status of the wireless LAN access device managed by the service provider rather than the wireless LAN access device to which the user mainly accesses, And controls ON / OFF of the power supply of the LAN module. If ANDSF is used to control ON / OFF of the power of the wireless LAN module of the terminal, traffic offload is induced from the cellular system to the wireless LAN system from the viewpoint of the user, not from the user's point of view. In order to perform the operation, it is necessary to update frequently between the terminal and the network element for the ANDSF, so that unnecessary terminal battery is consumed and the position of the terminal is measured by utilizing the wireless LAN, cellular, GPS, etc. However, There is a problem that the positioning accuracy is low.

Accordingly, in the present invention, channel state measurement data for each base station is frequently stored in the wireless LAN access device used by the user as status information, and when a situation identical or similar to the previously stored status information occurs, And then guiding the wireless LAN access device to reconnect to the wireless LAN access device. This will be described below with reference to FIG. 2, a network to which the present invention can be applied is schematically illustrated, but the present invention is not limited thereto, and the present invention can be applied to a wireless communication system supporting heterogeneous (multiple) wireless access networks.

Figure 2 is a schematic illustration of a network to which the present invention may be applied.

In FIG. 2, an ellipse of a dotted line illustrates a coverage area served by each base station (base stations A, B, and C), and an ellipse of a solid line illustrates a coverage area served by a wireless LAN access device.

Referring to FIG. 2, a coverage area served by a wireless LAN access point of a wireless LAN system is overlapped within a coverage area served by a plurality of base stations. The terminal is located within the coverage areas of the base stations A, B, and C, and is also located within the coverage area of the wireless LAN access device, so that the terminal can connect to the cellular system and / or the wireless LAN system.

A terminal located in a coverage area of a base station not only uses a cellular signal transmitted from a currently connected serving base station (or serving cell) but also a cellular signal transmitted periodically in a neighboring base station (or neighboring cell) Or wireless channel quality. In this case, when the terminal is connected to the wireless LAN system through the wireless LAN access device, if the wireless LAN access device is a wireless LAN access device frequently used by the user, The channel status measurement result measured through the signal can be accumulated and stored as status information by mapping the connected WLAN access point information. Hereinafter, for convenience of description, the accumulated data of channel state measurement results for each base station is referred to as channel state measurement data. 2, since the UE is located within the cell coverage of the base station A, the base station B, and the base station C, the serving base station uses the cellular signals transmitted from the base stations A, B, And each measure the strength of the signal or the radio channel quality. That is, while the terminal is connected to the wireless LAN access point, the terminal cumulatively collects the measurement result of the wireless channel quality or the like using the strength of the cellular signal transmitted from each base station in the vicinity of the wireless LAN access apparatus or the cellular signal, It is possible to create a database by mapping with a connected WLAN access device. At this time, the mapping database between the channel state measurement data of each base station and the WLAN access point is a form of a probability distribution / density function calculated based on the number of times measured by the terminal, Lt; / RTI > Here, as an example of a cellular signal, a signal transmitted in order to correct distortion of a data / signal of a transmitting / receiving end in a wireless communication system includes a reference signal (in particular, a common / (Or a pilot signal) or a synchronization signal for synchronizing a terminal and a base station may be used. In the present invention, in order to simplify the description, a terminal uses a cellular signal The reference signal received power (RSRP) defined in the 3GPP LTE / LTE-A system, the reference signal strength (RSRP) defined in the 3GPP LTE / LTE-A system, (RSRQ), a received signal strength indicator (RSSI), a signal to noise ratio (SNR) (SINR), an Ec / Io defined in a wideband code division multiple access (WCDMA) network, a received signal code power (RSCP), an SNR, an SINR And so on.

Then, the terminal can control ON / OFF of the wireless LAN module of the terminal using the measured channel state value using the monitored cellular signal. As described above, since the reference signal is transmitted and received periodically from the base station as a signal transmitted for correcting the distortion of the data / signal at the transmission / reception end, the terminal continuously receives the reference signal transmitted from the base station while being connected to the cellular network The strength of the signal or the quality of the radio channel can be measured. Therefore, if the channel state value measured using the reference signal monitored for a predetermined time in the terminal is matched with the channel state measurement data for each base station stored at a predetermined level or more, the terminal may previously connect to the corresponding WLAN access device It is possible to control ON / OFF of the wireless LAN module. In the case of FIG. 2, if the UE moves to the coverage area of the corresponding WLAN access device after storing the channel state measurement data for the base stations A, B, and C by mapping with the WLAN access device frequently accessed by the terminal, The terminal checks the matching similarity between the channel state value measured using the reference signal transmitted from the base stations A, B, and C and the stored mapping database, and turns on the power of the wireless LAN module (or turns on ) To connect to the wireless LAN connection device again. That is, when the terminal arrives at a position the same as or similar to the position connected to the wireless LAN access device frequently connected to the wireless LAN access device, the terminal can indirectly check the wireless LAN access device through the cellular signal. Connection is possible.

Hereinafter, while the UE capable of communicating with both the cellular mobile communication system and the WLAN communication system performs communication with the serving base station through the cellular communication scheme as described above, A method for controlling a wireless LAN module according to a channel state result for a cellular signal and a database matching rate (i.e., matching similarity) with respect to a mapping relationship between channel state measurement data for each base station and a wireless LAN access device Will be described in detail.

3 is a diagram illustrating a method of generating a mapping database between channel state measurement data and a WLAN access device according to an embodiment of the present invention.

Referring to FIG. 3, when the terminal accesses the wireless LAN access device of the wireless LAN system (S301), the terminal determines whether the connected wireless LAN access device is a wireless LAN access device frequently accessed (S303). That is, the terminal cumulatively stores the addresses of the connected WLAN access devices every time the terminal is connected to the WLAN access device, and when the frequency of connecting the specific WLAN access devices is equal to or greater than a predetermined threshold value (or more) Can be determined to be a wireless LAN access device that frequently connects to the network. At this time, the address of the wireless LAN access device may be represented by a BSSID or an IP address format having a size of 48 bits. The BSSID may also be referred to as a MAC address, which means a 48-bit address assigned to each communication device, and the address is a globally unique address.

The process of determining whether or not the wireless LAN access device frequently connected to the connected wireless LAN access device can be performed every time the terminal connects to the wireless LAN access device, Or more). If it is determined that the wireless LAN access device is a wireless LAN access device that frequently connects to the wireless LAN access device, the determination process may be omitted if the wireless LAN access device is connected to the wireless LAN access device again. That is, when it is determined that the wireless LAN access device has frequently accessed once, it can be determined that the wireless LAN access device frequently accesses the wireless LAN access device without checking the access frequency again.

If it is determined in step S303 that the currently connected WLAN access device is a frequently accessed WLAN access device, if it is determined that the WLAN access device is not a frequently accessed WLAN access device (i.e., Threshold value or less), the process is terminated without performing the subsequent process (S305).

On the other hand, if it is determined in step S303 that the currently connected WLAN access device is a frequently accessed WLAN access device, if the WLAN access device frequently accesses the WLAN access device, And accumulates and accumulates the channel state measurement result of each base station using the cellular signal received from the neighboring base station (S307). That is, if the terminal periodically reports a channel status result through a cellular signal received from each base station and reports the result to the base station, if the currently connected wireless LAN access point frequently accesses the wireless LAN access point, One channel state measurement result is accumulated and collected.

In step S309, the terminal generates a mapping database between the channel state measurement data for one or more base stations and the WLAN access point based on the measured channel state measurement result for each base station. The mapping database between the channel state measurement data and the WLAN access point includes at least one of a base station set including at least one base station mapped with the WLAN access point, identification information (or address information) of the WLAN access point, Information and channel state measurement data for each base station. At this time, the channel state measurement data for each base station may be stored in a form (for example, a table form) indicating the number of times measured for each channel state measurement result value, and may be calculated based on the number of times measured for each channel state measurement result value And can be stored in the form of a probability distribution / density function.

The process of collecting the result of measuring the channel state using the cellular signal received from each base station and the mapping database between the channel state measurement data and the wireless LAN access device may be performed by the terminal Is repeated until it is released and the database is continuously updated.

FIG. 4 is a diagram for explaining a mapping database between channel state measurement data and a WLAN access device according to an embodiment of the present invention. FIG. 5 illustrates a mapping database generated according to a location of a terminal in the example of FIG. FIG. Hereinafter, the channel state measurement result will be described on the assumption of RSRP for convenience of explanation.

4 and 5, an ellipse of a dotted line in FIG. 4 illustrates a coverage area served by each of the base stations (base stations A, B, C, and D), and an ellipse of a solid line indicates a coverage area Device 1, and wireless LAN access point 2). As described above, the mapping database between the channel state measurement data and the WLAN access point includes the identification information (or address information) of the WLAN access point, a set of base stations including one or more base stations mapped to the WLAN access point, And a channel state measurement result for each base station.

Hereinafter, for convenience of explanation, both the wireless LAN access point 1 and the wireless LAN access point 2 correspond to a wireless LAN accessing apparatus that frequently connects, and when the terminal is located at a and b, the terminal is connected to the wireless LAN access point 1 And the terminal is located at c and d, it is assumed that the terminal is connected to the wireless LAN access point 2. In the case of being located in the terminals a to d, the terminal collects the channel state measurement results for the serving base station and the neighboring base station because the terminal is connected to the wireless LAN access device frequently connected thereto.

First, when the UE is located in a, the UE is located within the coverage area of the Node B, but is out of the coverage area of the neighboring base stations B, C, and D. Therefore, the UE uses only the cellular signal received from the base station A, The channel state measurement data for the base station A and the mapping database between the wireless LAN access point 1 can be generated. 5, when the terminal is located at a, the database generated by the terminal is mapped to the wireless LAN access point 1 and the base station A, and the RSRP value measured using the cellular signal received from the base station A may be stored have. Here, the channel state measurement data can be stored in the form of the number of times measured for each channel state measurement value (left side), and stored in the form of a probability distribution / density function calculated based on the number of times measured for each channel state measurement result (Right).

If the terminal is located in b, since the terminal is located within the coverage area of the base station A and the base station B, the terminal measures the channel state of the base stations A and B using the cellular signal received from the base station A and the base station B And can generate a mapping database between the channel state measurement data for the base stations A and B and the wireless LAN access point 1. That is, as described above, the UE performs channel state measurement for the serving BS and the neighbor BS. Thus, regardless of whether the serving BS is A or B, the MS transmits channel state measurement data for the BSs A and B to the WLAN 1 You can create a mapping database. 5, when the terminal is located at b, the database generated by the terminal is mapped to the wireless LAN access point 1, the base station A and the base station B, and using the respective cellular signals received from the base station A and the base station B The measured RSRP value can be stored for each base station. Also in this case, the channel state measurement data can be stored in the form of the number of times measured for each channel state measurement value (left side), and the shape of the probability distribution / density function calculated based on the number of times measured for each channel state measurement value (Right).

When the terminal is located at c, the terminal is located in the coverage area of the base station A and the base station C, respectively. Therefore, the terminal collects the measurement results of the channel conditions for the base stations A and C using the cellular signals received from the base stations A and C, and acquires channel state measurement data for the base stations A and C and the wireless LAN connection apparatus 1 You can create a mapping database. 5 and the terminal is located at c, the database generated by the terminal is mapped to the wireless LAN access point 1, the base station A and the base station C, and is measured using the respective cellular signals received from the base station A and the base station C An RSRP value can be stored for each base station. Also in this case, the channel state measurement data can be stored in the form of the number of times measured for each channel state measurement value (left side), and the shape of the probability distribution / density function calculated based on the number of times measured for each channel state measurement value (Right).

When the terminal is located at d, the terminal is located in the coverage area of the base station A, the base station C, and the base station D. Therefore, the terminal collects the measurement results of the channel conditions for the base stations A, C, and D using the cellular signals received from the base station A, the base station C, and the base station D, And a mapping database between the wireless LAN access point 1 and the wireless LAN access point 1. 5, when the terminal is located at d, the database generated by the terminal is mapped to the wireless LAN access point 1 and the base station A, the base station C, and the base station D, and the base station A, the base station C, The RSRP value measured using the cellular signal of each base station can be stored for each base station. Also in this case, the channel state measurement data can be stored in the form of the number of times measured for each channel state measurement value (left side), and the shape of the probability distribution / density function calculated based on the number of times measured for each channel state measurement value (Right).

As described above, even if the same wireless LAN access device is used, the number of base stations to be mapped to the wireless LAN access device may be one or more according to the location of the terminal. That is, the base station set to be mapped to the wireless LAN access point 1 may be two {base station A}, {base station A, base station B}, and the base station set mapped to the wireless LAN access point 2 may be {base station A, (Base station A, base station C, base station D).

4 and 5 are merely examples for explaining the present invention. It is to be noted that the location of the base station, the location of the wireless LAN access point, the location of the terminal, the signal strength of each base station or the wireless LAN access point, Various databases can be created depending on environment and the like.

On the other hand, unlike the example of FIG. 3, a mapping database between the WLAN access device and channel state measurement data is not generated every time the terminal is connected to a frequently accessed WLAN access device. Only when a predetermined condition is satisfied, A mapping database between the LAN connection device and the channel state measurement data may be constructed. This will be described below with reference to FIG.

6 is another diagram illustrating a method of generating a mapping database between channel state measurement data and a WLAN access device according to an embodiment of the present invention.

The steps S601 to S607 of FIG. 6 are the same as those of the steps S601 to S307 in the example of FIG. 3, and the description thereof will be omitted.

The terminal having collected the measurement result of the channel state using the cellular signal received from the serving base station and the neighboring base station generates the temporary database between the channel state measurement data for one or more base stations and the wireless LAN access device based on the channel state measurement result (S609).

Then, the terminal determines whether the provisional database satisfies predetermined conditions (S611). For example, when the time period in which the temporary database is created is accumulated and is equal to or greater than a predetermined threshold value (for example, 12 hours) or in the same time zone (for example, 1:00 pm to 2:00 pm or 10:00 pm to 12:00 pm) It is possible to determine whether the number of times the temporary database is generated is equal to or greater than a preset threshold value.

If it is determined in step S611 that the temporary database does not satisfy the preset predetermined condition, the UE branches to step S607, and the UE continuously measures the channel state using the cellular signal received from each base station, And the temporary database between the wireless LAN access device.

On the other hand, if the temporary database satisfies a predetermined condition in step S611, the terminal generates a mapping database between the channel state measurement data of the one or more base stations and the wireless LAN access device using the temporary database (S613). In addition, even after the mapping database between the channel state measurement data and the wireless LAN access device is created, the process of measuring the channel state using the cellular signal received from each base station by the terminal and the mapping between the channel state measurement data and the wireless LAN access device The process of creating the database is repeatedly performed until the terminal is disconnected from the corresponding WLAN access device, thereby continuously updating the mapping database.

Herein, when there are a plurality of base stations included in the set of base stations mapped to one WLAN access device, the terminal can determine whether the temporary database satisfies a preset predetermined condition for each base station. For example, in the example of FIG. 5, when the terminal is located at b, the cumulative time of measuring the channel state with respect to the base station A is longer than a predetermined time, and the cumulative time measured by the base station B is less than a predetermined time The mapping database between the channel state measurement data and the WLAN access device can be created using the temporary database only for the base station A.

As described above, the reliability of the database can be improved by constructing the regular mapping database only when a certain condition is satisfied after the creation of the temporary database, thereby achieving a more accurate control of the wireless LAN module.

The terminal that has generated the mapping database mapping the channel state measurement data for each wireless base station and the wireless LAN access device can control the wireless LAN module by comparing the channel state measurement result measured using the received cellular signal with the mapping database . This will be described with reference to FIG.

7 is a diagram illustrating a method of controlling a wireless LAN module of a terminal according to an embodiment of the present invention.

Referring to FIG. 7, the terminal detects occurrence of a predetermined event (S701). Here, the specific event refers to a preset trigger event for starting a series of operations for discovering and selecting a wireless LAN access device frequently used by a user through matching a channel state value measured by the terminal with a pre-stored mapping database And is not limited as long as it is a preset trigger event. For example, the event according to the present invention may be pre-set touch / button input from a user, or may be activated by a touch / button / key input from a user (for example, Display ON means that the terminal is unlocked or means the start of the update operation of a program (for example, an OS (Operating System) program or an application program) stored in the terminal, Means transmission of a message for requesting downloading of a program to the server, means reaching a preset time (for example, 8:00 pm) by the user, or means that the user is close to a predetermined distance or more can do.

In step S703, the mobile station senses that a predetermined event has occurred and collects channel state measurement results for each base station using the cellular signal received from the serving base station and the neighboring base station. At this time, the UE can collect the measurement result of the channel state of the serving BS and the neighbor BS for a predetermined time interval. That is, as described above, if the UE periodically detects the occurrence of a preset event in step S301 while measuring the channel status result through the cellular signal received from each base station and reports the result to the base station, The state measurement result is collected for a predetermined time.

The terminal that has collected the channel state measurement results of the serving base station and the neighbor base station uses the collected channel state measurement result and the mapping database matching algorithm between the wireless LAN access device and channel state measurement data stored in advance according to the example of FIG. 3 to FIG. (Or determines the matching value) (S703). As an example of the matching algorithm, a hearing distance (Hellinger Distance) or a support vector machine can be used. However, this is merely an example and can be used without limitation as long as it is an algorithm capable of calculating a matching rate or degree of likelihood of a mapping database and a channel state measurement result.

In step S707, the terminal that has calculated the channel state measurement result of the serving base station and the neighboring base station using the matching algorithm and the matching value of the mapping database determines whether the calculated matching value is equal to or greater than a preset threshold value.

If the matching value is less than (or equal to) a preset threshold value in step S707, the terminal branches to step S703, and the terminal continues to collect channel state measurement results measured using the cellular signal, The matching value of the database is calculated.

On the other hand, if the matching value is greater than (or exceeds) the predetermined threshold value in step S707, the terminal turns on the power of the wireless LAN module (or activates the function) (step S709) Selects at least one WLAN access device list determined to be equal to or greater than a threshold value, and attempts to connect to the selected WLAN access device (711).

Although not shown in FIG. 7, the terminal having completed the connection to the selected WLAN access device is a WLAN access device frequently used by the user. Therefore, the terminal, which is similar to the method illustrated in FIG. 3 or 6, Continuously collects measured channel state measurement results using the cellular signal received from each base station, and continuously updates the channel state measurement data for each base station and the mapping database between the wireless LAN access devices.

8 is a diagram illustrating a configuration of a terminal according to an embodiment of the present invention.

The configuration of the terminal 800 shown in FIG. 8 shows functional elements that are functionally separated, and any one or more configurations may be physically integrated with each other.

8, a terminal 800 according to an embodiment of the present invention includes at least one of a communication unit 810, a storage unit 820, a control unit 830, an input unit 840, and an output unit 850 And the like. The communication unit 810 may include a wireless LAN module 811 and a cellular module 813. The communication unit 810, the wireless LAN module 811, the cellular module 813, the storage unit 820, the control unit 830, the input unit 840 and the output unit 850 constituting the terminal 800 are included in the present invention Can be mutually and functionally linked to perform the corresponding functions.

The communication unit 810 may be configured to include the wireless LAN module 811 and the cellular module 813 as described above.

The wireless LAN module 811 provides an interface for enabling wireless communication with the wireless LAN system, and the cellular module 813 provides an interface for enabling wireless communication with the cellular network. Particularly, in the present invention, the wireless LAN module 811 may be turned on / off by the control of the controller 830, or the function may be activated / deactivated. In addition, the cellular module 813 can receive the cellular signal transmitted from the base station.

The storage unit 820 stores data and programs necessary for the operation of the terminal 800 and stores an operating program and an application program (for example, an application or a web browser) to be executed by the terminal 800 do. In particular, in the present invention, the storage unit 820 may store a mapping database and / or a temporary database that maps the channel state measurement data of each wireless base station and the wireless LAN access device generated by the controller 830.

The storage unit 820 may be implemented by various storage means. For example, the storage unit 820 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD A random access memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM) , A magnetic memory, a magnetic disk, or an optical disk. The storage unit 820 may be inside or outside the control unit 830 and may be connected to the control unit 830 by various well-known means.

The input unit 840 generates input data for controlling the operation of the terminal 800 by a user. Particularly, in the present invention, when an event is generated due to a user's input, the input unit 840 can receive an input for generating an event from the user. For example, when the preset event indicates activation of the terminal screen as described above, the user can receive a touch / button / key input from the user to generate the event.

The input unit 840 may be realized by various input means. For example, the input unit 840 may include at least one of a key pad, a dome switch, a touch pad (static / static), a jog wheel, a jog switch, and a voice input unit. In addition, the input unit 840 performs a function for inputting an audio signal or a video signal, and may include a camera and a microphone. The camera processes image frames such as still images or moving images obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame can be displayed on the display unit 850. The image frame processed by the camera may be stored in the storage unit 820 or may be transmitted to the outside through the communication unit 810. [ The microphone receives an external acoustic signal by a microphone in a communication mode, a recording mode, a voice recognition mode, and the like and processes it as electrical voice data. The processed voice data can be converted into a form that can be transmitted to the mobile communication base station through the communication unit 810 and output when the voice data is in the communication mode. A variety of noise canceling algorithms may be implemented in the microphone to remove noise generated in receiving an external acoustic signal.

The display unit 850 outputs the operation status and operation result of the terminal to the user under the control of the control unit 830. [ Particularly, in the present invention, when the event indicates that the display unit 850 is activated, the display unit 850 can be activated under the control of the control unit 830 by the input of the input unit 840 from the user.

The display unit 850 may be implemented by various display means. For example, the display unit 850 may be a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT-LCD), a light emitting diode (LED), an organic light emitting diode (OLED) Light Emitting Diodes, a flexible display, and a 3D display.

In the case where the display unit 850 and the sensor for sensing the touch operation have a mutual layer structure (touch screen), the display unit 850 can be used as an input device in addition to the output device. The touch sensor may have the form of, for example, a touch film, a touch sheet, a touch pad, or the like. The touch sensor may be configured to convert a change in a pressure applied to a specific portion of the display portion 850 or a capacitance generated in a specific portion of the display portion 850 into an electrical input signal. The touch sensor can be configured to detect not only the position and area to be touched but also the pressure at the time of touch. When there is a touch input to the touch sensor, the corresponding signal (s) is transmitted to the control unit 830. Through the transmitted signal, the control unit 830 notifies which area of the display unit 850 is touched, .

The control unit 830 controls overall control of the terminal 800 and controls the flow of signals for performing functions of the communication unit 810, the storage unit 820, the input unit 840, and the display unit 850 . At this time, the control unit 8309 may be implemented as an operating system (OS), an application program (for example, an application or a web browser) and a process unit for driving each configuration, for example, a central processing unit Lt; / RTI >

Particularly, in the present invention, the control unit 830 implements the functions, processes, and / or methods proposed in FIGS. 2 to 7 above. The controller 830 controls the wireless LAN module 811 to transmit and receive wireless signals to and from the wireless LAN system. The controller 830 controls the cellular communication module 813 to transmit and receive wireless signals to and from the cellular network. In addition, the controller 830 can determine whether the connected wireless LAN access device is a wireless LAN access device that is frequently accessed through the wireless LAN module 811. In addition, the controller 830 can measure the channel state using the cellular signal received through the cellular communication module 813, and transmit the measured channel state value to the base station. In addition, when the currently connected WLAN access device is a wireless LAN access device frequently connected to the WLAN or when a preset event is detected, the measured channel state measurement result can be collected for each base station. In addition, a mapping database and a temporary database between the channel state measurement data and the WLAN access point may be generated based on the collected channel state measurement results and stored in the storage unit 820. The controller 830 may calculate a matching value between the channel state measurement result measured through the cellular signal received through the cellular communication module 813 and the mapping database stored in the storage unit 820 using a matching algorithm . The controller 830 controls the ON / OFF of the power supplied to the wireless LAN module 811 by controlling the power supply unit (not shown), and controls the function of the wireless LAN module 811 to be activated / deactivated The wireless LAN module 811 can be controlled.

The terminal described in this specification can be implemented in various forms. For example, a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a tablet PC, a PDA (personal digital assistant), a portable multimedia player (PMP) A fixed terminal such as a smart TV, a set-top box, a desktop computer and the like may be used as well as the mobile terminal of the present invention.

Embodiments in accordance with the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof. In the case of hardware implementation, an embodiment of the present invention may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs) field programmable gate arrays, processors, controllers, microcontrollers, microprocessors, and the like.

In addition, in the case of an implementation by firmware or software, an embodiment of the present invention may be embodied in the form of a module, a procedure, a function, and the like for performing the functions or operations described above, Lt; / RTI > Here, the recording medium may include program commands, data files, data structures, and the like, alone or in combination. Program instructions to be recorded on a recording medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. For example, the recording medium may be an optical recording medium such as a magnetic medium such as a hard disk, a floppy disk and a magnetic tape, a compact disk read only memory (CD-ROM), a digital video disk (DVD) Optical media such as a floppy disk and a hardware device specifically configured to store and execute program instructions such as ROM, RAM, flash memory and the like. Examples of program instructions may include machine language code such as those generated by a compiler, as well as high-level language code that may be executed by a computer using an interpreter or the like. Such hardware devices may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be apparent to those skilled in the art. Furthermore, although specific terms are used in this specification and the drawings, they are used in a generic sense only to facilitate the description of the invention and to facilitate understanding of the invention, and are not intended to limit the scope of the invention. Accordingly, the foregoing detailed description is to be considered in all respects illustrative and not restrictive. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

In addition, a device or terminal according to the present invention may be driven by instructions that cause one or more processors to perform the functions and processes described above. Such instructions may include, for example, interpreted instructions such as script commands, such as JavaScript or ECMAScript commands, or other instructions stored in executable code or computer readable media. Further, the apparatus according to the present invention may be implemented in a distributed manner across a network, such as a server farm, or may be implemented in a single computer device.

Further, a computer program (also known as a program, software, software application, script or code) that is embedded in the apparatus according to the present invention and which implements the method according to the present invention includes a compiled or interpreted language, a priori or procedural language , And may be deployed in any form including standalone programs or modules, components, subroutines, or other units suitable for use in a computer environment. A computer program does not necessarily correspond to a file in the file system. The program may be stored in a single file provided to the requested program, or in multiple interactive files (e.g., a file storing one or more modules, subprograms, or portions of code) (E.g., one or more scripts stored in a markup language document). A computer program may be deployed to run on multiple computers or on one computer, located on a single site or distributed across multiple sites and interconnected by a communications network.

Moreover, in describing the embodiments according to the present invention, operations are depicted in the drawings in a particular order, but it is to be understood that they should perform such operations in that particular order or sequential order shown in order to obtain the desired result, Should not be understood as being performed. In certain cases, multitasking and parallel processing may be advantageous. Also, the separation of the various system components of the above-described embodiments should not be understood as requiring such separation in all embodiments, and the described program components and systems will generally be integrated together into a single software product or packaged into multiple software products It should be understood.

Although the present invention has been described with reference to an example in which the wireless LAN module control method is applied to the 3GPP LTE / LTE-A system and the wireless LAN system, the present invention can be applied to various wireless access systems.

800 terminal 810 communication unit 811 wireless LAN module
813: Cellular module 820: Storing section 830: Control section
840: input unit 850:

Claims (12)

A wireless LAN module for communicating with a wireless local area network (WLAN) system; And
A communication unit including a cellular module for communication with a cellular communication system;
A storage unit for storing a mapping database that indicates a mapping relationship between channel state measurement data and channel state measurement data obtained by measuring a channel state measurement using a cellular signal received from the wireless LAN access point of the wireless LAN system and one or more base stations; And
Collecting a channel state measurement result for the at least one base station through the cellular communication module for a predetermined period of time when a preset event is detected, calculating a matching value between the collected channel state measurement result and the mapping database, And turns on the wireless LAN module when the matching value is equal to or greater than a preset threshold value. The apparatus of claim 1,
The preset event may be activated by a preset input from a user or an input from a user, the activation of a screen of the terminal, the release of a locked state of the terminal, the update of a program stored in the terminal, Transmission of a message for requesting, arrival at a time preset by a user, or arrival of a location. The apparatus of claim 1,
And attempts to connect to the WLAN access device whose matching value is determined to be equal to or greater than a preset threshold value through the WLAN module. The apparatus of claim 3,
And updates the mapping database using the channel state measurement result after completing connection to the WLAN access device in which the matching value is determined to be equal to or greater than a preset threshold value. The method according to claim 1,
The channel state measurement result includes a reference signal received power (RSRP), a reference signal received quality (RSRQ), a received signal strength indicator (RSSI), a signal-to-noise ratio (SNR) : Signal to noise ratio) and SINR (Signal to Interference plus Noise Ratio). A wireless LAN module for communicating with a wireless local area network (WLAN) system; And
A communication unit including a cellular module for communication with a cellular communication system;
A storage unit for storing a mapping database that indicates a mapping relationship between channel state measurement data and channel state measurement data obtained by measuring a channel state measurement using a cellular signal received from the wireless LAN access point of the wireless LAN system and one or more base stations; And
Determines whether the connected wireless LAN access point is a wireless LAN access point to which the connected wireless LAN access point frequently accesses by comparing the connection frequency of the wireless LAN access point connected through the wireless LAN module with a preset threshold value, And a controller for collecting channel state measurement results for the at least one base station when the access device frequently accesses and generating the mapping database using the collected channel state measurement results. 7. The apparatus of claim 6,
Generating a temporary database based on the channel state measurement result, and generating the mapping database when the temporary database satisfies a preset condition. 8. The method of claim 7,
Wherein the preset condition indicates whether the cumulative time or the cumulative number of times the temporary database is generated is equal to or greater than a preset threshold value. The method according to claim 6,
Wherein the channel state measurement data has a probability distribution function or a probability density function form calculated based on the number of times measured for each channel state measurement result value. A method for controlling a wireless LAN module for wireless LAN (WLAN) system and a terminal including a cellular module for communication with a cellular communication system,
Collecting channel state measurement results measured using a cellular signal received from one or more base stations for a predetermined period when a preset event is detected;
Calculating a matching value between the collected channel state measurement result and a mapping database; And
And turning on the WLAN module when the matching value is equal to or greater than a preset threshold value,
Wherein the mapping database indicates a mapping relationship between channel state measurement data accumulated in a channel state measurement result of the WLAN access point and the at least one base station. A method for generating a mapping database for wireless LAN module control by a terminal including a wireless LAN module for communication with a wireless local area network (WLAN) system and a cellular module for communication with a cellular communication system,
Determining whether the connected WLAN access device is a frequently accessed WLAN access device by comparing the connection frequency of the WLAN access device connected through the wireless LAN module with a predetermined threshold value;
Collecting measured channel state measurement results using a cellular signal received from one or more base stations when the connected wireless LAN access device frequently accesses a wireless LAN access device; And
And generating the mapping database using the collected channel state measurement results,
Wherein the mapping database indicates a mapping relationship between channel state measurement data accumulated in a channel state measurement result of the WLAN access point and the at least one base station. A computer-readable recording medium recording a program for executing the method according to any one of claims 10 to 11.

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